CN113178941A - Standby power supply system for intelligent electric energy meter - Google Patents
Standby power supply system for intelligent electric energy meter Download PDFInfo
- Publication number
- CN113178941A CN113178941A CN202110475859.8A CN202110475859A CN113178941A CN 113178941 A CN113178941 A CN 113178941A CN 202110475859 A CN202110475859 A CN 202110475859A CN 113178941 A CN113178941 A CN 113178941A
- Authority
- CN
- China
- Prior art keywords
- unit
- power supply
- signal
- control unit
- switching
- 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.)
- Pending
Links
- 238000004891 communication Methods 0.000 claims abstract description 39
- 238000001514 detection method Methods 0.000 claims abstract description 22
- 230000002159 abnormal effect Effects 0.000 claims description 11
- 238000012544 monitoring process Methods 0.000 claims description 10
- 230000005856 abnormality Effects 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
Landscapes
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The invention provides a standby power supply system for an intelligent electric energy meter, which comprises: the device comprises a control unit, a communication unit, a power supply unit, a clock unit, a standby power supply unit, a switch loop unit and a voltage detection unit; the control unit is respectively in signal connection with the communication unit, the clock unit, the switch loop unit and the voltage detection unit, the voltage detection unit is in signal connection with the switch loop unit, the power supply unit is respectively in electric connection with the control unit and the switch loop unit, the standby power supply unit is respectively in electric connection with the control unit and the switch loop unit, and the switch loop unit is respectively in electric connection with the clock unit and the communication unit. The intelligent electric energy meter can find the power supply abnormality of the switch loop unit in time and instantly switch the standby power supply, thereby ensuring the communication function of the intelligent electric energy meter in the power-off state and avoiding the time abnormality phenomenon of the clock after the power grid recovers the power supply.
Description
Technical Field
The invention relates to the technical field of electric power, in particular to a standby power supply system for an intelligent electric energy meter.
Background
The intelligent electric energy meter is used as an inlet interface of a power grid and widely applied to electric energy metering, and new energy such as solar energy, wind energy and the like is fed back to the power grid through the intelligent electric energy meter and is connected with the power grid in parallel, so that the metering timeliness and accuracy of the intelligent electric energy meter are very important. At present, a battery is arranged in an intelligent electric energy meter used in the market and used for supplying power to a clock loop in a power-off state so as to ensure that the clock of the electric energy meter is correct. Due to the fact that the service life of the battery is limited, the failure rate is high, and the electric energy meter clock is abnormal in time after the power grid recovers power supply. Because the electric energy meter is packaged when leaving the factory, the battery cannot be replaced after the fault, and inconvenience is caused. The battery of the intelligent meter is only used for maintaining the running of the clock loop, and the communication loop has no power supply, so that the remote communication cannot be realized.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide a backup power supply system for an intelligent electric energy meter.
In order to achieve the purpose, the invention is realized by the following technical scheme: a backup power supply system for a smart power meter, comprising: the device comprises a control unit, a communication unit, a power supply unit, a clock unit, a standby power supply unit, a switch loop unit and a voltage detection unit; the control unit is respectively in signal connection with the communication unit, the clock unit, the switch loop unit and the voltage detection unit, the voltage detection unit is in signal connection with the switch loop unit, the power supply unit is respectively in electric connection with the control unit and the switch loop unit, the standby power supply unit is respectively in electric connection with the control unit and the switch loop unit, and the switch loop unit is respectively in electric connection with the clock unit and the communication unit;
the control unit is used for sending a switching signal to the switching loop unit, and controlling the switching loop unit to supply power to the clock unit and the communication unit by using the power supply unit or the standby power supply unit;
and the voltage detection unit is used for monitoring the voltage of the switch loop unit in real time, converting the voltage value into a digital signal and sending the digital signal to the control unit.
Furthermore, a first switch module is arranged in the switch loop unit, the first switch module is electrically connected with the power supply unit and used for controlling the power supply unit to be switched on or switched off according to a control signal of the control unit, and the first switch module sends a current switching value signal to the control unit. The first switch module controls the power supply unit to be connected to the switch loop unit, and after the switch loop unit is closed, the power supply unit is adopted to supply power to the control unit, the clock unit and the communication unit.
Furthermore, a second switch module is arranged in the switch loop unit, the second switch module is electrically connected with the standby power supply unit and used for controlling the power supply unit to be switched on or switched off according to the control signal of the control unit, and the second switch module sends the current switching value signal to the control unit. And the second switch module controls the standby power supply unit to be connected into the switch loop unit, and after the standby power supply unit is closed, the standby power supply unit is adopted to supply power to the control unit, the clock unit and the communication unit.
Further, when the voltage detection unit monitors that the voltage of the switch loop unit is lower than a preset threshold value, the voltage value is converted into a digital signal and sent to the control unit, and meanwhile, a low-voltage alarm signal is sent to the control unit; and after receiving the low-voltage alarm signal, the control unit sends a control signal to the switch loop unit according to the power supply switching strategy to carry out power supply switching. The voltage detection unit realizes the working voltage monitoring and low-voltage early warning of the switch loop unit.
Further, the power switching strategy comprises:
the control unit respectively reads the current switching value signals of the first switch module and the second switch module, and if the switching value signal of the first switch module is a closing signal and the switching value signal of the second switch module is an opening signal; the control unit sends an open signal to the first switch module and simultaneously sends a close signal to the second switch module. The power supply switching strategy realizes instantaneous switching of the power supply when the power supply of the switch loop unit is insufficient, and solves the communication problem of the intelligent electric energy meter in the power-off state.
Further, the power switching strategy further comprises:
if the switching value signal of the first switching module is an opening signal and the switching value signal of the second switching module is a closing signal; the control unit generates a first alarm signal and sends the first alarm signal to the communication unit. At present, the system is stand-by power supply unit power supply state, can't carry out the power supply and switch, can think that intelligent ammeter is in the complete insufficient voltage state, need report insufficient voltage information through the network.
Further, if the switching value signal of the first switch module is a closing signal and the switching value signal of the second switch module is a closing signal; the control unit generates a second alarm signal and sends the second alarm signal to the communication unit. At this time, the system determines that the switch loop unit has a fault, and power switching cannot be performed, and abnormal information needs to be reported through the network.
Further, after receiving the first alarm signal, the communication unit converts the first alarm signal into power-shortage alarm information and sends the power-shortage alarm information to a preset monitoring server through a network; and after receiving the second alarm signal, the communication unit converts the second alarm signal into line abnormal alarm information and sends the line abnormal alarm information to the preset monitoring server through the network. The identification and the report of the alarm information are realized through the communication unit.
Furthermore, the standby power supply unit adopts a detachable battery pack, so that the replacement is convenient, and the problem that the battery cannot be replaced after the battery fails is effectively solved.
Compared with the prior art, the invention has the beneficial effects that: the invention provides a standby power supply system for an intelligent electric energy meter, which can find the power supply abnormality of a switch loop unit in time and instantly switch a standby power supply, ensures the communication function of the intelligent electric energy meter in a power failure state and avoids the time abnormality phenomenon of a clock after the power supply of a power grid is recovered. In addition, the invention has the function of circuit diagnosis, can find the fault and the hidden trouble of power supply of the switch loop unit in time and report the fault and the hidden trouble of power supply in time.
In addition, the invention has reliable design principle, simple structure and very wide application prospect.
Therefore, compared with the prior art, the invention has prominent substantive features and remarkable progress, and the beneficial effects of the implementation are also obvious.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a system block diagram of the present invention;
fig. 2 is a flow diagram of a method of power switching strategy of the present invention.
In the figure, 1 is a control unit, 2 is a communication unit, 3 is a power supply unit, 4 is a clock unit, 5 is a standby power supply unit, 6 is a switch loop unit, 7 is a voltage detection unit, 8 is a first switch module, and 9 is a second switch module.
Detailed Description
The following description of the embodiments of the present invention will be made with reference to the accompanying drawings.
A backup power supply system for an intelligent electric energy meter as shown in fig. 1, comprising: the device comprises a control unit 1, a communication unit 2, a power supply unit 3, a clock unit 4, a standby power supply unit 5, a switch loop unit 6 and a voltage detection unit 7. And the control unit 1 is used for sending a switching signal to the switching loop unit 6, and the switching loop unit 6 is controlled to supply power to the clock unit 4 and the communication unit 2 by using the power supply unit 3 or the standby power supply unit 5. And the voltage detection unit 7 is used for monitoring the voltage of the switch loop unit 6 in real time, converting the voltage value into a digital signal and sending the digital signal to the control unit 1.
The control unit 1 is respectively connected with the communication unit 2, the clock unit 4, the switch loop unit 6 and the voltage detection unit 7 through signals, the voltage detection unit 7 is connected with the switch loop unit 6 through signals, the power supply unit 3 is respectively and electrically connected with the control unit 1 and the switch loop unit 6, the standby power supply unit 5 is respectively and electrically connected with the control unit 1 and the switch loop unit 6, and the switch loop unit 6 is respectively and electrically connected with the clock unit 4 and the communication unit 2.
A first switch module 8 and a second switch module 9 are arranged in the switch circuit unit 6. The first switch module 8 is electrically connected to the power supply unit 3 and is configured to control the power supply unit 3 to be switched on or off according to a control signal of the control unit 1, and the first switch module 8 sends a current switching value signal to the control unit 1. The second switch module 9 is electrically connected to the standby power supply unit 5 and is configured to control the power supply unit 3 to be switched on or off according to a control signal of the control unit 1, and the second switch module 9 sends a current switching value signal to the control unit 1.
The standby power supply system monitors the voltage of the switch loop unit 6 in real time through the voltage detection unit 7 to determine whether to switch the power supply. When the voltage detection unit 7 monitors that the voltage of the switch loop unit 6 is lower than a preset threshold value, the voltage value is converted into a digital signal and is sent to the control unit 1, and meanwhile, a low-voltage alarm signal is sent to the control unit 1; after receiving the low-voltage alarm signal, the control unit 1 sends a control signal to the switch loop unit 6 according to the power switching strategy to perform power switching.
The standby power supply unit of the system adopts a detachable battery pack arranged outside the intelligent electric energy meter machine.
As shown in fig. 2, the adopted power switching strategy specifically includes the following steps:
s1: the control unit respectively reads the switching value signal K1 of the current first switching module and the switching value signal K2 of the second switching module.
S2: according to the specific values of K1 and K2, a control signal of the control unit is triggered and an alarm signal is sent out.
Specifically, the method comprises the following steps:
1. if K1=1 and K2=0, the switching value signal of the first switch module is a close signal and the switching value signal of the second switch module is an open signal; the control unit sends an open signal to the first switch module and simultaneously sends a close signal to the second switch module.
2. If K1=0 and K2=1, the switching value signal of the first switch module is an open signal and the switching value signal of the second switch module is a close signal; the control unit generates a first alarm signal and sends the first alarm signal to the communication unit. At this time, the system determines that the switch loop unit has a fault, and power switching cannot be performed, and abnormal information needs to be reported through the network.
3. If K1=1 and K2=1, the switching value signal of the first switch module is a close signal and the switching value signal of the second switch module is a close signal; the control unit generates a second alarm signal and sends the second alarm signal to the communication unit. At this time, the system determines that the switch loop unit is abnormal, and power supply switching cannot be performed, and abnormal information needs to be reported through the network.
S3: and the communication unit generates alarm information according to the alarm signal and finishes reporting.
Specifically, the method comprises the following steps:
after receiving the first alarm signal, the communication unit converts the first alarm signal into power-shortage alarm information and sends the power-shortage alarm information to a preset monitoring server through a network; and after receiving the second alarm signal, the communication unit converts the second alarm signal into line abnormal alarm information and sends the line abnormal alarm information to the preset monitoring server through the network.
In the embodiments provided by the present invention, it should be understood that the disclosed system, system and method can be implemented in other ways. For example, the above-described system embodiments are merely illustrative, and for example, the division of the units is only one logical functional division, and other divisions may be realized in practice, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, systems or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional modules in the embodiments of the present invention may be integrated into one processing unit, or each module may exist alone physically, or two or more modules are integrated into one unit.
Similarly, each processing unit in the embodiments of the present invention may be integrated into one functional module, or each processing unit may exist physically, or two or more processing units are integrated into one functional module.
The invention is further described with reference to the accompanying drawings and specific embodiments. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and these equivalents also fall within the scope of the present application.
Claims (8)
1. A backup power supply system for an intelligent electric energy meter, comprising: the device comprises a control unit, a communication unit, a power supply unit, a clock unit, a standby power supply unit, a switch loop unit and a voltage detection unit; the control unit is respectively in signal connection with the communication unit, the clock unit, the switch loop unit and the voltage detection unit, the voltage detection unit is in signal connection with the switch loop unit, the power supply unit is respectively in electric connection with the control unit and the switch loop unit, the standby power supply unit is respectively in electric connection with the control unit and the switch loop unit, and the switch loop unit is respectively in electric connection with the clock unit and the communication unit;
the control unit is used for sending a switching signal to the switching loop unit, and controlling the switching loop unit to supply power to the clock unit and the communication unit by using the power supply unit or the standby power supply unit;
and the voltage detection unit is used for monitoring the voltage of the switch loop unit in real time, converting the voltage value into a digital signal and sending the digital signal to the control unit.
2. The standby power supply system for the intelligent electric energy meter according to claim 1, wherein a first switch module is arranged in the switch loop unit, the first switch module is electrically connected with the power supply unit and used for controlling the power supply unit to be switched on or switched off according to a control signal of the control unit, and the first switch module sends a current switching value signal to the control unit.
3. The backup power supply system for intelligent electric energy meter according to claim 2, characterized in that said backup power supply system is configured to supply power to said intelligent electric energy meter
And a second switch module is arranged in the power supply device, is electrically connected with the standby power supply unit and is used for controlling the connection or disconnection of the power supply unit according to the control signal of the control unit, and sends the current switching value signal to the control unit.
4. The standby power supply system for the intelligent electric energy meter according to claim 3, wherein when the voltage detection unit monitors that the voltage of the switch loop unit is lower than a preset threshold value, the voltage detection unit converts the voltage value into a digital signal and sends the digital signal to the control unit, and simultaneously sends a low-voltage alarm signal to the control unit; and after receiving the low-voltage alarm signal, the control unit sends a control signal to the switch loop unit according to the power supply switching strategy to carry out power supply switching.
5. The backup power supply system for an intelligent electric energy meter according to claim 4, wherein the power supply switching strategy comprises:
the control unit respectively reads the current switching value signals of the first switch module and the second switch module, and if the switching value signal of the first switch module is a closing signal and the switching value signal of the second switch module is an opening signal; the control unit sends an open signal to the first switch module and simultaneously sends a close signal to the second switch module.
6. The backup power supply system for an intelligent electric energy meter according to claim 5, wherein the power switching strategy further comprises:
if the switching value signal of the first switching module is an opening signal and the switching value signal of the second switching module is a closing signal; the control unit generates a first alarm signal and sends the first alarm signal to the communication unit.
7. The backup power supply system for intelligent electric energy meter according to claim 6, wherein said power supply switching strategy comprises:
if the switching value signal of the first switching module is a closing signal and the switching value signal of the second switching module is a closing signal; the control unit generates a second alarm signal and sends the second alarm signal to the communication unit.
8. The standby power supply system for the intelligent electric energy meter according to claim 7, wherein the communication unit converts the first alarm signal into power shortage alarm information after receiving the first alarm signal, and sends the power shortage alarm information to a preset monitoring server through a network;
and after receiving the second alarm signal, the communication unit converts the second alarm signal into line abnormal alarm information and sends the line abnormal alarm information to the preset monitoring server through the network.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110475859.8A CN113178941A (en) | 2021-04-29 | 2021-04-29 | Standby power supply system for intelligent electric energy meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110475859.8A CN113178941A (en) | 2021-04-29 | 2021-04-29 | Standby power supply system for intelligent electric energy meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113178941A true CN113178941A (en) | 2021-07-27 |
Family
ID=76925410
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110475859.8A Pending CN113178941A (en) | 2021-04-29 | 2021-04-29 | Standby power supply system for intelligent electric energy meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113178941A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114301162A (en) * | 2022-01-05 | 2022-04-08 | 京东方科技集团股份有限公司 | Power supply system and power supply method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106157594A (en) * | 2016-08-12 | 2016-11-23 | 北京溢美四方软件技术有限公司 | The intelligent electric meter communication unit of a kind of built-in stand-by power supply and control method |
| CN107490706A (en) * | 2017-08-15 | 2017-12-19 | 国网重庆市电力公司电力科学研究院 | A kind of novel intelligent electric energy meter based on super capacitor power supply |
| CN108270283A (en) * | 2016-12-30 | 2018-07-10 | 孙麓轩 | Prepared auto restart control system |
| CN109633432A (en) * | 2019-01-10 | 2019-04-16 | 常熟开关制造有限公司(原常熟开关厂） | Automatic change-over failure modes diagnostic method, device and automatic change-over |
| CN110707809A (en) * | 2019-11-25 | 2020-01-17 | 国网新疆电力有限公司乌鲁木齐供电公司 | Automatic switching alarm device between independent UPS of transformer substation |
| US20210066959A1 (en) * | 2019-08-30 | 2021-03-04 | Schneider Electric It Corporation | Uninterruptible power system bypass switch control |
-
2021
- 2021-04-29 CN CN202110475859.8A patent/CN113178941A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106157594A (en) * | 2016-08-12 | 2016-11-23 | 北京溢美四方软件技术有限公司 | The intelligent electric meter communication unit of a kind of built-in stand-by power supply and control method |
| CN108270283A (en) * | 2016-12-30 | 2018-07-10 | 孙麓轩 | Prepared auto restart control system |
| CN107490706A (en) * | 2017-08-15 | 2017-12-19 | 国网重庆市电力公司电力科学研究院 | A kind of novel intelligent electric energy meter based on super capacitor power supply |
| CN109633432A (en) * | 2019-01-10 | 2019-04-16 | 常熟开关制造有限公司(原常熟开关厂） | Automatic change-over failure modes diagnostic method, device and automatic change-over |
| US20210066959A1 (en) * | 2019-08-30 | 2021-03-04 | Schneider Electric It Corporation | Uninterruptible power system bypass switch control |
| CN110707809A (en) * | 2019-11-25 | 2020-01-17 | 国网新疆电力有限公司乌鲁木齐供电公司 | Automatic switching alarm device between independent UPS of transformer substation |
Non-Patent Citations (1)
| Title |
|---|
| 齐伟 等: "《城市轨道交通通信与信号》", 31 January 2018 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114301162A (en) * | 2022-01-05 | 2022-04-08 | 京东方科技集团股份有限公司 | Power supply system and power supply method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102325149B (en) | Intelligent network remote terminal unit (RTU) system of electrified railway | |
| CN201466500U (en) | Multifunctional intelligent power distribution box | |
| CN209167449U (en) | Telegraph circuit in a kind of power failure applied to HPLC carrier communication module | |
| CN201414021Y (en) | Intelligent power distribution system for telecommunication room | |
| CN108565960A (en) | A kind of DTU distribution terminals super capacitor backup power system | |
| CN102931731A (en) | Integrated intelligent monitoring system applicable to substation direct-current power supply | |
| CN203135574U (en) | Intelligent monitoring terminal of distribution transformer | |
| CN102611196A (en) | 10KV power grid state monitoring and fault process automation system | |
| CN103529290A (en) | Three-phase intelligent meter capable of acquiring information of power distribution and power utilization | |
| CN113178941A (en) | Standby power supply system for intelligent electric energy meter | |
| CN103941193A (en) | Online monitoring system for storage battery set through mobile phone | |
| CN202127287U (en) | Automatic remote terminal of distribution line | |
| CN208806479U (en) | A kind of power distribution network ring network cabinet of automatic improving | |
| CN201717677U (en) | Distribution transformer failure monitoring terminal | |
| CN204465412U (en) | A kind of photovoltaic generating system intelligentized control method complete machine device | |
| CN214755720U (en) | Differentiation of 5G basic station is equipped with electric intelligent control equipment | |
| CN211209379U (en) | Distribution terminal full coverage area distributed self-healing system | |
| CN201234153Y (en) | DC electric power cabinet controller | |
| CN208571692U (en) | A kind of circuit reporting working power power fail warning automatically | |
| CN111799884A (en) | Power supply switching device for user metering and collecting terminal | |
| CN208638329U (en) | A kind of intelligent safety monitoring protection system for photovoltaic generating module | |
| CN101552487A (en) | Uninterrupted power supply for battery pack vulcanization prevention and online capacity measurement | |
| CN201629603U (en) | Battery monitoring management system based on uninterruptible switch power source | |
| CN221103050U (en) | Power distribution terminal power supply device | |
| CN212588141U (en) | Power supply switching device for user metering and collecting terminal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210727 |
|
| RJ01 | Rejection of invention patent application after publication |