CN116973704B - Switch equipment and cable line insulation fault monitoring system - Google Patents
Switch equipment and cable line insulation fault monitoring system Download PDFInfo
- Publication number
- CN116973704B CN116973704B CN202310955937.3A CN202310955937A CN116973704B CN 116973704 B CN116973704 B CN 116973704B CN 202310955937 A CN202310955937 A CN 202310955937A CN 116973704 B CN116973704 B CN 116973704B
- Authority
- CN
- China
- Prior art keywords
- gas sensor
- sensor
- equal
- data
- less
- 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.)
- Active
Links
- 238000009413 insulation Methods 0.000 title claims abstract description 55
- 238000012544 monitoring process Methods 0.000 title claims abstract description 51
- 238000012423 maintenance Methods 0.000 claims abstract description 23
- 238000004891 communication Methods 0.000 claims abstract description 14
- 230000005540 biological transmission Effects 0.000 claims abstract description 7
- 230000007613 environmental effect Effects 0.000 claims abstract description 4
- 239000011810 insulating material Substances 0.000 claims description 18
- 239000012774 insulation material Substances 0.000 claims description 12
- QVFWZNCVPCJQOP-UHFFFAOYSA-N chloralodol Chemical compound CC(O)(C)CC(C)OC(O)C(Cl)(Cl)Cl QVFWZNCVPCJQOP-UHFFFAOYSA-N 0.000 claims description 4
- 230000003287 optical effect Effects 0.000 claims description 4
- 238000009529 body temperature measurement Methods 0.000 claims description 3
- 239000004065 semiconductor Substances 0.000 claims description 3
- 230000008054 signal transmission Effects 0.000 claims description 3
- 239000007789 gas Substances 0.000 description 75
- 238000000034 method Methods 0.000 description 12
- 238000001514 detection method Methods 0.000 description 7
- 230000007547 defect Effects 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000012806 monitoring device Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 150000001299 aldehydes Chemical class 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- 150000001336 alkenes Chemical class 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- -1 cyclic siloxane compounds Chemical class 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 150000008282 halocarbons Chemical class 0.000 description 1
- 125000000623 heterocyclic group Chemical group 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 125000001997 phenyl group Chemical class [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0031—General constructional details of gas analysers, e.g. portable test equipment concerning the detector comprising two or more sensors, e.g. a sensor array
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0036—General constructional details of gas analysers, e.g. portable test equipment concerning the detector specially adapted to detect a particular component
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1272—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of cable, line or wire insulation, e.g. using partial discharge measurements
Landscapes
- Chemical & Material Sciences (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Food Science & Technology (AREA)
- Combustion & Propulsion (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Testing Relating To Insulation (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The invention is suitable for the technical field of electric power monitoring, and provides a switch device and a cable line insulation fault monitoring system, which comprises a host, a sensor unit, a server, a database and a data platform module; the host computer carries out data transmission with the sensor unit through wired or wireless communication, and the sensor unit is used for monitoring the environmental temperature and humidity and the gas concentration in real time and transmitting the monitored data to the host computer; the host computer is used for displaying the data value monitored by the sensor unit and uploading the data to the server of the server and the database, and storing the data in the database of the server and the database; the server and the database are also connected with the data platform module through a wireless network. The invention solves the problems of missing report and false report of the insulation fault monitoring by the existing monitoring means, reduces the workload of operation and maintenance of the switch equipment and the cable line, and improves the safety and stability of the operation of the power grid.
Description
Technical Field
The invention belongs to the technical field of power monitoring, and particularly relates to a switch device and a cable line insulation fault monitoring system.
Background
At present, electrical quantity monitoring is mainly adopted in research on monitoring insulation faults of switch equipment and cable lines, namely, sound, light, electromagnetic waves, current, voltage and temperature changes generated by partial discharge when the insulation faults occur are monitored, and whether the insulation faults occur or not is indirectly judged. The main monitoring method comprises a temperature measurement method, a pulse current method, an ultrahigh frequency method, a transient ground voltage method, an ultrasonic detection method and an optical detection method.
The existing monitoring method can monitor the occurrence of partial discharge to a certain extent, but is difficult to accurately judge the insulation defect conditions in the switch equipment and the cable line under the influence of the box body structure, the test time and the test position, the testers and the anti-interference capability of the equipment. And the existing monitoring method is aimed at monitoring partial discharge per se, and even if the occurrence of partial discharge is monitored, the insulation damage degree cannot be accurately estimated. And when the switch cabinet normally operates, corona discharge can occur in certain states, most of the discharge is that the metal tip discharges air and cannot damage insulation, if the existing monitoring means are adopted for monitoring, false alarm phenomenon can occur, namely, monitoring equipment alarms, and insulation damage does not occur after on-site investigation.
Therefore, in view of the above situation, there is an urgent need to develop a switchgear and a cable insulation fault monitoring system to overcome the shortcomings in the current practical application.
Disclosure of Invention
The embodiment of the invention aims to provide a switch device and a cable line insulation fault monitoring system, and aims to solve the problem that the existing monitoring means are inaccurate in insulation fault monitoring, namely the phenomena of missing report and false report occur, reduce the workload of operation and maintenance of the switch device and the cable line, and improve the safety and stability of power grid operation.
The embodiment of the invention is realized in such a way that the switch equipment and the cable line insulation fault monitoring system comprise a host, a sensor unit, a server, a database and a data platform module;
The host computer performs data transmission with the sensor unit through wired or wireless communication, and the sensor unit is used for monitoring the environmental temperature and humidity and the gas concentration in real time and transmitting the monitored data to the host computer;
The host computer is used for displaying the data value monitored by the sensor unit and uploading the data to the server of the server and the database, and storing the data in the database of the server and the database;
the server and the database are also connected with the data platform module through a wireless network.
According to a further technical scheme, the host and the sensor unit are connected in a wired mode through RS232 or RS485, or the host and the sensor unit are in signal transmission through 2.4G, zigbee or LoRa wireless communication modes.
According to a further technical scheme, the host comprises an embedded chip processor A, a 4G chip, a display screen, keys, an RS485 interface A, an external antenna interface and a power interface, wherein the embedded chip processor A is connected through an IO port and is used for controlling the 4G chip, the display screen, the keys and the RS485 interface A, the display screen is used for displaying data, the 4G chip is used for wireless transceiving functions between the host and a server, the keys are used for setting functions of the host, and the RS485 interface A is used for transceiving data between the RS485 interface A and a sensor unit and providing power for the sensor unit; the external antenna interface is connected with the 4G chip and is used for connecting an external antenna, and wireless signals are gained through the external antenna.
Further technical scheme, the sensor unit includes embedded chip processor B, RS interface B, temperature sensor, humidity transducer and gas sensor, embedded chip processor B passes through IO mouth and controls RS485 interface B, temperature sensor, humidity transducer and gas sensor, RS485 interface B passes through the wire and is connected with the RS485 interface A of host computer, RS485 interface B is used for acquireing the power and communicates with the host computer, temperature sensor and humidity transducer are used for monitoring temperature and humidity respectively, gas sensor includes G1 gas sensor, G2 gas sensor and G3 gas sensor, just G1 gas sensor, G2 gas sensor and G3 gas sensor are used for monitoring corresponding kind's gas concentration.
Further technical scheme, this switchgear and cable line insulation fault monitoring system, early warning value set up to tertiary early warning: the first level is a concerned value, which is defined as that the insulating material is slightly damaged, and the data needs to be continuously concerned, and the G1 gas sensor, the G2 gas sensor and the G3 gas sensor are respectively 20ppm, 30ppm and 30ppm; the second level is an operation and maintenance value, which is defined as that the insulating material is damaged and the damage can continuously develop, and an operation and maintenance plan is required to be made for maintenance in a short period, wherein the G1 gas sensor, the G2 gas sensor and the G3 gas sensor are respectively 40ppm, 60ppm and 60ppm; the third level is an emergency early warning value, which is defined as that the insulating material is seriously damaged and is required to be immediately subjected to on-site operation and maintenance, and the G1 gas sensor, the G2 gas sensor and the G3 gas sensor are respectively 80ppm, 120ppm and 120ppm;
When the G1 gas sensor is less than 20ppm and the G2 gas sensor is less than 30ppm and the G3 gas sensor is less than 30ppm, the insulation state is good;
When the G1 gas sensor is less than or equal to 20ppm and less than 40ppm or the G2 gas sensor is less than or equal to 30ppm and less than or equal to 60ppm or the G3 gas sensor is less than or equal to 30ppm and less than or equal to 60ppm, the insulating material is slightly damaged, and continuous attention is required to be paid to the data;
When G1 gas sensor is more than or equal to 40ppm and less than 80ppm or G2 gas sensor is more than or equal to 60ppm and less than or equal to 120ppm or G3 gas sensor is more than or equal to 60ppm and less than or equal to 120ppm, the insulation material is damaged and the damage can continuously develop, and an operation and maintenance plan is needed to be made in a short period of time for maintenance;
When the G1 gas sensor is more than or equal to 80ppm or the G2 gas sensor is more than or equal to 120ppm or the G3 gas sensor is more than or equal to 120ppm, the insulating material is seriously damaged, and the on-site operation, maintenance and overhaul are required immediately.
According to a further technical scheme, the ratio of the G1 gas sensor, the G2 gas sensor and the G3 gas sensor is adopted to determine that the insulation fault is an internal fault or an external fault, wherein the internal fault is defined as the insulation fault generated on the inner surface of the insulation material, and the external fault is defined as the insulation fault generated on the outer surface of the insulation material;
When the G2 gas sensor/G1 gas sensor is more than or equal to 3 and the G2 gas sensor/G3 gas sensor is more than or equal to 3, the insulation fault is an internal fault;
When the G2 gas sensor/G1 gas sensor < 3 or the G2 gas sensor/G3 gas sensor < 3, the insulation fault is an external fault.
According to a further technical scheme, the gas sensor is an electrochemical sensor, an optical sensor or a semiconductor sensor, the characteristic gas measuring range of the gas sensor is 0-1000 ppm, the resolution is 0.1ppm, the error is +/-5%, and the temperature compensation range is as follows: -40-70 ℃.
According to a further technical scheme, the temperature measurement range of the temperature sensor is-40-125 ℃, the resolution is 0.1 ℃, and the error is +/-0.2 ℃; the humidity measuring range of the humidity sensor is 0-100%, the resolution is 0.1%, and the error is +/-2%.
According to a further technical scheme, the host computer performs data transmission with the database through the 4G wireless network and the server.
According to a further technical scheme, the data platform module comprises data platform software which can log in at a mobile end or a fixed end through a network account number to check data and running states.
The switch equipment and the cable line insulation fault monitoring system provided by the embodiment of the invention can simultaneously monitor various characteristic gases on line, monitor and analyze the characteristic gas concentration change rule by a specific method, accurately evaluate the insulation state and the insulation material damage severity, early warn the insulation fault, make up the defects of the existing insulation monitoring equipment, and greatly reduce the phenomena of missing report and false report in the insulation monitoring process. The operating environment of the switch equipment and the cable line can be judged through temperature and humidity monitoring, meanwhile, temperature and humidity compensation can be carried out on the value of the gas sensor through an algorithm in the equipment, and the accuracy of a detection result is ensured.
Drawings
Fig. 1 is a block diagram of a switch device and a cable line insulation fault monitoring system according to an embodiment of the present invention;
fig. 2 is a block diagram of a host in a system for monitoring insulation faults of a switchgear and a cable line according to an embodiment of the present invention;
fig. 3 is a block diagram of a sensor unit in a system for monitoring insulation faults of a switchgear and a cable line according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Specific implementations of the invention are described in detail below in connection with specific embodiments.
The invention relates to a method for monitoring insulation faults of switch equipment and cable lines, which belongs to a chemical detection method based on the principle that when the electric equipment is subjected to partial discharge, an insulation material is degraded to generate volatile gas, and whether insulation damage occurs to the electric equipment is judged by detecting and analyzing the concentration and the components of the generated characteristic gas. The method is mainly applied to oil-filled equipment such as oil paper bushings of transformers, reactors, current transformers, voltage transformers and the like and GIS equipment at present, and the chemical detection method has the advantages of high detection speed, strong anti-interference performance, easiness in automation and the like. When the insulating defect occurs in the switch equipment and the cable line, the insulating material generates complex chemical reaction under the action of electron collision and high temperature to generate specific gas components, which mainly comprise organic and inorganic micromolecular substances, heterocyclic substances, ketone, grease, aldehyde, halogenated hydrocarbon, benzene compounds, alkane and alkene, chain and cyclic siloxane compounds. The insulation state inside the equipment is judged by monitoring the characteristic gas concentration, change rule and other decomposition characteristics generated by the decomposition of the insulation material.
As shown in fig. 1-3, a system for monitoring insulation faults of a switchgear and a cable line according to an embodiment of the present invention includes a host, a sensor unit, a server, a database, and a data platform module.
The host computer performs data transmission with the sensor unit through wired or wireless communication, and the sensor unit is used for monitoring the environmental temperature and humidity and the gas concentration in real time and transmitting the monitored data to the host computer; specific: the host computer and the sensor unit are connected in a wired mode through RS232 or RS485, and can also adopt wireless communication modes such as 2.4G, Z igbee or LoRa to carry out signal transmission, configuration is needed according to practical application, the wired communication can adopt the RS232 or RS485 mode to carry out communication according to the communication distance, and the wireless communication mode can adopt the wireless mode such as 2.4G, Z igbee or LoRa to carry out communication. Note that under the condition of strong electromagnetic interference, a wired mode is needed to perform communication so as to ensure the stability of communication.
The host computer is used for displaying the data value monitored by the sensor unit and uploading the data to the server of the server and the database, and storing the data in the database of the server and the database; specific: the host computer carries out data transmission with the database through the 4G wireless network and the server.
The server and the database are connected with the data platform module through a wireless network, and specifically: the data platform module comprises data platform software, and can log in at a mobile end or a fixed end through a network account to check data and running states.
As shown in fig. 2, as a preferred embodiment of the present invention, the host includes an embedded chip processor a, a 4G chip, a display screen, a key, an RS485 interface a, an external antenna interface and a power interface, where the embedded chip processor a is connected through an IO port and controls the 4G chip, the display screen, the key and the RS485 interface a, the display screen is used for data display, the 4G chip is used for wireless transceiving functions between the host and a server, the external antenna interface is connected with the 4G chip, the external antenna is connected to gain wireless signals, the key is used for host function setting, and the RS485 interface a is used for data transceiving between the sensor unit and providing power thereto; preferably, the host has seven RS485 interfaces a, which can connect and control seven sensor units simultaneously.
As shown in fig. 3, as a preferred embodiment of the present invention, the sensor unit includes an embedded chip processor B, RS B, a temperature sensor, a humidity sensor and a gas sensor, the embedded chip processor B is connected to and controls an RS485 interface B, the temperature sensor, the humidity sensor and the gas sensor through an IO port, the RS485 interface B is connected to an RS485 interface a of a host computer through a wire to obtain a power supply and communicate with the host computer, the temperature and humidity sensor monitors temperature and humidity, the gas sensor includes a G1 gas sensor, a G2 gas sensor and a G3 gas sensor (hereinafter referred to as G1, G2 and G3), and the G1 gas sensor, the G2 gas sensor and the G3 gas sensor are used to monitor the concentration of the corresponding gas.
The judgment basis of the insulation fault monitoring by the monitoring device is as follows:
The early warning value of the monitoring device is set to be three-level early warning, the first level is a concerned value, the first level is defined as that the insulating material is slightly damaged, the data are required to be continuously concerned, and G1, G2 and G3 are respectively 20ppm, 30ppm and 30ppm; the second level is an operation and maintenance value, which is defined as that the insulating material is damaged and the damage can continuously develop, an operation and maintenance plan is required to be made for maintenance in a short period, and G1, G2 and G3 are respectively 40ppm, 60ppm and 60ppm; the third level is an emergency early warning value, which is defined as that the insulating material is seriously damaged, and the on-site operation and maintenance are required to be immediately carried out, wherein G1, G2 and G3 are respectively 80ppm, 120ppm and 120ppm.
Namely, when G1 is less than 20ppm, G2 is less than 30ppm and G3 is less than 30ppm, the insulating state is good;
When G1 is more than or equal to 20ppm and less than 40ppm or G2 is more than or equal to 30ppm and less than or equal to 60ppm or G3 is more than or equal to 30ppm and less than or equal to 60ppm, the insulating material is slightly damaged, and continuous attention is required to be paid to the data;
When G1 is more than or equal to 40ppm and less than 80ppm or G2 is more than or equal to 60ppm and less than or equal to 120ppm or G3 is more than or equal to 60ppm and less than or equal to 120ppm, the insulating material is damaged and the damage can continuously develop, and an operation and maintenance plan is required to be made in a short period of time for maintenance;
G1 When the density of G2 is more than or equal to 80ppm or G2 is more than or equal to 120ppm or G3 is more than or equal to 120ppm, the insulating material is seriously damaged, and the on-site operation, maintenance and repair are required immediately.
The ratio of G1, G2, G3 can further determine that the insulation fault is an internal fault defined as an insulation fault occurring on the inner surface of the insulation material or an external fault defined as an insulation fault occurring on the outer surface of the insulation material.
When G2/G1 is more than or equal to 3 and G2/G3 is more than or equal to 3, the insulation fault is an internal fault;
when G2/G1 is less than 3 or G2/G3 is less than 3, the insulation fault is an external fault.
The gas sensor adopted by the invention can be an electrochemical sensor, an optical sensor or a semiconductor sensor, and the like, so long as the characteristic gas can be qualitatively and quantitatively analyzed, the measurement range of the characteristic gas is required to be 0-1000 ppm, the resolution is 0.1ppm, the error is +/-5%, and the temperature compensation range is as follows: -40-70 ℃. The temperature measuring range of the temperature sensor is-40 ℃ to 125 ℃, the resolution is 0.1 ℃, and the error is +/-0.2 ℃; the humidity measuring range of the humidity sensor is 0-100%, the resolution is 0.1%, and the error is +/-2%.
When the switch cabinet is used, the host computer and the sensor unit are fixed in the instrument room, wherein the sensor unit is fixed right above the threading hole of the secondary wire, the sensitivity of the gas sensors G1, G2 and G3 to gas monitoring can be ensured, and gas generated by degradation of insulating materials in the switch cabinet can be diffused to the instrument room through the threading hole of the secondary wire. The device adopts the power adapter to supply power, and power adapter inlet wire end inserts looped netowrk cabinet instrument room AC220V switch outlet line department, and power adapter outlet wire connection host computer power socket, the RS485 interface B of host computer and sensor unit is connected to the quad lead, and this kind of installation scheme can carry out electrified installation when equipment is applied to middle-high voltage switchgear.
When the cable line branch box is applied, the host computer and the sensor unit are fixed on the inner wall of the branch box, wherein the sensor unit is fixed above the inner wall of the branch box as far as possible and close to the top plate, and the sensitivity of the gas sensors G1, G2 and G3 to gas monitoring can be ensured. The device adopts an open type CT to supply power, the open type CT is installed to one of three phases of a cable A, B, C, voltage conversion is carried out through a power supply module, and DC12V is output as a power supply of the monitoring device. The power module outgoing line is connected with a host power socket, and the four-core wire is connected with an RS485 interface B of the host and the sensor unit.
The switch equipment and the cable line insulation fault monitoring system can simultaneously monitor various characteristic gases on line, monitor and analyze the concentration change rule of three characteristic gases (G1, G2 and G3) by a specific method, accurately evaluate the insulation state and the damage severity of the insulation material, early warn the insulation fault, make up the defects of the existing insulation monitoring equipment, and greatly reduce the phenomena of missing report and false report in the insulation monitoring process. The operating environment of the switch equipment and the cable line can be judged through temperature and humidity monitoring, meanwhile, temperature and humidity compensation can be carried out on the value of the gas sensor through an algorithm in the equipment, and the accuracy of a detection result is ensured.
The related circuits, electronic components and modules are all in the prior art, and can be completely implemented by those skilled in the art, and needless to say, the protection of the present invention does not relate to improvements of software and methods.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The foregoing examples illustrate only a few embodiments of the invention and are described in detail herein without thereby limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (3)
1. The system is characterized by comprising a host, a sensor unit, a server, a database and a data platform module;
The host computer performs data transmission with the sensor unit through wired or wireless communication, and the sensor unit is used for monitoring the environmental temperature and humidity and the gas concentration in real time and transmitting the monitored data to the host computer;
The host computer is used for displaying the data value monitored by the sensor unit and uploading the data to the server of the server and the database, and storing the data in the database of the server and the database;
the server and the database are also connected with the data platform module through a wireless network;
The host comprises an embedded chip processor A, a 4G chip, a display screen, keys, an RS485 interface A, an external antenna interface and a power interface; the embedded chip processor A is connected through an IO port and controls the 4G chip, the display screen, the keys and the RS485 interface A, the display screen is used for data display, the 4G chip is used for wireless receiving and transmitting functions between a host and a server, the keys are used for host function setting, and the RS485 interface A is used for receiving and transmitting data between the sensor unit and providing power supply for the sensor unit; the external antenna interface is connected with the 4G chip and is used for connecting an external antenna, and wireless signals are increased through the external antenna;
The sensor unit comprises an embedded chip processor B, RS interface B, a temperature sensor, a humidity sensor and a gas sensor; the embedded chip processor B is connected with the RS485 interface B through an IO port and controls the RS485 interface B, the temperature sensor, the humidity sensor and the gas sensor, the RS485 interface B is connected with the RS485 interface A of the host through a lead, the RS485 interface B is used for acquiring a power supply and communicating with the host, and the temperature sensor and the humidity sensor are respectively used for monitoring the temperature and the humidity; the gas sensor comprises a G1 gas sensor, a G2 gas sensor and a G3 gas sensor, and the G1 gas sensor, the G2 gas sensor and the G3 gas sensor are used for monitoring the gas concentration of corresponding types;
the switch equipment and the cable line insulation fault monitoring system have the following technical scheme that the early warning value is set to be three-stage early warning: the first level is a concerned value, which is defined as that the insulating material is slightly damaged, and the data needs to be continuously concerned, and the G1 gas sensor, the G2 gas sensor and the G3 gas sensor are respectively 20ppm, 30ppm and 30ppm; the second level is an operation and maintenance value, which is defined as that the insulating material is damaged and the damage can continuously develop, and an operation and maintenance plan is required to be made for maintenance in a short period, wherein the G1 gas sensor, the G2 gas sensor and the G3 gas sensor are respectively 40ppm, 60ppm and 60ppm; the third level is an emergency early warning value, which is defined as that the insulating material is seriously damaged and is required to be immediately subjected to on-site operation and maintenance, and the G1 gas sensor, the G2 gas sensor and the G3 gas sensor are respectively 80ppm, 120ppm and 120ppm; when the G1 gas sensor is less than 20ppm and the G2 gas sensor is less than 30ppm and the G3 gas sensor is less than 30ppm, the insulation state is good; when the G1 gas sensor is less than or equal to 20ppm and less than 40ppm or the G2 gas sensor is less than or equal to 30ppm and less than or equal to 60ppm or the G3 gas sensor is less than or equal to 30ppm and less than or equal to 60ppm, the insulating material is slightly damaged, and continuous attention is required to be paid to the data; when G1 gas sensor is more than or equal to 40ppm and less than 80ppm or G2 gas sensor is more than or equal to 60ppm and less than or equal to 120ppm or G3 gas sensor is more than or equal to 60ppm and less than or equal to 120ppm, the insulation material is damaged and the damage can continuously develop, and an operation and maintenance plan is needed to be made in a short period of time for maintenance; when the G1 gas sensor is more than or equal to 80ppm or the G2 gas sensor is more than or equal to 120ppm or the G3 gas sensor is more than or equal to 120ppm, the insulating material is seriously damaged, and the on-site operation, maintenance and overhaul are required immediately;
Determining that the insulation fault is an internal fault or an external fault by adopting the ratio of the G1 gas sensor, the G2 gas sensor and the G3 gas sensor, wherein the internal fault is defined as the insulation fault occurring on the inner surface of the insulation material, and the external fault is defined as the insulation fault occurring on the outer surface of the insulation material; when the G2 gas sensor/G1 gas sensor is more than or equal to 3 and the G2 gas sensor/G3 gas sensor is more than or equal to 3, the insulation fault is an internal fault; when the G2 gas sensor/G1 gas sensor is less than 3 or the G2 gas sensor/G3 gas sensor is less than 3, the insulation fault is an external fault;
the host and the sensor unit are connected in a wired mode through RS232 or RS485, or the host and the sensor unit are in signal transmission through 2.4G, zigbee or LoRa wireless communication mode;
the gas sensor is an electrochemical sensor, an optical sensor or a semiconductor sensor, the characteristic gas measuring range of the gas sensor is 0-1000 ppm, the resolution is 0.1ppm, the error is +/-5%, and the temperature compensation range is as follows: -40-70 ℃;
The temperature measurement range of the temperature sensor is-40-125 ℃, the resolution is 0.1 ℃, and the error is +/-0.2 ℃;
the humidity measuring range of the humidity sensor is 0-100%, the resolution is 0.1%, and the error is +/-2%.
2. The switchgear and cabling insulation fault monitoring system according to claim 1, wherein the host computer is in data transmission with the database via a 4G wireless network and a server.
3. The switchgear and cabling insulation fault monitoring system according to claim 1 or 2, wherein the data platform module comprises data platform software capable of checking data and operating status by logging in through a network account at a mobile or fixed end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310955937.3A CN116973704B (en) | 2023-08-01 | 2023-08-01 | Switch equipment and cable line insulation fault monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310955937.3A CN116973704B (en) | 2023-08-01 | 2023-08-01 | Switch equipment and cable line insulation fault monitoring system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116973704A CN116973704A (en) | 2023-10-31 |
| CN116973704B true CN116973704B (en) | 2024-07-26 |
Family
ID=88474512
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310955937.3A Active CN116973704B (en) | 2023-08-01 | 2023-08-01 | Switch equipment and cable line insulation fault monitoring system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116973704B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118671521A (en) * | 2024-05-23 | 2024-09-20 | 国网宁夏电力有限公司吴忠供电公司 | Insulation fault simulation and multi-parameter detection experimental device for separable connector of inflatable switch cabinet |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114866550A (en) * | 2022-05-16 | 2022-08-05 | 云南电网有限责任公司瑞丽供电局 | Environment parameter and insulation fault early warning on-line monitoring system applied to ring main unit |
| CN115015699A (en) * | 2022-04-21 | 2022-09-06 | 国网安徽省电力有限公司电力科学研究院 | Insulation fault early warning on-line monitoring system applied to medium-voltage switch cabinet |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11251153A (en) * | 1998-03-05 | 1999-09-17 | Mitsubishi Electric Corp | Anomaly detection device |
| CN115459448A (en) * | 2022-09-22 | 2022-12-09 | 广西电网有限责任公司电力科学研究院 | Switch cabinet latent fault diagnosis early warning detection system and method |
| CN115616362A (en) * | 2022-11-11 | 2023-01-17 | 贵州电网有限责任公司 | High-voltage switch cabinet insulation fault characteristic gas detection system and diagnosis method |
| CN115825718A (en) * | 2022-11-21 | 2023-03-21 | 北京华电云通电力技术有限公司 | Partial discharge online monitoring system and method for gas insulated switch |
-
2023
- 2023-08-01 CN CN202310955937.3A patent/CN116973704B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115015699A (en) * | 2022-04-21 | 2022-09-06 | 国网安徽省电力有限公司电力科学研究院 | Insulation fault early warning on-line monitoring system applied to medium-voltage switch cabinet |
| CN114866550A (en) * | 2022-05-16 | 2022-08-05 | 云南电网有限责任公司瑞丽供电局 | Environment parameter and insulation fault early warning on-line monitoring system applied to ring main unit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN116973704A (en) | 2023-10-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113124929A (en) | Transformer substation multi-parameter signal acquisition comprehensive analysis system and method | |
| US9823289B2 (en) | Automated digital earth fault system | |
| CN100592068C (en) | SF6 gas density and micro-water integrated on-line monitor | |
| CN201247294Y (en) | Synthesis on-line automatization monitoring system for transformer substation | |
| CN103513139A (en) | Power transformer fault intelligent diagnosis technology, method and device | |
| CN201575970U (en) | SF6 comprehensive tester | |
| CN116973704B (en) | Switch equipment and cable line insulation fault monitoring system | |
| CN116169789A (en) | High-voltage component operation quality management system for air charging cabinet | |
| CN108152653A (en) | Transformer fault monitoring device and system | |
| CN210129012U (en) | A partial discharge monitoring and early warning device for switchgear based on gas monitoring | |
| Raja et al. | Comparative investigations on UHF and acoustic PD detection sensitivity in transformers | |
| CN116449256A (en) | A transformer state fault diagnosis system and method based on voiceprint sensing | |
| CN114842624A (en) | High-voltage cable tunnel state sensing system and method | |
| CN105911436A (en) | Supersonic wave-based partial discharge wireless monitoring system | |
| CN203502513U (en) | A device state simulation device for power transmission and transformation system equipment | |
| CN106768018B (en) | Site installs the on-line monitoring and diagnostic system and method for second power equipment | |
| CN115598476A (en) | Method, device and medium for monitoring multi-parameter fusion insulation state of annular net cage | |
| CN113959956A (en) | A dual-chamber photoacoustic spectrum monitoring system for dissolved gas in transformer oil | |
| CN113267711A (en) | On-line monitoring system and monitoring method for insulation state of high-voltage electrical equipment of transformer substation | |
| CN2691123Y (en) | Real time on-line monitor for higt voltage equipment of transforming station | |
| CN107907804A (en) | A kind of GIS device ultrasonic wave partial discharge detecting system | |
| CN203838056U (en) | Sulfur hexafluoride gas leakage monitoring and sensing unit with self-calibration function | |
| CN106251557A (en) | A kind of multiparameter temperature measuring type electrical fire monitoring system | |
| CN212301743U (en) | Transformer partial discharge monitoring device for offshore oil drilling platform | |
| CN205942981U (en) | Multi -parameter temperature measurement formula alarm and control system for electric fire prevention |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |