CN203350394U - Cable fault locating and temperature load on-line monitoring system - Google Patents

Cable fault locating and temperature load on-line monitoring system Download PDF

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Publication number
CN203350394U
CN203350394U CN201320464423XU CN201320464423U CN203350394U CN 203350394 U CN203350394 U CN 203350394U CN 201320464423X U CN201320464423X U CN 201320464423XU CN 201320464423 U CN201320464423 U CN 201320464423U CN 203350394 U CN203350394 U CN 203350394U
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CN
China
Prior art keywords
temperature
current
line monitoring
cable
communication terminal
Prior art date
Application number
CN201320464423XU
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Chinese (zh)
Inventor
黄威斌
李红
王辉
王霞
曾庆龙
彭浩
李延吉
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北京浩天中胜科技有限公司
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Priority to CN201320464423XU priority Critical patent/CN203350394U/en
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    • YGENERAL 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
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS 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
    • Y04S10/00Systems supporting electrical power generation, transmission or distribution
    • Y04S10/50Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
    • Y04S10/52Outage or fault management, e.g. fault detection or location

Abstract

The application discloses a cable fault locating and temperature load on-line monitoring system. The cable fault locating and temperature load on-line monitoring system comprises multiple sets of fault detection devices, a communication terminal, a system main station, a thermodetector and a plurality of temperature detection devices, wherein the multiple sets of fault detection devices are arranged at the different positions of a cable separately, and each set of fault detection devices comprises three first current detection devices and a second current detection device, the communication terminal is connected with the first current detection devices and the second current detection device, and the plurality of temperature detection devices are fixed at the to-be-detected positions in a high voltage device; the thermodetector is connected with the plurality of temperature detection devices, and the system main station is connected with the communication terminal and the thermodetector in a remote communication manner. When a line breaks down, the lines under the same segment of bus of the same transformer respond, and the response situation of the lines and the response situation among the different phases of the same line can be judged comprehensively via the system main station, thereby improving the fault detection reliability.

Description

Cable fault location and temperature load on-line monitoring system
Technical field
The application relates to the power technology field, particularly relates to a kind of cable fault location and temperature load on-line monitoring system.
Background technology
Electric system is just towards the direction fast development of large electrical network high reliability, high automation level.Operation of power networks robotization, intelligentized monitoring level have been become to the key issue of domestic and international great attention.Along with the increase day by day of social power consumption, the high voltage electric equipment that is carrying large load conveying task is also increasing sharply as electrical loads such as transformer, mutual inductor, high-tension switch cabinet, outdoor disconnecting links.Interface in electrical network between numerous high voltage electric equipments itself, equipment is that electric power is carried weakest link, and the substantive issue of this weak link is exactly the interface heating.Increase along with load causes interface generate heat and forms vicious cycle: temperature rise, expansion, contraction, oxidation, resistance increase, heating direct is to leading to a disaster once again.
In addition, due to trans-regional many, the scope of power network line extensively, environment is various on the way, once at first the power failure of breaking down makes troubles to the lives of the people, has upset the normal production of enterprise; Next is to have caused heavy losses to power supply enterprise.Take China 10kV city and rural area distribution network cable system is example, and in operational process, failure ratio is more, and especially earth fault, due to its recessive characteristic, be difficult to search sometimes.
Power supply enterprise adopts manual inspection usually for the malfunction monitoring mode of cable line at present, even sometimes, have to determine the guilty culprit line segment by pulling section switch and through electric substation's trial line charging, the localization of fault workload is very large, and location postpones longer, can't accomplish timely and effectively fault to be positioned, greatly affect the reliability of power supply.
Therefore need a kind of system that can carry out early warning and can position fault fault badly after fault occurs.
The utility model content
In view of this, the embodiment of the present application provides a kind of cable fault location and temperature load on-line monitoring system, the carrying out of cable line fault point is located and load condition is detected automatically realizing, ensures that circuit moves.
To achieve these goals, the technical scheme that the embodiment of the present application provides is as follows:
A kind of cable fault location and temperature load on-line monitoring system comprise: many set of fault pick-up unit, communication terminal, system main website, temperature measurer and a plurality of temperature-detecting device, wherein,
The described failure detector of many covers is arranged on respectively on the diverse location of cable, the described failure detector of every cover comprises: be separately fixed on each the single-phase electric wire in threephase cable, detect three the first current sensing meanss of short-circuit current on each described single-phase electric wire and current temperature; With, be fixed on the threephase cable bus, detect the ground current of described threephase cable bus and the second current sensing means of load current and current temperature;
Described communication terminal is connected with described the first current sensing means, the second current sensing means, gathers described short-circuit current, ground current, load current and current temperature;
A plurality of described temperature-detecting devices are fixed on position to be detected in high-tension apparatus, detect the device temperature of position to be detected in described high-tension apparatus;
Described temperature measurer is connected with a plurality of described temperature-detecting devices, gathers described temperature-detecting device and detects the device temperature obtained;
Described system main website is connected by the telecommunication mode with described communication terminal, temperature measurer.
Preferably, the described failure detector of every cover also comprises:
Built-in power for power supply;
With described the first current sensing means, with the second current sensing means, be connected respectively, for the pilot lamp of being pointed out when earth fault or short trouble being detected.
Preferably, described communication terminal comprises: multi-channel data acquisition module and communication module;
Described multi-channel data acquisition module is connected with described the first current sensing means, the second current sensing means by optical fiber;
Described communication module is connected with described multi-channel data acquisition module, and the data that collect are sent.
Preferably, described temperature measurer is connected with a plurality of described temperature-detecting devices by the mode of wireless connections.
Preferably, on described temperature measurer, be provided with:
2.4G wireless transceiver circuit for the receiving equipment temperature;
Display for the display device temperature;
Described temperature-detecting device comprises:
Temperature sensor;
The metering circuit be connected with described temperature sensor;
The logic control circuit be connected with described metering circuit;
The power supply be connected with described logic control circuit and 2.4G wireless transceiver circuit.Preferably, described communication terminal also comprises:
Be set on cable, and be connected with described multi-channel data acquisition module, communication module, the electricity-getting mutual inductor that is used to described multi-channel data acquisition module and communication module to be powered.
Preferably, described communication terminal also comprises:
Be connected with described electricity-getting mutual inductor, and be connected with described multi-channel data acquisition module, communication module, for when described electricity-getting mutual inductor quits work, the super capacitor of being powered to described multi-channel data acquisition module and communication module.
Preferably, described system main website is provided with reception signal terminal;
Described reception signal terminal and described communication terminal, temperature measurer carry out telecommunication by GPRS.
Preferably, the position to be detected in described high-tension apparatus comprises: high-tension switch cabinet contact and contact, indoor outer transformer, box-type substation, high voltage bus joint, high-voltage cable joint and/or chopper switch.
From above technical scheme, this cable fault location and temperature load on-line monitoring system that the embodiment of the present application provides, by many set of fault of subsection setup pick-up unit on cable line to be detected, and the short-circuit current of detection streamer circuit, ground current, load current and current temperature, and the data that detect are sent to the system main website by communication terminal, in addition, can gather the device temperature of position to be detected in high-tension apparatus by the set temperature pick-up unit, and utilize temperature measurer temperature data can be sent to the system main website, and then when line failure, circuit under same section bus of same transformer all can respond, by the response situation between each circuit and the different phases of same circuit, can comprehensively judge in the system main website, improve the reliability of fault detect.
The accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present application or technical scheme of the prior art, below will the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described, apparently, the accompanying drawing the following describes is only some embodiment that put down in writing in the application, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
A kind of cable fault that Fig. 1 provides for the embodiment of the present application is located the structural representation with the temperature load on-line monitoring system;
The structural representation of the temperature-detecting device that Fig. 2 provides for the embodiment of the present application.
Embodiment
In order to make those skilled in the art person understand better the technical scheme in the application, below in conjunction with the accompanying drawing in the embodiment of the present application, technical scheme in the embodiment of the present application is clearly and completely described, obviously, described embodiment is only the application's part embodiment, rather than whole embodiment.Embodiment based in the application, those of ordinary skills are not making under the creative work prerequisite the every other embodiment obtained, and all should belong to the scope of the application's protection.
A kind of cable fault that Fig. 1 provides for the embodiment of the present application is located the structural representation with the temperature load on-line monitoring system.
As shown in Figure 1,101 buses that are threephase cable in figure, 102 is the single line electric wire, this on-line monitoring system comprises: many set of fault pick-up unit, communication terminal 7, system main website 10, temperature measurer 9 and a plurality of temperature-detecting device 8.
Many set of fault pick-up unit is arranged on respectively on the diverse location of cable, and for by cable staging treating to be detected, and the failure condition that utilizes many set of fault pick-up unit to come segmentation to treat detection streamer is detected.
As shown in Figure 1, every set of fault pick-up unit includes: 3 the first current sensing meanss 1 and 1 the second current sensing means 2, wherein,
3 the first current sensing meanss 1 are separately fixed on each the single-phase electric wire in threephase cable, for detection of short-circuit current and current temperature on each described single-phase electric wire;
The second current sensing means 2 is fixed on the threephase cable bus, for detection of ground current and load current and the current temperature of described threephase cable bus.Here current temperature can reflect the temperature of cable itself, and then situation that can be overheated to cable is monitored.
In the embodiment of the present application, failure detector, without setting setting valve, can adapt to load current and transformer station's outlet protection definite value automatically, avoids that load fluctuation is large, malfunction in the inrush phenomenon situation.
In addition, the first current sensing means 2 can have the short-circuit current detecting device of temperature detecting function, its short-circuit detecting principle:
1. first there is short-circuit current sudden change increment to be greater than 120A;
2. switch trip subsequently, electric current drops to below 2A, and lower voltage is below AC1kV simultaneously;
This short-circuit current detecting device has the following advantages:
1, inverse time characteristic:
The automatic follow load size of current of operation curve.Canonical parameter: when load current 100A, the corresponding response time 0.4s of mutation current 120A, the corresponding response time 0.08S of mutation current 300A, the corresponding response time 0.03s of mutation current 600A, the longest permission tripping operation is 2.5s;
But 2, auto-returned after the action;
3, the function that there is the power failure locking.While guaranteeing reclosing, the failure detector of non-fault branch can misoperation.There are electric current, voltage locking afterwards in 15 seconds could remove and respond the short-circuit current signal, the indication short trouble;
The second current sensing means 2 can have the checking for grounded current device of temperature detecting function, and its ground connection is detected principle:
1. adopt the zero-sequence current detection method;
2. set the startup value before dispatching from the factory, be enclosed within on the line cable, once earth fault occurs, the zero-sequence current value shows after surpassing the startup definite value of setting on the spot.
At every set of fault pick-up unit, all can also comprise: built-in power and pilot lamp, wherein,
Built-in power can be the lithium battery source, and failure detector does not need to provide external power source like this, can make complete machine be not less than 8 years serviceable life;
Pilot lamp is connected with the second current sensing means 2 with described the first current sensing means 1 respectively, for being pointed out when earth fault or short trouble being detected.
In addition, in the embodiment of the present application, for convenient, the prompting of pilot lamp is comprehensively grasped, as shown in Figure 1, can indication panel 3 be set, be provided with a plurality of pilot lamp on indication panel 3, and a plurality of pilot lamp is connected with the second current sensing means 2 with the first current sensing means 1 in many set of fault pick-up unit by optical fiber 4 respectively.
Communication terminal 7 is connected with described the first current sensing means 1, the second current sensing means 2 respectively, gathers described short-circuit current, ground current, load current and current temperature.
As shown in Figure 1, communication terminal 7 comprises: multi-channel data acquisition module 5 and communication module 6;
Described multi-channel data acquisition module 5 is connected with described the first current sensing means 1, the second current sensing means 2 by optical fiber 4; Described communication module 6 is connected with described multi-channel data acquisition module 5, and the data that collect are sent.In addition, between communication module 6 and multi-channel data acquisition module 5, can adopt RS485 intercommunication mode to communicate.
In order to guarantee the power supply of communication terminal, in the embodiment of the present application, communication terminal can comprise: electricity-getting mutual inductor, electricity-getting mutual inductor is set on cable, and be connected with described multi-channel data acquisition module, communication module, be used to described multi-channel data acquisition module and communication module to be powered.
Electricity-getting mutual inductor also takes electric CT, can adopt the twin coil parallel-connection structure, and electricity-getting mutual inductor comprises: electricity taking coil, control circuit and power module form.Wherein electricity taking coil is set on cable the electric energy of being responsible for extracting a circuit; The electric current that control circuit is secondary by electricity taking coil, be transformed to stable Voltage-output (24V), to power module, powers.
When electricity-getting mutual inductor normally during power taking, now in order to guarantee that communication terminal can work, this communication terminal can also comprise: super capacitor, super capacitor is connected with described electricity-getting mutual inductor, and be connected with described multi-channel data acquisition module, communication module, for when described electricity-getting mutual inductor quits work, to described multi-channel data acquisition module and communication module, powered.
In the embodiment of the present application, super capacitor is connected with power module, and power module is responsible for power supply input, output and super capacitor management of charging and discharging; Super capacitor is responsible for storage power, for primary current, is less than 15A or is greater than the 600A(electricity taking coil degree of depth saturated) can't power taking the time, under the condition of dead electricity fully, super capacitor can maintain 3W(remote transmission device power) loaded work piece 30 minutes.
A plurality of described temperature-detecting devices 8 are fixed on position to be detected in high-tension apparatus, detect the device temperature of position to be detected in described high-tension apparatus.As shown in Figure 2, temperature-detecting device 8 can comprise:
Temperature sensor 81, metering circuit 82, logic control circuit 84,2.4G wireless transceiver circuit 83 and power supply 85, wherein:
Metering circuit 82 is connected with described temperature sensor 81, and logic control circuit 84 is connected with described metering circuit 82, and logic control circuit 84 is connected with 2.4G wireless transceiver circuit 83, power supply 85 respectively.
In the embodiment of the present application, the position to be detected in described high-tension apparatus comprises: high-tension switch cabinet contact and contact, indoor outer transformer, box-type substation, high voltage bus joint, high-voltage cable joint and/or chopper switch.
Temperature measurer 9 is connected with a plurality of described temperature-detecting devices 8, gathers described temperature-detecting device and detects the device temperature obtained.In the embodiment of the present application, on temperature measurer 9, display can be set, for showing the temperature value collected, in addition, temperature measurer 9 can also be provided with the 2.4G wireless transceiver circuit for the receiving equipment temperature, like this, temperature measurer 9 just can be connected with a plurality of temperature-detecting devices 8 by the mode of wireless connections, and adopts the wireless radio frequency transmission signal, makes between temperature-detecting device and temperature measurer without being connected on electric, there is the high pressure isolation performance, improved the precision of temperature detection.
As shown in Figure 1, be provided with reception signal terminal 11 in system main website 10, reception signal terminal 11 carries out telecommunication with described communication terminal, temperature measurer by GPRS.System main website 10 is interior can operational monitoring software, detect software and comprise:
Receiving short message collection basis, data operation analyzing and processing and line status show and report to the police.Reception signal terminal receives fault, load current and temperature information and by serial ports, data is sent on computing machine, and computing machine carries out the data that receive
Analyzing and processing.Show the fault name of station on chart, line name, time of fire alarming and current temperature parameter, failure message flash for prompting warning on wiring diagram simultaneously, and use the SMS notification operator on duty.System is supported distributed data base, can search historical record.
So just make the system main website there is the function of comprehensive judgement, when breaking down, circuit under same section bus of same transformer all can respond, by the response situation between each circuit and the different phases of same circuit, and then can do comprehensive judgement in the system main website, this also can improve the reliability of fault detect.Powerful, there is multinomial management function, and can constantly upgrade.
In addition, the system main website can also be stored the historical data of fault, and can consult historical record data whenever and wherever possible, and has editting function, can add or delete monitoring point and corresponding icon thereof, change managerial personnel and phone number thereof etc.; Can also carry out the historical record inquiry, daily record editor etc.
From above technical scheme, this cable fault location and temperature load on-line monitoring system that the embodiment of the present application provides, by many set of fault of subsection setup pick-up unit on cable line to be detected, and the short-circuit current of detection streamer circuit, ground current, load current and current temperature, and the data that detect are sent to the system main website by communication terminal, in addition, can gather the device temperature of position to be detected in high-tension apparatus by the set temperature pick-up unit, and utilize temperature measurer temperature data can be sent to the system main website, and then when line failure, circuit under same section bus of same transformer all can respond, by the response situation between each circuit and the different phases of same circuit, can comprehensively judge in the system main website, improve the reliability of fault detect.
The above is only the application's preferred implementation, makes those skilled in the art can understand or realize the application.Multiple modification to these embodiment will be apparent to one skilled in the art, and General Principle as defined herein can be in the situation that do not break away from the application's spirit or scope, realization in other embodiments.Therefore, the application will can not be restricted to these embodiment shown in this article, but the widest scope consistent with principle disclosed herein and features of novelty of will loading.

Claims (9)

1. a cable fault is located and the temperature load on-line monitoring system, it is characterized in that, comprising: many set of fault pick-up unit, communication terminal, system main website, temperature measurer and a plurality of temperature-detecting device, wherein,
The described failure detector of many covers is arranged on respectively on the diverse location of cable to be detected, the described failure detector of every cover comprises: be separately fixed on each the single-phase electric wire in threephase cable, detect three the first current sensing meanss of short-circuit current on each described single-phase electric wire and current temperature; With, be fixed on the threephase cable bus, detect the ground current of described threephase cable bus and the second current sensing means of load current and current temperature;
Described communication terminal is connected with described the first current sensing means, the second current sensing means, gathers described short-circuit current, ground current, load current and current temperature;
A plurality of described temperature-detecting devices are fixed on position to be detected in high-tension apparatus, detect the device temperature of position to be detected in described high-tension apparatus;
Described temperature measurer is connected with a plurality of described temperature-detecting devices, gathers described temperature-detecting device and detects the device temperature obtained;
Described system main website is connected by the telecommunication mode with described communication terminal, temperature measurer.
2. on-line monitoring system according to claim 1, is characterized in that, the described failure detector of every cover also comprises:
Built-in power for power supply;
With described the first current sensing means, with the second current sensing means, be connected respectively, for the pilot lamp of being pointed out when earth fault or short trouble being detected.
3. on-line monitoring system according to claim 2, is characterized in that, described communication terminal comprises: multi-channel data acquisition module and communication module;
Described multi-channel data acquisition module is connected with described the first current sensing means, the second current sensing means by optical fiber;
Described communication module is connected with described multi-channel data acquisition module, and the data that collect are sent.
4. on-line monitoring system according to claim 3, is characterized in that, described temperature measurer is connected with a plurality of described temperature-detecting devices by the mode of wireless connections.
5. on-line monitoring system according to claim 4, is characterized in that, on described temperature measurer, is provided with:
2.4G wireless transceiver circuit for the receiving equipment temperature;
Display for the display device temperature;
Described temperature-detecting device comprises:
Temperature sensor;
The metering circuit be connected with described temperature sensor;
The logic control circuit be connected with described metering circuit;
The power supply be connected with described logic control circuit and 2.4G wireless transceiver circuit.
6. on-line monitoring system according to claim 5, is characterized in that, described communication terminal also comprises:
Be set on cable, and be connected with described multi-channel data acquisition module, communication module, the electricity-getting mutual inductor that is used to described multi-channel data acquisition module and communication module to be powered.
7. on-line monitoring system according to claim 6, is characterized in that, described communication terminal also comprises:
Be connected with described electricity-getting mutual inductor, and be connected with described multi-channel data acquisition module, communication module, for when described electricity-getting mutual inductor quits work, the super capacitor of being powered to described multi-channel data acquisition module and communication module.
8. on-line monitoring system according to claim 7, is characterized in that, described system main website is provided with reception signal terminal;
Described reception signal terminal and described communication terminal, temperature measurer carry out telecommunication by GPRS.
9. on-line monitoring system according to claim 8, it is characterized in that, the position to be detected in described high-tension apparatus comprises: high-tension switch cabinet contact and contact, indoor outer transformer, box-type substation, high voltage bus joint, high-voltage cable joint and/or chopper switch.
CN201320464423XU 2013-07-31 2013-07-31 Cable fault locating and temperature load on-line monitoring system CN203350394U (en)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103983901A (en) * 2014-05-30 2014-08-13 智友光电技术发展有限公司 Online failure positioning method for ring main unit cable line
CN104062483A (en) * 2014-07-01 2014-09-24 杭州意能防雷技术有限公司 Distributed high voltage cable shielding layer current monitoring system and distributed high voltage cable shielding layer current monitoring method thereof
CN104078872A (en) * 2014-07-09 2014-10-01 郑州金源特变电气有限公司 Mobile armored metal-enclosed switch cabinet
CN104316839A (en) * 2014-11-07 2015-01-28 国网辽宁省电力有限公司鞍山供电公司 Power equipment and transmission line malfunction comprehensive online monitoring system
CN104330686A (en) * 2014-11-20 2015-02-04 国家电网公司 System for detecting power supply circuit fault
CN104504886A (en) * 2015-01-06 2015-04-08 上海自动化仪表股份有限公司 Method for realizing multichannel temperature value wireless transmission
CN105842565A (en) * 2016-05-16 2016-08-10 上海欧忆智能网络有限公司 Electrical apparatus heat fault on-line monitoring system and device
CN107850629A (en) * 2015-05-13 2018-03-27 电网监控有限公司 It is tethered at the method and system of router
CN108133586A (en) * 2017-12-01 2018-06-08 国网北京市电力公司 Load acquisition method, device, equipment, storage medium and processor
CN109029748A (en) * 2017-06-10 2018-12-18 北京万览时代网络科技有限公司 High-tension cable temperature detecting alarm system

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103983901A (en) * 2014-05-30 2014-08-13 智友光电技术发展有限公司 Online failure positioning method for ring main unit cable line
CN104062483A (en) * 2014-07-01 2014-09-24 杭州意能防雷技术有限公司 Distributed high voltage cable shielding layer current monitoring system and distributed high voltage cable shielding layer current monitoring method thereof
CN104078872A (en) * 2014-07-09 2014-10-01 郑州金源特变电气有限公司 Mobile armored metal-enclosed switch cabinet
CN104316839A (en) * 2014-11-07 2015-01-28 国网辽宁省电力有限公司鞍山供电公司 Power equipment and transmission line malfunction comprehensive online monitoring system
CN104330686A (en) * 2014-11-20 2015-02-04 国家电网公司 System for detecting power supply circuit fault
CN104504886A (en) * 2015-01-06 2015-04-08 上海自动化仪表股份有限公司 Method for realizing multichannel temperature value wireless transmission
CN107850629A (en) * 2015-05-13 2018-03-27 电网监控有限公司 It is tethered at the method and system of router
CN105842565A (en) * 2016-05-16 2016-08-10 上海欧忆智能网络有限公司 Electrical apparatus heat fault on-line monitoring system and device
CN109029748A (en) * 2017-06-10 2018-12-18 北京万览时代网络科技有限公司 High-tension cable temperature detecting alarm system
CN108133586A (en) * 2017-12-01 2018-06-08 国网北京市电力公司 Load acquisition method, device, equipment, storage medium and processor

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