CN202886463U - Intelligent electric energy meter with functions of electric leakage remote monitoring and protection - Google Patents
Intelligent electric energy meter with functions of electric leakage remote monitoring and protection Download PDFInfo
- Publication number
- CN202886463U CN202886463U CN 201220302501 CN201220302501U CN202886463U CN 202886463 U CN202886463 U CN 202886463U CN 201220302501 CN201220302501 CN 201220302501 CN 201220302501 U CN201220302501 U CN 201220302501U CN 202886463 U CN202886463 U CN 202886463U
- Authority
- CN
- China
- Prior art keywords
- electric energy
- energy meter
- intelligent electric
- central processor
- processor cpu
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000012544 monitoring process Methods 0.000 title claims abstract description 34
- 230000006870 function Effects 0.000 title abstract description 36
- 238000005070 sampling Methods 0.000 claims abstract description 11
- 238000004891 communication Methods 0.000 claims description 116
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000005611 electricity Effects 0.000 description 20
- 238000000034 method Methods 0.000 description 19
- 230000001681 protective effect Effects 0.000 description 10
- 238000005259 measurement Methods 0.000 description 9
- 238000003860 storage Methods 0.000 description 8
- 238000007726 management method Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 230000007935 neutral effect Effects 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 230000001012 protector Effects 0.000 description 5
- 238000001514 detection method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000008676 import Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000006399 behavior Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 238000005314 correlation function Methods 0.000 description 2
- 238000013500 data storage Methods 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 239000013307 optical fiber Substances 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010205 computational analysis Methods 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
Landscapes
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The utility model discloses an intelligent electric energy meter with functions of electric leakage remote monitoring and protection. The intelligent electric energy meter comprises a metering chip, a phase current sampling circuit, a phase voltage sampling circuit, a central processor CPU, an electric leakage current sampling circuit, and a low-voltage breaker. The electric leakage current sampling circuit is electrically connected with the metering chip. The metering chip and the central processor CPU are electrically connected with each other. The central processor CPU is electrically connected with the low-voltage breaker via a trip-out output interface. The low-voltage breaker is electrically connected with the central processor CPU. The beneficial effects of the intelligent electric energy meter are that only through changes within a small scope of a few elements and a circuit based on a conventional intelligent electric energy meter, functions of both the intelligent electric energy meter and an intelligent electric leakage monitoring and protection device can be realized, thereby substantially lowering production costs; and a power supply enterprise can comprehensively monitor electric leakage cases of power users and find and remove electric leakage faults in time, thereby improving power supply reliability, reducing losses of electric energy and minimizing personal and property losses caused by electric leakage.
Description
Technical field
The present invention relates to low voltage electric network power measurement protection apparatus field, relate in particular to a kind of intelligent electric energy meter with electric leakage remote monitoring and defencive function.
Background technology
According to the definition of State Grid Corporation of China's intelligent meter, intelligent electric energy meter is comprised of measuring unit, data processing unit, communication unit etc., has the electric energy meter of the functions such as electrical energy metering, information storage and processing, Real-Time Monitoring, automatically control, information interaction.The full electronic intelligent electric energy meter is the state-of-the-art class watt-hour meter of Now Domestic, and it adopts advanced singlechip technology and custom-designed electric energy measurement integrated circuit, but has measuring accuracy height electricity theft prevention, own loss is low and the reliability high.Some models wherein also have the multi-metering function.
Whole electronic type intelligent electric meter principle of work: during intelligent electric meter work, voltage, electric current are converted to through senser element and send into computation chip after sampled signal is processed by filtering, computation chip is converted into pulse signal with energy signal and delivers to CPU and carry out the electric pulse collection, electric quantity accumulation and every computational analysis are processed, and its result is kept in the data-storing; Simultaneously CPU finishes the function treatment such as infrared, 485 communications, LCD demonstration.Ammeter is with the hardware clock circuit, guarantee clock under nominal temperature clock day error less than 0.5s/d.
According to the requirement of the standardization files such as national grid Q/GDW354-2009 " intelligent electric energy meter functional specification ", domestic existing numerous measuring apparatus manufacturer has produced the intelligent electric energy meter that meets functional requirement and technical requirement.At present the major function that relates to of intelligent electric energy meter comprises: the several functions such as electric energy metrical, electric energy tariffing, data storage, logout, communication, signal output, demonstration, measurement, anti-electricity-theft and electricity charge control.
The function of intelligent electric energy meter from the above mentioned and related standards as seen, existing intelligent electric energy meter does not possess electric leakage remote monitoring and defencive function.
Because some defectives of traditional earth leakage protective device (residual current operated protective device), at present domestic existing various research institutions, equipment producer successively development and production go out based on microprocessor with the intelligent electricity leakage protector of memory, demonstration, communication function.Domestic utility model patent ZL201020196514 discloses a kind of control of intelligent terminal of earth leakage protection tele-control system; propose earth leakage protective device and be connected with communication interface be used to the information that reads earth leakage protective device, the running state information by reading earth leakage protective device also is sent to supervisory control comuter.Open source literature " application of smart electronics electric leakage administrative protection device " (global market information Leader the 9th phase in 2011) proposes the RS485 communication network resource by the ammeter acquisition system; adopt embedded SOC technology and intelligent power measurement technology, realize leakage current test function, sound and light of alarm.The solution that above-mentioned disclosed patent and documents and materials propose is feasible technically, but the integrated application maintenance cost is higher.Be in particular in: need to special-purpose intelligent electricity leakage protector be installed at low voltage electric network; Need special-purpose communication module and communication port; Need special-purpose electric leakage information acquisition main website; and intelligent electricity leakage protector does not have the major functions such as the required electric energy metrical of intelligent electric meter, electric energy tariffing, electricity charge control; therefore, in power consumer, also there is larger difficulty by the large scale application intelligent electricity leakage protector.
In sum, intelligent electric energy meter and the novel intelligent earth leakage protective device of at present existing standard production, in function and technically made significant headway, intelligent electric energy meter has realized that power supply enterprise and power consumer both sides are at electric weight, the two-way exchange of the aspects such as the electricity charge is interactive, intelligent electricity leakage protector has been realized certain customers' electric leakage remote monitoring and protection, but improving user power utilization safety comprehensively, electricity consumption reliability aspect still is difficult to obviously obtain development, be embodied in: (1) is although the existing voltage of part intelligent electric meter, the measurement function of electric current, but the measuring ability that does not have leakage current can't carry out monitoring management to the electric leakage situation of power consumer; (2) low voltage electric network and user's earth leakage protection still generally adopts the earth leakage protective device of total earth leakage protection, branched line earth leakage protection, terminal minute three grades of general types of family earth leakage protection to realize earth leakage protection, can't carry out long-range effective monitoring, adjustment, control and protection to the electric leakage situation of low voltage electric network and power consumer equipment.(3) although there is the part earth leakage protective device to realize intellectuality, and possess the ability of telecommunication, independent communication passage, communication facilities and special-purpose management main website need to be arranged, generally only leak the guarantor for total guarantor of leakage and branch line, be difficult to spread and use.
Summary of the invention
The technical problem to be solved in the present invention is: overcome the deficiencies in the prior art; a kind of intelligent electric energy meter that electric leakage remote monitoring and defencive function are arranged is provided; include remote detection and the creepage protection function of leakage current in the intelligent electric energy meter envelop of function; make intelligent electric energy meter have leakage current detection and earth leakage protection and warning function; automatic analysis is isolated the leak current fault point as required; the transmission of electric leakage information and power information acquisition system share cover network channel and an equipment; compatible power information acquisition system communication protocol, the power utilization information collection system main website can realize take intelligent electric energy meter as the terminal management carrier the long-range electric leakage management to power consumer.
The technical solution adopted in the present invention is: a kind of intelligent electric energy meter with electric leakage remote monitoring and defencive function; comprise computation chip; phase current sampling circuit; the phase voltage sample circuit; central processor CPU; also comprise leakage current sample circuit and low-voltage circuit breaker; described leakage current sample circuit electrically connects described computation chip; described computation chip and central processor CPU electrically connect mutually; described central processor CPU electrically connects described low-voltage circuit breaker through a tripping operation output interface, and described low-voltage circuit breaker electrically connects described central processor CPU through a state acquisition interface.
Preferably, also comprise communication interface, communication module, long-range main website, described communication interface is electrically connected mutually with described central processor CPU, communication module respectively, adopts data communication protocol mutually to carry out communication between described long-range main website and the communication module.
Preferably, also comprise communication interface, communication module, concentrator, long-range main website, described communication interface adopts respectively data communication protocol mutually to carry out communication respectively and between described central processor CPU, described long-range main website and concentrator, described concentrator and the communication module.
Preferably, described low-voltage circuit breaker comprises shunt release and auxiliary contact, and described tripping operation output interface electrically connects shunt release, and described auxiliary contact electrically connects the state acquisition interface.
Preferably, described leakage current sample circuit comprises the leakage current pick-up transducers.
Further, also comprise keyboard, display screen, audible-visual annunciator, described keyboard electrically connects described central processor CPU, and described central processor CPU electrically connects respectively described display screen, audible-visual annunciator.Described display screen is used for showing electric weight, the electricity charge, power, table meter fault, leakage current, leak current fault alarm event information, earth leakage protection action event information; Described audible-visual annunciator is used for the information of prompting electric energy meter operating condition, communications status, electric energy meter abnormality and leak current fault.
Further, described data communication protocol carries out function in the communication protocol of " power consumer power information acquisition system " and technical manual and expands, and the agreement after the expansion realizes backward compatible acquisition system and equipment, common user communication passage.
Further, described central processor CPU and a clock module electrically connect mutually.
Further, described central processor CPU and a data-carrier store electrically connect mutually.
Compared with prior art, the invention has the beneficial effects as follows: the intelligent electric energy meter that 1, has electric leakage remote monitoring and defencive function, both having belonged to intelligent electric energy meter, and also belonged to Intelligent electric leakage monitoring and protecting device, is a kind of novel intelligent terminal for the low-voltage intelligent electrical network; 2, only change among a small circle at the intelligent electric energy meter basis a small amount of element of increase with to circuit, just can realize the function of intelligent electric meter and Intelligent electric leakage monitoring and protecting device two aspects, greatly reduce the device fabrication cost; 3, compatible communication facilities, communication protocol and the main website of system of power supply enterprise's power information acquisition system, expansion by communication protocol and system's Master Station Software, do not increasing in other specialized equipment input situation, can realize power consumer electric leakage remote monitoring; 4, the electric leakage situation that power supply enterprise can the overall monitor power consumer is in time found and is got rid of leak current fault, improves power supply reliability, reduces electric energy loss, reduces the loss of personal property that causes because of electric leakage; 5, improve the function of opposing electricity-stealing of intelligent electric meter, power supply enterprise can in time find and prevent some power consumer electricity filching behaviors, reduces the economic loss that causes because of stealing.
Description of drawings
Fig. 1 is the circuit structure block diagram of the embodiment of the invention one;
Fig. 2 is the circuit structure block diagram of the embodiment of the invention two;
Fig. 3 is split type assembly model synoptic diagram of the present invention;
Fig. 4 is monoblock type assembly model synoptic diagram of the present invention;
Description of reference numerals: 1, computation chip; 2, leakage current sample circuit; 3, phase current sampling circuit; 4, phase voltage sample circuit; 5, tripping operation output interface; 6, state acquisition interface; 7, low-voltage circuit breaker; 8, communication interface; 9, communication module; 10, data-carrier store; 11, clock module; 12, central processor CPU; 13, audible-visual annunciator; 14, display screen; 15, keyboard; 16, long-range main website; 17, concentrator.
Embodiment
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described in further detail.
Such as Fig. 1; shown in Figure 2; a kind of intelligent electric energy meter with electric leakage remote monitoring and defencive function; comprise computation chip 1; phase current sampling circuit 3; phase voltage sample circuit 4; central processor CPU 12; also comprise leakage current sample circuit 2 and low-voltage circuit breaker 7; described leakage current sample circuit 2 electrically connects described computation chip 1; described computation chip 1 electrically connects mutually with central processor CPU 12; described central processor CPU 12 electrically connects described low-voltage circuit breaker 7 through a tripping operation output interface 5, and described low-voltage circuit breaker 7 electrically connects described central processor CPU 12 through a state acquisition interface 6.Described leakage current sample circuit 2 comprises the leakage current pick-up transducers.
Also comprise communication interface 8, communication module 9, keyboard 15, display screen 14, audible-visual annunciator 13, described communication interface 8 is electrically connected mutually with described central processor CPU 12, communication module 9 respectively, the described central processor CPU 12 of described keyboard 15 accesses, described central processor CPU 12 electrically connects respectively described display screen 14, audible-visual annunciator 13.Described central processor CPU 12 and a clock module 11 electrically connect mutually.Described central processor CPU 12 and a data-carrier store 10 electrically connect mutually.
The present invention presses the difference of the connected mode of intelligent electric energy meter nucleus module exchanges data, and two kinds of embodiments are arranged:
Mode one: as shown in Figure 1, the communication interface 8 of nucleus module is electrically connected mutually with central processor CPU 12, communication module 9 respectively, adopts data communication protocol mutually to carry out communication between long-range main website 16 and the communication module 9.
Mode two: as shown in Figure 2, also comprise concentrator 17, adopt respectively data communication protocol mutually to carry out communication between the communication module 9 of long-range main website 16 and concentrator 17, concentrator 17 and nucleus module.Concentrator 17 is collected the data of each acquisition terminal or electric energy meter, and stores, and can realize simultaneously that electric energy meter and power information gather the exchanges data of main website or hand-held intelligent terminal equipment.
The present invention has two kinds of assembly models by the installation site of topworks's (being low-voltage circuit breaker) of earth leakage protection action:
Pattern one: low-voltage circuit breaker is built-in.As shown in Figure 3; set up a zero sequence current mutual inductor in intelligent electric energy meter inside; in the close inlet wire connection terminal position of intelligent electric energy meter with phase line; zero line passes zero sequence current mutual inductor; near outlet connection terminal position low-voltage circuit breaker 7 series connection access electrical network phase line and zero lines; the leakage current sample circuit 2 of the secondary circuit access intelligent electric meter nucleus module of zero sequence current mutual inductor gathers terminal; quantity of state acquisition interface 6 input terminals of the auxiliary contact access intelligent electric meter nucleus module of isolating switch 7 are used for deciliter position of monitoring breaker, and tripping operation output interface 5 terminals of breaker shunt release access intelligent electric meter nucleus module are realized trip protection control.Pattern one exemplifies be function of the present invention at the mode of connection of single-phase intelligent ammeter, for three-phase intelligent ammeter, its connection principle is constant, but needs to select the three-phase low-voltage isolating switch as earth leakage protection topworks.Be conserve space and cost, can select only to cut-off the low-voltage circuit breaker of phase line type, also have identical effect, but in the situation of ammeter zero line and phase line wiring error, just do not have earth leakage protective effect.The advantage of scheme one is to install simply; if intelligent electric meter and higher level's communication mode are the power carrier modes; method and the ordinary electric meter of its access electrical network are in full accord, only phase line, the zero line of low-voltage circuit line need be accessed respectively respective terminal and can realize described electric leakage remote monitoring defencive function.Its shortcoming is that the low-voltage circuit breaker repair and replacement are inconvenient.
Pattern two: low-voltage circuit breaker external.As shown in Figure 4, low-voltage circuit breaker 7 installation sites are moved on to the intelligent electric meter outside, intelligent electric energy meter is identical with mode of connection and Fig. 3 between the low-voltage circuit breaker 7, with major loop, control signal loop, state detection signal return wire one by one correspondence be connected.The advantage of pattern two is that the low-voltage circuit breaker repair and replacement are more convenient.Shortcoming is that installation and connection is slightly aobvious complicated, and control signal wire, state detection signal line are all received the low-voltage circuit breaker respective terminal from the intelligent electric meter terminal in addition, need to consider to prevent the problem that connecting line is destroyed.
Leakage current sample circuit 2 is responsible for low-voltage leakage electric current AC analogue signal is converted to digital signal, and imports the leakage current digital signal into computation chip 1 and carry out data and process.Most important element is the leakage current pick-up transducers in the leakage current sample circuit 2, the leakage current pick-up transducers is the AC analogue signal conversion element of leakage current, with the line electrical leakage current signal by a certain percentage relationship conversion be to be suitable for the AC signal that the leakage current sample circuit is processed, leakage current sample circuit 2 will leak electricity and output to computation chip 1 after the AC analogue signal is converted to digital signal, carry out the leakage current digital signal processing by computation chip 1.Phase current sampling circuit 3, phase voltage sample circuit 4 are converted to respectively the digital signal that proper measurement chip 1 gathers with phase current, the phase voltage AC analogue signal of three-phase or single-phase low-voltage circuit, and import voltage, current digital signal into computation chip 1 and carry out data and process, form the measurement data such as electric current, voltage, electric power, electric weight.Computation chip 1 is a kind of digital signal processing (Digital Singnal Processing that the electric signals such as electric energy metrical and voltage, electric current are processed that is specifically designed to, be called for short DSP) chip, among the present invention, computation chip 1 not only is responsible for phase current, phase voltage digital signal are converted to power and electric weight by calculation process, also be responsible for the leakage current digital signal is converted to the leakage current effective value by calculation process, and related data be stored in the working storage of computation chip 1.Central processor CPU 12 is core parts of intelligent electric energy meter; the general embedded microprocessor that adopts; that intelligent electric energy meter is realized that Parameters of Earth-Leakage Protection is adjusted, leaked electricity and judged and send the electric leakage Intelligent treatment core parts of instruction, and the tasks such as responsible data parameters storage administration, peripheral hardware control and Control on Communication.Data-carrier store 10 also is used for storage leakage current data, parameter and event information except being used for the data such as storage of electrical energy metering, charging and table meter event.Tripping operation output interface 5 is used for realizing the tripping operation control to low-voltage circuit breaker 7 to low-voltage circuit breaker 7 output tripping operation control wave or level signals.State acquisition interface 6 is responsible for gathering the divide-shut brake location status amount of low-voltage circuit breaker 7.Communication interface 8 and communication module 9 is responsible for communicating by letter of intelligent electric energy meters and the intelligent terminals such as concentrator 17, long-range main website 16, on-the-spot portable data acquisition PDA.Clock module 11 is timing devices, and carries lithium battery, is used for the independent timing of intelligent electric energy meter, and guarantees intelligent electric energy meter still accurately timing when outage, with the accuracy of true electric leakage information time of origin record.Keyboard 15, display screen 14, audible-visual annunciator 13 are the input-output apparatus of the man-machine interaction of intelligent electric energy meter, are responsible for leakage function debugging, parameter tuning, running status and leakage-current alarm, the demonstration of electric leakage information.Low-voltage circuit breaker 7 is a kind of low-voltage circuit breakers with shunt release and auxiliary contact.The effect of shunt release is a kind of contents of realizing low-voltage circuit breaker 7 is carried out sub-switching operation as intelligent electric energy meter, when intelligent electric energy meter tripping operation output interface 5 output sub-gate signals, just connect the shunt opening trip coil power supply, handle low-voltage circuit breaker 7 separating brakes, auxiliary contact is a kind of contents that low-voltage circuit breaker 7 is used for auxiliary judgment divide-shut brake position, the moving contact interlock of it and low-voltage circuit breaker 7 is responsible for to the divide-shut brake position state signal of intelligent electric energy meter feedback low-voltage circuit breaker 7.Low-voltage circuit breaker 7 is that the shunt opening trip coil of low-voltage circuit breaker 7, auxiliary contact are connected with tripping operation output interface 5, the state acquisition interface 6 of intelligent electric energy meter respectively for the electrical control equipment that cuts off and recover user load.Among the present invention, low-voltage circuit breaker 7 is responsible for disconnecting as required leak current fault point or fault power consumer when electric leakage occurs.Concentrator 17 refers to collect the data of each acquisition terminal or electric energy meter, and process storage, energy and power information collection main website or handheld device are carried out the equipment of exchanges data simultaneously, among the present invention, concentrator 17 also is responsible for storage and the forwarding of intelligent electric meter electric leakage controlling run data, parameter, event.Long-range main website 16 refers to power information acquisition system main website.
Wherein, according to leakage current acquisition principle and computing formula, take the single-phase intelligent ammeter as example, when occur to touch, during leak current fault, the phasor of phase line and neutral line current and be not equal to zero, namely
In the formula
Be phase current,
Be neutral line current,
Be leakage current.
Leakage current pick-up transducers in the leakage current sample circuit 2 can be divided into the synthetic acquisition method of leakage current acquisition method, electric current filtrator acquisition method and mathematics according to the difference that gathers embodiment.
The zero sequence current mutual inductor method: install a zero sequence current mutual inductor additional in intelligent electric energy meter inside, phase line, zero line jointly pass zero sequence current mutual inductor as the primary circuit, the leakage current sample circuit of the secondary circuit of zero sequence current mutual inductor access.
Electric current filtrator acquisition method: phase line and zero line in intelligent electric energy meter inside install respectively a current transformer that electrical specification is identical additional, phase line, zero line pass respectively separately current transformer as the primary circuit, the secondary circuit same polarity terminal of each mutual inductor is connected in parallel, namely consist of the leakage current filtrator, the current signal that flows through between latter two terminal in parallel is the leakage current AC signal, can be linked into the leakage current sample circuit.
Mathematics synthesizes acquisition method: be exactly install additional on the zero line of intelligent electric energy meter inside one with the current transformer of the identical electrical specification of phase line, and with the secondary circuit access current sampling circuit of current transformer.After phase line current signal and neutral line current signal gather through current sampling circuit, phase line, neutral line current instantaneous value are outputed to computation chip carry out the synthetic leakage current of mathematics superposition.
Above-mentioned three kinds of methods gather the used sensor element of leakage current, all applicable to adopting the current transformer class component as current sensor, for electric current filtrator acquisition method, the synthetic acquisition method of mathematics, its current sensor can also adopt the shunt resistance class component as current sensor.
Owing to increased the leakage current sample circuit that comprises the leakage current pick-up transducers at intelligent electric meter, by the phase line in the while monitoring intelligent electric energy meter and neutral line current size, can play the effect of strengthening intelligent electric meter function aspect anti-electricity-theft, can in time find and prevent for type electricity filching behaviors such as adopting transfer zero phase line stealing method, disconnected zero stealing method.
Principle of work of the present invention and the course of work are as follows:
Occur to touch when intelligent electric energy meter connects the user load lateral circuit, during electric leakage, the leakage current pick-up transducers of intelligent electric meter inside generates leakage current, the secondary circuit of leakage current pick-up transducers is input to after treatment A/D converter with leakage current signal and carries out the collection of leakage current analog signal figure, be digital signal with the leakage current analog signal conversion, and will and import the leakage current digital signal into computation chip 1 and carry out data and process.Form the data such as leakage current effective value, average data after the leakage current data that computation chip 1 transmits leakage current sample circuit 2 are processed through mathematical operation, and store data in the working storage of computation chip 1.Central processor CPU 12 constantly reads or receives the leakage current data from computation chip 1, and real-time leakage current data and earth leakage protection setting valve or warning setting valve compared, if leakage current value is greater than earth leakage protection setting valve or warning setting valve, then start earth leakage protection and warning subroutine, when satisfying earth leakage protection tripping operation trigger condition, central processor CPU 12 is exported tripping operation control wave or level signals by tripping operation output interface 5 to low-voltage circuit breaker 7, connect the shunt opening trip coil power supply of low-voltage circuit breaker 7, realize the earth leakage protection tripping operation; When satisfying the leakage-current alarm trigger condition, central processor CPU 12 is connected audible-visual annunciator 13 and is carried out leakage-current alarm to audible-visual annunciator 13 output control signals.Described earth leakage protection setting valve or warning setting valve are earth leakage protection and the alarm parameters by long-range main website 16 or 15 inputs of intelligent electric energy meter keyboard; parameter type comprises the parameters such as earth leakage protection setting valve, leakage-current alarm setting valve, earth leakage protection tripping operation delay time, the out-of-limit coefficient of restitution of leakage current, earth leakage protection tripping operation allow/forbid, leakage-current alarm allows/forbids, correlation parameter all is stored in the data-carrier store 10 of intelligent electric energy meter.
Earth leakage protection and warning subroutine are one section computer program codes that intelligent electric energy meter leaks electricity and judges and send trip protection/alarm command; its principle is that the various factors such as the size, fluctuation situation, duration according to leakage current carries out from motion tracking and intelligent decision, whether sends earth leakage protection tripping operation or leakage-current alarm instruction according to judged result and predetermined strategy decision.
Leakage-current alarm, earth leakage protection trip event that the power consumer that intelligent electric energy meter is monitored occurs because of electric leakage; and the implementation status of earth leakage protection or leakage-current alarm; form event message with timestamp by central processor CPU 12; with event message data writing storer 10, and dependent event information shown at display screen 14.After leakage-current alarm, earth leakage protection trip event occured, intelligent electric energy meter also uploaded to long-range main website 16 in real time with dependent event message and data, or uploads to concentrator 17, is forwarded to long-range main website 16 by concentrator 17 again.
If intelligent electric energy meter connects the power consumer leakage current value in normal range, the central processor CPU 12 of intelligent electric energy meter also constantly reads current leakage current value from data-carrier store 10 and carries out analytic statistics, form the statisticss such as interior leakage current mean value of unit interval, maximal value, minimum value, and show related data at display screen 14 as required, and regularly related data is uploaded to long-range main website 16 or concentrator 17, upload to again long-range main website 16 by concentrator 17, data storage and analysis so that long-range main website 16 leaks electricity.
Intelligent electric energy meter of the present invention; keep on original power information remote data transfer function basis; by the data communication protocol that adopts is improved in the expansion that the communication protocol of " power consumer power information acquisition system " and technical manual and related software carry out leakage current detect protection correlation function; need not to increase communication, main website hardware device; adopt shared communication medium, communication facilities and main website mode, just can realize long-range adjustment and the monitoring of user's earth leakage protection ruuning situation.
The data communication protocol of intelligent electric energy meter electric leakage remote monitoring protection correlation function of the present invention expands, and the data communication protocol that refers between intelligent electric energy meter and power information collection main website or intelligent electric energy meter and concentrator, concentrator and power information collection main website and hand-held intelligent terminal equipment expands.Wherein, communication protocol between intelligent electric meter and concentrator and the hand-held intelligent terminal equipment expands as the basis take DL/T645-2007 " multifunctional electric energy meter communication protocol ", and communication protocol expands as the basis take Q/GDW376.1-2009 " power consumer power information acquisition system communication protocol: main website and acquisition terminal communication protocol " between concentrator and the power information acquisition system main website.
The method of its realization is:
Telecommunication protocol to intelligent electric energy meter expands.Increase the data item such as real-time leakage current data, leakage current freezing data, leakage current curve data; Increase leakage current pick-up transducers multiplying power (as measurement point basic parameter item), leakage current thresholding (as earth leakage protection tripping operation action current setting valve), the leakage current upper limit (as leakage current off-limit alarm current setting), leakage current is got over the thresholding duration (earth leakage protection tripping operation delay time), leakage current is got over the upper limit duration (leakage-current alarm delay time), leakage current is got over the thresholding coefficient of restitution, leakage current is got over measurement point limit value parameter and the Protection parameters such as upper limit coefficient of restitution; Increase the earth leakage protection control parameters such as the earth leakage protection tripping operation allows/forbids, leakage-current alarm allows/forbids; Increase the event projects such as earth leakage protection trip event, electric leakage off-limit alarm event.For realizing the compatibility of main website and intelligent electric energy meter function, the concentrator that is connected with intelligent electric energy meter, the communication protocol of main website also communicate as stated above agreement and expand.
The adjustment of leakage current detect protection correlation parameter issues.Parameter management software function to main website is improved, and increases more thresholding duration, leakage current upper limit duration, leakage current thresholding coefficient of restitution, leakage current correlation parameter management functions of leaking electricity such as more upper limit coefficient of restitution, earth leakage protection tripping operation allow/forbid, the off-limit alarm of leak electricity allows/forbids more more of leakage current pick-up transducers multiplying power, leakage current thresholding, the leakage current upper limit, leakage current.After long-range main website 16 finishes the setting of correlation parameter, correlation parameter is formed message in batches or directly pass to one by one intelligent electric energy meter or under concentrator is transmitted, pass to intelligent electric energy meter, intelligent electric energy meter is verified, is resolved the parameter message that receives, and the parameter that long-range main website 16 is issued is stored in the data-carrier store 10.
The remote monitoring of intelligent electric energy meter leakage current detect protection.The real-time leakage current data that the intelligent electric energy meter timing automatic will collect, freeze the leakage current data, the leakage current curve data uploads to long-range main website 16 or uploads to long-range main website 16 through concentrator 17 in the data message mode, long-range main website 16 verifies the data message that receives, resolve, and with the data write into Databasce, carry out data exhibiting and demonstration by long-range main website 16.Intelligent electric energy meter detects that leakage current starts earth leakage protection after out-of-limit immediately and the warning subroutine is processed automatically; and form the earth leakage protection trip event or the off-limit alarm event message that leaks electricity; relevant event information is automatically uploaded to long-range main website 16 or uploads to long-range main website 16 through concentrator 17 in the event message mode, further processed by long-range main website 16.If long-range 16 monitor staff of main website need the current or historical leakage current detect protection relevant information of inquiry intelligent electric energy meter; can send electric leakage information from long-range main website 16 and call the survey order together; intelligent electric energy meter passes to long-range main website 16 with relevant information with message after receiving and calling the survey order together immediately automatically in form.
Low-voltage circuit breaker 7; its function is be used to switching on and off the power consumer power supply, playing the effect of control and protection in low-voltage circuit, in the present invention; low-voltage circuit breaker 7 is the earth leakage protective topworkies of intelligent electric energy meter, is responsible for disconnecting when electric leakage occurs the power consumer power supply.
Long-range main website 16 is telecommunication, monitoring, debugging and opertaing device, is responsible for intelligent electric meter is carried out data acquisition and management, and telemanagement is carried out in electric leakage data, control parameter and the protection control also be responsible for intelligent electric meter.It comprises master communication equipment, prepositive communication computer, main station system equipment and software etc., but implementation Adoption Network communication facilities, server, computing machine form main website, also can install communication version card additional in single computer, related software is installed is formed long-range main website; Long-range main website also can replace remote terminal, adopts the PDA palm PC that related software is installed and forms remote terminal.Need to prove that if do not need remote real-time monitoring, long-range main website or remote terminal are not necessary accessory of the present invention, as long as intelligent electric energy meter has been finished call parameter configuration and correct electrical connection, can normally move.
Although specifically show and introduced the present invention in conjunction with preferred embodiment; but the those skilled in the art should be understood that; within not breaking away from the spirit and scope of the present invention that appended claims limits; in the form and details the present invention is made a variety of changes, be protection scope of the present invention.
Claims (8)
1. intelligent electric energy meter with electric leakage remote monitoring and defencive function; comprise computation chip, phase current sampling circuit, phase voltage sample circuit, central processor CPU; it is characterized in that; also comprise leakage current sample circuit and low-voltage circuit breaker; described leakage current sample circuit electrically connects described computation chip; described computation chip and central processor CPU electrically connect mutually; described central processor CPU electrically connects described low-voltage circuit breaker through a tripping operation output interface, and described low-voltage circuit breaker electrically connects described central processor CPU through a state acquisition interface.
2. a kind of intelligent electric energy meter with electric leakage remote monitoring and defencive function according to claim 1; it is characterized in that; also comprise communication interface, communication module, long-range main website; described communication interface is electrically connected mutually with described central processor CPU, communication module respectively, adopts data communication protocol mutually to carry out communication between described long-range main website and the communication module.
3. a kind of intelligent electric energy meter with electric leakage remote monitoring and defencive function according to claim 1; it is characterized in that; also comprise communication interface, communication module, concentrator, long-range main website; described communication interface is electrically connected mutually with described central processor CPU, communication module respectively, adopts respectively data communication protocol mutually to carry out communication between described long-range main website and concentrator, described concentrator and the communication module.
4. a kind of intelligent electric energy meter with electric leakage remote monitoring and defencive function according to claim 1; it is characterized in that; described low-voltage circuit breaker comprises shunt release and auxiliary contact, and described tripping operation output interface electrically connects shunt release, and described auxiliary contact electrically connects the state acquisition interface.
5. a kind of intelligent electric energy meter with electric leakage remote monitoring and defencive function according to claim 1 is characterized in that described leakage current sample circuit comprises the leakage current pick-up transducers.
6. each described a kind of intelligent electric energy meter with electric leakage remote monitoring and defencive function according to claim 1-5; it is characterized in that; also comprise keyboard, display screen, audible-visual annunciator; described keyboard electrically connects described central processor CPU, and described central processor CPU electrically connects respectively described display screen, audible-visual annunciator.
7. each described a kind of intelligent electric energy meter with electric leakage remote monitoring and defencive function is characterized in that described central processor CPU and a clock module electrically connect mutually according to claim 1-5.
8. each described a kind of intelligent electric energy meter with electric leakage remote monitoring and defencive function is characterized in that described central processor CPU and a data-carrier store electrically connect mutually according to claim 1-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220302501 CN202886463U (en) | 2012-06-15 | 2012-06-26 | Intelligent electric energy meter with functions of electric leakage remote monitoring and protection |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210197165 | 2012-06-15 | ||
| CN201210197165.3 | 2012-06-15 | ||
| CN 201220302501 CN202886463U (en) | 2012-06-15 | 2012-06-26 | Intelligent electric energy meter with functions of electric leakage remote monitoring and protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202886463U true CN202886463U (en) | 2013-04-17 |
Family
ID=47055524
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220302501 Expired - Fee Related CN202886463U (en) | 2012-06-15 | 2012-06-26 | Intelligent electric energy meter with functions of electric leakage remote monitoring and protection |
| CN201210217937.5A Active CN102761173B (en) | 2012-06-15 | 2012-06-26 | Intelligent electric meter with functions of leakage remote monitoring and protection |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210217937.5A Active CN102761173B (en) | 2012-06-15 | 2012-06-26 | Intelligent electric meter with functions of leakage remote monitoring and protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN202886463U (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102761173A (en) * | 2012-06-15 | 2012-10-31 | 王成楷 | Intelligent electric meter with functions of leakage remote monitoring and protection |
| CN104218516A (en) * | 2013-05-31 | 2014-12-17 | 苏州工业园区新宏博通讯科技有限公司 | Intelligent power protection system preventing power from being stolen and method preventing power from being stolen |
| CN104977494A (en) * | 2014-04-01 | 2015-10-14 | 青岛海信日立空调系统有限公司 | Method for detecting electric leakage of electric appliance, and electric appliance |
| CN105353208A (en) * | 2015-11-13 | 2016-02-24 | 国网江西省电力科学研究院 | Electric energy metering and monitoring device for photovoltaic power generation |
| CN109375043A (en) * | 2018-09-30 | 2019-02-22 | 国网福建省电力有限公司南平供电公司 | One kind is visited one house after another detection system and its application method |
| CN110927441A (en) * | 2019-11-07 | 2020-03-27 | 安徽先兆科技有限公司 | Single-phase multi-loop electric comprehensive monitoring system |
| CN111033672A (en) * | 2017-08-18 | 2020-04-17 | 萨基姆通讯能源及电信联合股份公司 | System comprising an electricity meter and a circuit breaker |
| CN112684232A (en) * | 2021-02-01 | 2021-04-20 | 宁夏隆基宁光仪表股份有限公司 | Intelligent ammeter capable of preventing electricity theft |
| CN112710896A (en) * | 2020-12-24 | 2021-04-27 | 国网黑龙江省电力有限公司供电服务中心 | Multicore module smart metering ammeter |
| CN113030540A (en) * | 2021-03-01 | 2021-06-25 | 湖南大学 | Fundamental wave and harmonic wave electric energy bidirectional metering method of distributed new energy grid connection |
Families Citing this family (36)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103647252B (en) * | 2013-12-05 | 2016-03-16 | 江苏国星电器有限公司 | There is the leakage switch of FSK communication function |
| KR101555942B1 (en) * | 2014-06-26 | 2015-09-25 | 주식회사 인코어드 테크놀로지스 | Energy measuring unit compatible with circuit breaker in the distribution board |
| CN104268992A (en) * | 2014-10-20 | 2015-01-07 | 国网河南省电力公司漯河供电公司 | Intelligent ammeter device |
| CN104319194B (en) * | 2014-10-29 | 2016-10-12 | 天正集团有限公司 | A kind of ammeter earth leakage protective device |
| WO2016070676A1 (en) * | 2014-11-05 | 2016-05-12 | 江苏省电力公司常州供电公司 | Smart electric meter capable of measuring residual current |
| CN105699791A (en) * | 2014-11-24 | 2016-06-22 | 国网河南省电力公司平顶山供电公司 | DSP-based electric energy quality online monitor |
| CN104617662B (en) * | 2014-11-25 | 2017-04-05 | 青岛东软载波科技股份有限公司 | Intelligent electricity leakage protector and its control operation with radio communication and function of measuring |
| CN104569568A (en) * | 2015-01-13 | 2015-04-29 | 烟台智慧云谷云计算有限公司 | Current signal acquisition device based on 2.4G wireless network |
| CN104779595B (en) * | 2015-04-29 | 2018-06-08 | 国网河南省电力公司漯河供电公司 | Distribution two level earth leakage protective monitoring system |
| CN104808053A (en) * | 2015-05-18 | 2015-07-29 | 张新安 | Electronic watt hour meter |
| CN106292398A (en) * | 2015-05-27 | 2017-01-04 | 安徽圣享智能科技有限公司 | A kind of control device for box of electric energy meter |
| CN106328450A (en) * | 2015-07-02 | 2017-01-11 | 国网天津市电力公司 | Intelligent circuit breaker |
| CN105259465A (en) * | 2015-11-25 | 2016-01-20 | 国家电网公司 | Power distribution cabinet leakage detection device |
| CN108037334B (en) * | 2015-11-27 | 2020-10-27 | 浙江八达电子仪表有限公司 | Single-phase intelligent electric energy meter structure for collecting residual current |
| CN105790212A (en) * | 2016-04-27 | 2016-07-20 | 国网安徽省电力公司六安市叶集供电公司 | Meter-box intelligent residual-current circuit breaker |
| CN105866485A (en) * | 2016-04-28 | 2016-08-17 | 浙江豪顿电气有限公司 | Integrated intelligent electricity meter with earth leakage protection function |
| CN107664713A (en) * | 2016-07-28 | 2018-02-06 | 北海和思科技有限公司 | A kind of intelligent electric meter system |
| CN106253218A (en) * | 2016-08-19 | 2016-12-21 | 国网山东省电力公司昌邑市供电公司 | Control load intelligent breaker |
| CN106773933B (en) * | 2016-12-06 | 2019-03-08 | 中网联合(北京)能源服务有限公司 | Intelligent electric meter and its control method, device, system |
| CN106680550B (en) * | 2017-01-12 | 2019-07-30 | 中国计量大学 | With the accurate three-phase and four-line electric energy meter for crossing zero phase line switching |
| CN106655088B (en) * | 2017-03-14 | 2019-03-05 | 中北大学 | A kind of Intelligent protection switch |
| CN107192976A (en) * | 2017-07-17 | 2017-09-22 | 国网重庆市电力公司电力科学研究院 | A kind of long-distance intelligent ammeter trip signal detection method and system |
| CN107195510A (en) * | 2017-07-24 | 2017-09-22 | 罗格朗低压电器（无锡）有限公司 | Using the residual current circuit breaker of forward type zero sequence current mutual inductor |
| CN109546746A (en) * | 2017-09-22 | 2019-03-29 | 国网湖南省电力公司 | Monitor for electricity use and monitoring method |
| CN107732869A (en) * | 2017-11-17 | 2018-02-23 | 国网山东省电力公司淄博供电公司 | Height is for low meter spatial load forecasting engineering trip switch |
| CN108181502A (en) * | 2017-12-27 | 2018-06-19 | 上海贝岭股份有限公司 | Electric energy computation chip and electric energy metering device |
| CN108181536A (en) * | 2018-01-24 | 2018-06-19 | 宁波大家小家网络科技有限公司 | A kind of intelligent monitor system for single-phase residential electricity consumption |
| CN109031024B (en) * | 2018-08-17 | 2024-07-26 | 国网江苏省电力有限公司盐城供电分公司 | Electric leakage detection system and detection method based on power grid |
| CN109596873B (en) * | 2018-12-05 | 2021-04-20 | 合肥能安科技有限公司 | Smart electric meter with early warning function |
| CN110045166A (en) * | 2019-04-10 | 2019-07-23 | 珠海优特电力科技股份有限公司 | Ammeter, the control method of ammeter and readable storage medium storing program for executing |
| CN110556919A (en) * | 2019-08-12 | 2019-12-10 | 浙江恒业电子有限公司 | NB-IoT-based network distribution system with residual current detection function and terminal |
| CN113395666B (en) * | 2020-03-13 | 2022-09-02 | 国家电网有限公司 | Method and system for first pairing of Bluetooth circuit breaker and electric energy meter |
| CN111711277A (en) * | 2020-07-29 | 2020-09-25 | 天津利昂科技发展有限公司 | Intelligent power utilization module |
| CN111929486B (en) * | 2020-09-14 | 2021-01-12 | 南京奥通智能科技有限公司 | Single-loop wide-range voltage measurement system and measurement method |
| CN113160539A (en) * | 2021-04-16 | 2021-07-23 | 国网四川省电力公司攀枝花供电公司 | Low-voltage user electricity consumption information acquisition system and method |
| CN114113730A (en) * | 2021-11-22 | 2022-03-01 | 国网江苏省电力有限公司连云港供电分公司 | System and method for detecting wrong wiring of intelligent electric energy metering box |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3231374B2 (en) * | 1991-12-26 | 2001-11-19 | 株式会社日立製作所 | Earth leakage breaker |
| CN2847304Y (en) * | 2005-08-24 | 2006-12-13 | 武汉盛帆电子有限公司 | Three phase electronic leakage and electricity stealing detecting electric energy meter |
| CN201781262U (en) * | 2009-12-31 | 2011-03-30 | 嘉兴市永信电子有限公司 | Intelligent electronic electric leakage protector |
| CN201845049U (en) * | 2010-02-05 | 2011-05-25 | 吴文忠 | Bus-carrier intelligent electricity meter |
| CN201876483U (en) * | 2010-08-29 | 2011-06-22 | 飞跃联合科技集团有限公司 | Intelligent single-phase charge control electric energy meter |
| CN202886463U (en) * | 2012-06-15 | 2013-04-17 | 王成楷 | Intelligent electric energy meter with functions of electric leakage remote monitoring and protection |
-
2012
- 2012-06-26 CN CN 201220302501 patent/CN202886463U/en not_active Expired - Fee Related
- 2012-06-26 CN CN201210217937.5A patent/CN102761173B/en active Active
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102761173B (en) * | 2012-06-15 | 2014-09-03 | 王成楷 | Intelligent electric meter with functions of leakage remote monitoring and protection |
| CN102761173A (en) * | 2012-06-15 | 2012-10-31 | 王成楷 | Intelligent electric meter with functions of leakage remote monitoring and protection |
| CN104218516A (en) * | 2013-05-31 | 2014-12-17 | 苏州工业园区新宏博通讯科技有限公司 | Intelligent power protection system preventing power from being stolen and method preventing power from being stolen |
| CN104977494A (en) * | 2014-04-01 | 2015-10-14 | 青岛海信日立空调系统有限公司 | Method for detecting electric leakage of electric appliance, and electric appliance |
| CN104977494B (en) * | 2014-04-01 | 2018-01-09 | 青岛海信日立空调系统有限公司 | A kind of method and electric equipment for detecting electrical leakage |
| CN105353208A (en) * | 2015-11-13 | 2016-02-24 | 国网江西省电力科学研究院 | Electric energy metering and monitoring device for photovoltaic power generation |
| CN111033672A (en) * | 2017-08-18 | 2020-04-17 | 萨基姆通讯能源及电信联合股份公司 | System comprising an electricity meter and a circuit breaker |
| CN109375043A (en) * | 2018-09-30 | 2019-02-22 | 国网福建省电力有限公司南平供电公司 | One kind is visited one house after another detection system and its application method |
| CN110927441A (en) * | 2019-11-07 | 2020-03-27 | 安徽先兆科技有限公司 | Single-phase multi-loop electric comprehensive monitoring system |
| CN112710896A (en) * | 2020-12-24 | 2021-04-27 | 国网黑龙江省电力有限公司供电服务中心 | Multicore module smart metering ammeter |
| CN112684232A (en) * | 2021-02-01 | 2021-04-20 | 宁夏隆基宁光仪表股份有限公司 | Intelligent ammeter capable of preventing electricity theft |
| CN112684232B (en) * | 2021-02-01 | 2022-03-25 | 宁夏隆基宁光仪表股份有限公司 | Intelligent ammeter capable of preventing electricity theft |
| CN113030540A (en) * | 2021-03-01 | 2021-06-25 | 湖南大学 | Fundamental wave and harmonic wave electric energy bidirectional metering method of distributed new energy grid connection |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102761173B (en) | 2014-09-03 |
| CN102761173A (en) | 2012-10-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202886463U (en) | Intelligent electric energy meter with functions of electric leakage remote monitoring and protection | |
| CN102830255B (en) | A kind of intelligent electric energy meter with electricity consumption malfunction monitoring defencive function | |
| CN202948040U (en) | Intelligent electric energy meter having power failure monitoring and protection functions | |
| CN201018284Y (en) | Economically intelligent synthetic power distribution unit | |
| CN104283319A (en) | Intelligent distribution transformer terminal | |
| CN201352233Y (en) | Three-phase multifunctional electric energy meter with power carrier communication | |
| CN102879661A (en) | Method and system for detecting distribution network automatic terminal | |
| CN112557714A (en) | Multi-core modular intelligent electric energy meter | |
| CN202693653U (en) | Single-phase fee control intelligent electric energy meter | |
| CN201811983U (en) | Collection terminal device of special transformer | |
| CN205160090U (en) | Incessant little electric wire netting grid -connected interface integrated device of stable state has | |
| CN203445694U (en) | Intelligent feeder terminal unit | |
| CN201518049U (en) | Distribution transformer monitoring metering terminal | |
| CN112557789A (en) | Self-adaptive distributed intelligent test system for distribution automation terminal | |
| CN200996970Y (en) | Charge-evasion preventer for comparing high-voltage end and low-voltage end quantity | |
| CN106909104A (en) | A kind of intelligent prepayment control system | |
| CN218498873U (en) | Intelligent movement power protection terminal | |
| Sui et al. | An AMI based measurement and control system in smart distribution grid | |
| CN209911433U (en) | Electric energy meter with automatic temperature control and intelligent load identification functions | |
| CN203416050U (en) | Transformer room low-voltage power supply remote real-time monitoring apparatus | |
| CN203166487U (en) | Digital low voltage line protector | |
| CN203368143U (en) | Low-voltage distribution integrated monitoring device | |
| CN204287858U (en) | A kind of intelligent agriculture row table | |
| CN202503362U (en) | Distribution terminal unit integrating measurement, control and protection for intelligent distribution network | |
| CN210323193U (en) | Intelligent electric energy remote metering system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: STATE GRID CORPORATION OF CHINA Free format text: FORMER OWNER: WANG CHENGKAI Effective date: 20140128 Owner name: STATE GRID FUJIAN ELECTRIC POWER CO., LTD. WANG CH Effective date: 20140128 |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 362300 QUANZHOU, FUJIAN PROVINCE TO: 100031 XICHENG, BEIJING |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20140128 Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Patentee after: State Grid Corporation of China Patentee after: State Grid Fujian Electric Power Co., Ltd. Patentee after: Wang Chengkai Patentee after: STATE GRID FUJIAN NAN'AN POWER SUPPLY CO., LTD. Address before: 362300, 188 Xin Hua Xin Street, Nanan, Fujian, Quanzhou Patentee before: Wang Chengkai |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130417 Termination date: 20190626 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |