CN103529417B - A kind of distribution line failure indicator automatic checkout system - Google Patents

A kind of distribution line failure indicator automatic checkout system Download PDF

Info

Publication number
CN103529417B
CN103529417B CN201310478541.0A CN201310478541A CN103529417B CN 103529417 B CN103529417 B CN 103529417B CN 201310478541 A CN201310478541 A CN 201310478541A CN 103529417 B CN103529417 B CN 103529417B
Authority
CN
China
Prior art keywords
signal
output
module
controlling
current
Prior art date
Application number
CN201310478541.0A
Other languages
Chinese (zh)
Other versions
CN103529417A (en
Inventor
李柏奎
梁英
邓宏芬
Original Assignee
国家电网公司
中国电力科学研究院
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 国家电网公司, 中国电力科学研究院 filed Critical 国家电网公司
Priority to CN201310478541.0A priority Critical patent/CN103529417B/en
Publication of CN103529417A publication Critical patent/CN103529417A/en
Application granted granted Critical
Publication of CN103529417B publication Critical patent/CN103529417B/en

Links

Abstract

The invention provides a kind of distribution line failure indicator automatic checkout system, comprise automatic test module, output-controlling device, data acquisition unit and control harvester; Described output-controlling device, data acquisition unit and control harvester are connected described automatic test module by computer communication line respectively. The invention provides a kind of distribution line failure indicator automatic checkout system, realize the Real-time Collection to fault detector operating state, ac voltage signal and the ac current signal amplitude of test can reach 10kV, 2kA, can more accurate analog line actual signal, and automaticity is high, testing efficiency is high, security is good.

Description

A kind of distribution line failure indicator automatic checkout system

Technical field

The present invention relates to a kind of detection system, be specifically related to a kind of distribution line failure indicator automatic checkout system.

Background technology

Although play a large amount of use line-failure indicators in distribution line, and its manufacturing enterprise's number is numerous, does not also have both at home and abroadUnified indicator standards and guidelines, causes fault alarm that the fault detector using in distribution network systems adopts according to notTo the greatest extent identical, the difference of technology level of product is very large, and in the time of line failure, indicator motion accuracy is low, easily fail to report,The phenomenons such as wrong report.

2010, State Grid Corporation of China promulgated company standard " Q/GDW436-2010 distribution line failure indicator techniques ruleModel ", function, performance indications and method of testing to fault detector carried out unified regulation, specified several functions, performanceTest event. Although generally adopting program control or PLC to control, advanced fault detector detection technique there is alternating voltage, electric current,Produce overhead transmission line voltage, current signal by step-up transformer, up-flow coil again, to hanging over the indicating fault on up-flow coilDevice detects. But said detecting system is open cycle system, need manual record testing result and judge, it is wasted time and energy,And signal output accuracy is lower, time control accuracy is lower, and poor practicability is difficult to realize the detection of automation, can not meetFault detector function, performance, efficiency that " Q/GDW436-2010 distribution line failure indicator techniques specification " proposes are surveyedThe demand of examination.

The inventor finds by large quantity research, and fault detector detection system requires further improvement practicality, realizes automation,Need to solve following technical problem:

(1) can automatically gather and failure judgement indicator motion state, form closed loop detection system;

(2) improve alternating voltage, electric current output amplitude and precision;

(3) improve signal output time control accuracy;

(4) auto Detection Software that design test project is complete, man-machine interface is friendly.

Summary of the invention

In order to overcome above-mentioned the deficiencies in the prior art, the invention provides a kind of distribution line failure indicator automatic checkout system, realShowed the Real-time Collection to fault detector operating state, the ac voltage signal of test and ac current signal amplitude can reach10kV, 2kA, can more accurate analog line actual signal, and automaticity is high, testing efficiency is high, security is good.

In order to realize foregoing invention object, the present invention takes following technical scheme:

The invention provides a kind of distribution line failure indicator automatic checkout system, described system comprises automatic test module, outputControl device, data acquisition unit and control harvester; Described output-controlling device, data acquisition unit and control collection dressPut respectively and be connected with described automatic test module by computer communication line.

Described Auto-Test System is given described output-controlling device output AC voltage signal and ac current signal, described output controlDevice processed is given respectively up-flow coil and step-up transformer output AC current signal and ac voltage signal, ac current signal and friendshipStream voltage signal forms the ac voltage signal of voltage levels of the actual overhead transmission line of simulation and high current class through amplifying respectivelyAc current signal; Described fault detector is arranged on described up-flow coil, and its switching value node output is connected to described controlThe switching value input of harvester processed, its wireless communication signals receives by the reception of wireless signals module of controlling in harvesterAnd parsing; Gather by the PFGA controlling in harvester fault detector action and the involution status information that parsing obtains,FPGA sends to output-controlling device by optical fiber communication modules by contact status signal and wireless telecommunications information; Described data acquisitionThe voltage measurement end of acquisition means is parallel to the voltage output end of described output-controlling device, and its current measurement end adopts current transformer,Described current transformer is socketed on the electric current output line of output-controlling device.

Described output-controlling device comprises that DSP module, DAC module, alternating voltage power amplifier, alternating current power putsLarge device and optical fiber communication modules; Described DSP module receives parameter and the order of host computer output, by real-time calculating, controlsDAC module is exported simulated ac voltage signal and ac current signal; Described alternating voltage power amplifier and alternating currentPower amplifier receives respectively ac voltage signal and the ac current signal of DAC module output, and by the alternating voltage letter receivingNumber and ac current signal through amplification after be transferred to respectively step-up transformer and up-flow coil; Described optical fiber communication modules receivesFrom the fiber-optic signal of data acquisition unit, therefrom parse action message and the involution status information of fault detector, indicating faultThe action message of device and involution status information upload to host computer by described DSP module.

Described DSP module is carried out the real-time calculating of 3 cross streams voltages and 3 cross streams electric currents simultaneously, and is calculating in real time stackDC component, harmonic component or high-frequency pulse string component, to produce the failure voltage signal under short trouble and earth-fault conditionsWith fault current signal;

The way of output of described DSP module is divided into manual output and status switch output;

Manually, under the pattern of output, can change at any time amplitude, phase place and the frequency of output signal, and the amplitude of superposed signal,Phase place and frequency;

Under the pattern of status switch output, user sets in advance parameter before output, while comprising output signal parameter and State-outputBetween, status switch has been exported rear described output-controlling device and has been stopped output.

Described data acquisition unit comprises measurement module, data acquisition module, microprocessor module and record wave memory module; InstituteState measurement module the AC signal of collection is transferred to described data acquisition module; Described data acquisition module is by the interchange letter gatheringNumber input to record wave memory module, after AC signal being changed and calculated simultaneously, result of calculation is inputed to microprocessorModule, and the original interchange data that gather are inputed to record wave memory module; Described microprocessor module is by result of calculation and adoptingThe original AC signal of collection inputs to host computer.

Described measurement module comprises ac voltage measurement module and ac current measurement module, respectively to ac voltage signal with exchangeCurrent signal is measured.

Described record wave memory module comprises large capacity nonvolatile memory, for storing in short-term ac voltage signal, alternating currentStream signal, fault detector status information and temporal information.

Described control harvester comprises intake state detection module, reception of wireless signals module, FPGA and optical-fibre communications mouldPiece; Described intake state detection module detects intake signal, the corresponding contact status signal obtaining; Described wireless signal connectsReceive module and receive fault detector wireless signal, and the wireless signal receiving is resolved, obtain fault detector action and multipleReturn status information; Described FPGA gathers contact status signal and wireless telecommunications information, by optical fiber communication modules by contact stateSignal and wireless telecommunications information send to output-controlling device, and receive the acquisition configuration order that output-controlling device is sent.

Described intake signal comprises idle contact intake signal and level contact intake signal; Described contact status signal comprisesIdle contact status signal and level contact status signal.

Described automatic test module control AC signal output, collects test letter by data acquisition unit and control harvesterNumber, and the status information returned of fault detector, form and comprise output, feedback and the automatic checkout system of monitoring.

Compared with prior art, beneficial effect of the present invention is:

1. realized the Real-time Collection to fault detector operating state;

2. test voltage, current signal amplitude can reach 10kV, 2kA, can more accurate analog line actual signal;

3. control accuracy is high the output signal time, and error is less than 100 microseconds, can realize that output state accurately switches, phase angleControl, time are controlled;

4. test signal amplitude changes fast response time, DC component, harmonic component and high fdrequency component can superpose arbitrarily;

5. automatic checkout system automaticity is high, testing efficiency is high, security is good.

Automatic checkout system can all kinds of short troubles of comprehensive simulated circuit, earth fault and false alarm prevention state, test eventWhole fault detector functions, property that " Q/GDW436-2010 distribution line failure indicator techniques specification " proposes are containedCan index test project, and realized the automatic test of project, can greatly reduce testing time and tester's workIntensity, increases work efficiency and test and management level.

Brief description of the drawings

Fig. 1 is distribution line failure indicator automatic checkout system structured flowchart;

Fig. 2 is output-controlling device structured flowchart;

Fig. 3 is data acquisition unit structured flowchart;

Fig. 4 controls harvester structured flowchart;

Fig. 5 is automatic test module functional schematic;

Fig. 6 is distribution line failure indicator automatic checkout system workflow diagram.

Detailed description of the invention

Below in conjunction with accompanying drawing, the present invention is described in further detail.

As Fig. 1, the invention provides a kind of distribution line failure indicator automatic checkout system, the invention provides a kind of distribution lineFault detector automatic checkout system, described system comprises automatic test module, output-controlling device, data acquisition unit and controlHarvester processed; Described output-controlling device, data acquisition unit and control harvester are respectively by computer communication line and instituteStating automatic test module connects.

Described Auto-Test System is given described output-controlling device output AC voltage signal and ac current signal, described output controlDevice processed is given respectively up-flow coil and step-up transformer output AC current signal and ac voltage signal, ac current signal and friendshipStream voltage signal forms the ac voltage signal of voltage levels of the actual overhead transmission line of simulation and high current class through amplifying respectivelyAc current signal; Described fault detector is arranged on described up-flow coil, and its switching value node output is connected to described controlThe switching value input of harvester processed, its wireless communication signals receives by the reception of wireless signals module of controlling in harvesterAnd parsing; Gather by the PFGA controlling in harvester fault detector action and the involution status information that parsing obtains,FPGA sends to output-controlling device by optical fiber communication modules by contact status signal and wireless telecommunications information; Described data acquisitionThe voltage measurement end of acquisition means is parallel to the voltage output end of described output-controlling device, and its current measurement end adopts current transformer,Described current transformer is socketed on the electric current output line of output-controlling device.

As Fig. 2, described output-controlling device comprises DSP module, DAC module, alternating voltage power amplifier, alternating currentPower amplifier and optical fiber communication modules; Described DSP module receives parameter and the order of host computer output, by real-time calculating,Control DAC module and export simulated ac voltage signal and ac current signal; Described alternating voltage power amplifier with exchangeCurrent power amplifier receives respectively ac voltage signal and the ac current signal of DAC module output, and by the alternating current receivingPress signal and ac current signal to be transferred to respectively step-up transformer and up-flow coil after amplifying; Described optical fiber communication modules connectsReceive the fiber-optic signal from data acquisition unit, therefrom parse action message and the involution status information of fault detector, faultThe action message of indicator and involution status information upload to host computer by described DSP module.

Described DSP module is carried out the real-time calculating of 3 cross streams voltages and 3 cross streams electric currents simultaneously, and is calculating in real time stackDC component, harmonic component or high-frequency pulse string component, to produce the failure voltage signal under short trouble and earth-fault conditionsWith fault current signal;

The way of output of described DSP module is divided into manual output and status switch output;

Manually, under the pattern of output, can change at any time amplitude, phase place and the frequency of output signal, and the amplitude of superposed signal,Phase place and frequency;

Under the pattern of status switch output, user sets in advance parameter before output, while comprising output signal parameter and State-outputBetween, status switch has been exported rear described output-controlling device and has been stopped output.

As Fig. 3, described data acquisition unit comprises measurement module, data acquisition module, microprocessor module and record wave memoryModule; The AC signal of collection is transferred to described data acquisition module by described measurement module; Described data acquisition module will gatherAC signal input to record wave memory module, after AC signal being changed and calculated simultaneously, result of calculation is inputed toMicroprocessor module, and the original interchange data that gather are inputed to record wave memory module; Described microprocessor module will calculateThe original AC signal of result and collection inputs to host computer.

Described measurement module comprises ac voltage measurement module and ac current measurement module, respectively to ac voltage signal with exchangeCurrent signal is measured.

Described record wave memory module comprises large capacity nonvolatile memory, for storing in short-term ac voltage signal, alternating currentStream signal, fault detector status information and temporal information.

As Fig. 4, described control harvester comprises intake state detection module, reception of wireless signals module, FPGA and optical fiberCommunication module; Described intake state detection module detects intake signal, the corresponding contact status signal obtaining; Described wirelessSignal receiving module receives fault detector wireless signal, and the wireless signal receiving is resolved, and obtains fault detector movingDo and involution status information; Described FPGA gathers contact status signal and wireless telecommunications information, will connect by optical fiber communication modulesDotted state signal and wireless telecommunications information send to output-controlling device, and receive the acquisition configuration order that output-controlling device is sent.

Described intake signal comprises idle contact intake signal and level contact intake signal; Described contact status signal comprisesIdle contact status signal and level contact status signal.

As Fig. 5, described automatic test module control AC signal output, by data acquisition unit and the collection of control harvesterTo test signal, and the status information returned of fault detector, form and comprise output, feedback and the automatic checkout system of monitoring.

Fig. 6 is distribution line failure indicator automatic checkout system workflow diagram.

Automatic checkout system provided by the invention has solved some technical problems that automation detects:

1. adopt and directly gather fault detector output switch amount contact, or the mode of wireless communication signals, realize fault has been referred toShow the collection of device operating state. Above collection signal real-time Transmission is to control device, and time error is less than 100 microseconds;

2. adopt high-precision alternating voltage and current power amplifier. The maximum output of alternating current amplifier 60A, output accuracy0.5%, peak power output 1100VA. Up-flow coil input end is received in alternating current output, up-flow line when output 60A electric currentCircle can produce the magnetic flux that is not less than 2000 ampere-turns. The maximum output of alternating voltage amplifier 250V, output accuracy 0.5%,Large power output 75VA. The PT secondary side that boosts is received in alternating voltage output, and the PT primary side that boosts produces maximum 10kV voltage;

3. adopt high-speed dsp to control and exchange output with FPGA, output signal time departure is less than 100 microseconds. Coordinate goodThe power amplifier of good frequency response, control device can be realized output state switching accurately, phase angle control, time control,And can realize alternating current superpose arbitrarily DC component, harmonic component, high fdrequency component etc.;

4. the test event of automatic testing software has contained " Q/GDW436-2010 distribution line failure indicator techniques specification " and has carriedThe whole fault detector functions, the testing performance index project that go out, and realized the automatic test of project, can greatly subtractFew testing time and tester's working strength, increases work efficiency and test and management level.

Finally should be noted that: above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit, although referenceAbove-described embodiment has been described in detail the present invention, and those of ordinary skill in the field are to be understood that: still can be to thisInvention detailed description of the invention modify or be equal to replacement, and do not depart from spirit and scope of the invention any amendment or etc.With replacing, it all should be encompassed in the middle of claim scope of the present invention.

Claims (1)

1. a distribution line failure indicator automatic checkout system, is characterized in that: described system comprise automatic test module,Output-controlling device, data acquisition unit and control harvester; Described output-controlling device, data acquisition unit and control are adoptedAcquisition means is connected with described automatic test module by computer communication line respectively;
Described automatic test module is given described output-controlling device output AC voltage signal and ac current signal, described output controlDevice processed is given respectively up-flow coil and step-up transformer output AC current signal and ac voltage signal, ac current signal and friendshipStream voltage signal forms the ac voltage signal of voltage levels of the actual overhead transmission line of simulation and high current class through amplifying respectivelyAc current signal; Described fault detector is arranged on described up-flow coil, and its switching value node output is connected to described controlThe switching value input of harvester processed, its wireless communication signals receives by the reception of wireless signals module of controlling in harvesterAnd parsing; Gather by the FPGA controlling in harvester fault detector action and the involution status information that parsing obtains,FPGA sends to output-controlling device by optical fiber communication modules by contact status signal and wireless telecommunications information; Described data acquisitionThe voltage measurement end of acquisition means is parallel to the voltage output end of described output-controlling device, and its current measurement end adopts current transformer,Described current transformer is socketed on the electric current output line of output-controlling device;
Described output-controlling device comprises that DSP module, DAC module, alternating voltage power amplifier, alternating current power putsLarge device and optical fiber communication modules; Described DSP module receives parameter and the order of host computer output, by real-time calculating, controlsDAC module is exported simulated ac voltage signal and ac current signal; Described alternating voltage power amplifier and alternating currentPower amplifier receives respectively ac voltage signal and the ac current signal of DAC module output, and by the alternating voltage letter receivingNumber and ac current signal through amplification after be transferred to respectively step-up transformer and up-flow coil; Described optical fiber communication modules receivesFrom the fiber-optic signal of data acquisition unit, therefrom parse action message and the involution status information of fault detector, indicating faultThe action message of device and involution status information upload to host computer by described DSP module;
Described DSP module is carried out the real-time calculating of 3 cross streams voltages and 3 cross streams electric currents simultaneously, and is calculating in real time stackDC component, harmonic component or high-frequency pulse string component, to produce the failure voltage signal under short trouble and earth-fault conditionsWith fault current signal;
The way of output of described DSP module is divided into manual output and status switch output;
Manually, under the pattern of output, can change at any time amplitude, phase place and the frequency of output signal, and the amplitude of superposed signal,Phase place and frequency;
Under the pattern of status switch output, user sets in advance parameter before output, while comprising output signal parameter and State-outputBetween, status switch has been exported rear described output-controlling device and has been stopped output;
Described data acquisition unit comprises measurement module, data acquisition module, microprocessor module and record wave memory module; InstituteState measurement module the AC signal of collection is transferred to described data acquisition module; Described data acquisition module is by the interchange letter gatheringNumber input to record wave memory module, after AC signal being changed and calculated simultaneously, result of calculation is inputed to microprocessorModule, and the original interchange data that gather are inputed to record wave memory module; Described microprocessor module is by result of calculation and adoptingThe original AC signal of collection inputs to host computer;
Described measurement module comprises ac voltage measurement module and ac current measurement module, respectively to ac voltage signal with exchangeCurrent signal is measured;
Described record wave memory module comprises large capacity nonvolatile memory, for storing in short-term ac voltage signal, alternating currentStream signal, fault detector status information and temporal information;
Described control harvester comprises intake state detection module, reception of wireless signals module, FPGA and optical-fibre communications mouldPiece; Described intake state detection module detects intake signal, the corresponding contact status signal obtaining; Described wireless signal connectsReceive module and receive fault detector wireless signal, and the wireless signal receiving is resolved, obtain fault detector action and multipleReturn status information; Described FPGA gathers contact status signal and wireless telecommunications information, by optical fiber communication modules by contact stateSignal and wireless telecommunications information send to output-controlling device, and receive the acquisition configuration order that output-controlling device is sent;
Described intake signal comprises idle contact intake signal and level contact intake signal; Described contact status signal comprisesIdle contact status signal and level contact status signal;
Described automatic test module control AC signal output, collects test letter by data acquisition unit and control harvesterNumber, and the status information returned of fault detector, form and comprise output, feedback and the automatic checkout system of monitoring.
CN201310478541.0A 2013-10-14 2013-10-14 A kind of distribution line failure indicator automatic checkout system CN103529417B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310478541.0A CN103529417B (en) 2013-10-14 2013-10-14 A kind of distribution line failure indicator automatic checkout system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201310478541.0A CN103529417B (en) 2013-10-14 2013-10-14 A kind of distribution line failure indicator automatic checkout system

Publications (2)

Publication Number Publication Date
CN103529417A CN103529417A (en) 2014-01-22
CN103529417B true CN103529417B (en) 2016-05-25

Family

ID=49931573

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201310478541.0A CN103529417B (en) 2013-10-14 2013-10-14 A kind of distribution line failure indicator automatic checkout system

Country Status (1)

Country Link
CN (1) CN103529417B (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104090252B (en) * 2014-06-19 2017-02-15 航天科工深圳(集团)有限公司 Comprehensive detecting system and method for cable type fault indicator
CN104111434A (en) * 2014-07-16 2014-10-22 云南电力试验研究院(集团)有限公司电力研究院 Detection method for fault indicator of physical simulating model
CN104698337A (en) * 2015-02-13 2015-06-10 威胜电气有限公司 Online recording method of fault indicators
CN104914392A (en) * 2015-05-13 2015-09-16 云南电网有限责任公司电力科学研究院 Distribution network fault indicator intelligent tester
CN105158718B (en) * 2015-09-30 2018-02-06 福建奥通迈胜电力科技有限公司 A kind of fault detector integrated test facility and test system
CN106291426A (en) * 2016-08-04 2017-01-04 国网江西省电力公司电力科学研究院 A kind of fault detector dynamic model test platform
CN106483488A (en) * 2016-10-26 2017-03-08 国网江西省电力公司电力科学研究院 Current transformer based on ratio DC superposition method anti-DC performance detection method
CN107247247A (en) * 2017-05-31 2017-10-13 国网江西省电力公司电力科学研究院 A kind of fault detector detection platform
CN107907791A (en) * 2017-10-31 2018-04-13 国网湖南省电力公司 A kind of automatic checkout system and detection method of distribution network failure indicator
CN107942196A (en) * 2017-11-17 2018-04-20 广东电网有限责任公司电力科学研究院 A kind of test device and method of distribution line field working conditions harvester
CN110456297B (en) * 2019-09-02 2020-12-01 上海金智晟东电力科技有限公司 Fault indicator testing arrangement

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3728620A (en) * 1971-07-14 1973-04-17 J Heins Transmission line fault indicator and locator utilizing variable frequency source coupled to one end of line
CN102073027A (en) * 2010-11-04 2011-05-25 中国电力科学研究院 Method for detecting action performance of failure indicator
CN201926754U (en) * 2010-12-03 2011-08-10 中国电力科学研究院 Intelligent function detecting device of distribution network short circuit fault indicator
CN102364355A (en) * 2011-10-12 2012-02-29 华北电力大学 Test device for performance of overhead line fault indicator
CN202383280U (en) * 2011-12-19 2012-08-15 南京丹迪克科技开发有限公司 Detection device of power line fault indicator
CN102890259A (en) * 2012-10-26 2013-01-23 广西电网公司电力科学研究院 Line fault indicator detecting system

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3728620A (en) * 1971-07-14 1973-04-17 J Heins Transmission line fault indicator and locator utilizing variable frequency source coupled to one end of line
CN102073027A (en) * 2010-11-04 2011-05-25 中国电力科学研究院 Method for detecting action performance of failure indicator
CN201926754U (en) * 2010-12-03 2011-08-10 中国电力科学研究院 Intelligent function detecting device of distribution network short circuit fault indicator
CN102364355A (en) * 2011-10-12 2012-02-29 华北电力大学 Test device for performance of overhead line fault indicator
CN202383280U (en) * 2011-12-19 2012-08-15 南京丹迪克科技开发有限公司 Detection device of power line fault indicator
CN102890259A (en) * 2012-10-26 2013-01-23 广西电网公司电力科学研究院 Line fault indicator detecting system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
配电线路故障指示器测试仪的设计;李克文 等;《广东电力》;20130831;第26卷(第8期);参见第78-80页 *

Also Published As

Publication number Publication date
CN103529417A (en) 2014-01-22

Similar Documents

Publication Publication Date Title
CN102608452B (en) High speed train equipment state and electric energy quality monitoring system and method
CN103414251B (en) A kind of substation network communication analogue system based on IEC61850
CN202057784U (en) Online calibrating and digital online monitoring system for electric energy meter
CN103278791B (en) The electronic mutual inductor amplitude phase error check system that Networkable detects
CN103051065B (en) The distributed FA interlock method of testing of a kind of power distribution automation and system
CN201327517Y (en) Integrated detection device of electric power terminal
CN102590700B (en) Based on pole line fast fault locating method and the device of time synchronized
EP2985613A1 (en) Method and system for detecting and locating single-phase ground fault on low current grounded power-distribution network
CN204269811U (en) Electric energy meter remote online monitoring system
CN103837852B (en) All-fiber electronic current transformer frequency characteristic test device and method of testing
CN102073029B (en) Electronic mutual inductor test system and test method
CN102819004A (en) Comprehensive detecting and analyzing platform for performance of digital electric energy metering systems of intelligent transformer substations
CN202210151U (en) System for remote checking and monitoring for electric energy metering device
CN103165201B (en) Nuclear power station power detection system and method
CN202548240U (en) Automated test platform for photovoltaic grid-connected micro-inverter
CN101982792B (en) Test system and method for measurement error and EMS frequency automatic matching of intelligent electric energy meter
CN102437650B (en) Intelligent electric power distribution system
CN104267374A (en) Online detecting and state assessing system of metering device
CN102510127A (en) Method for unifying models of on-line monitored first and secondary equipment of power grid
CN202720296U (en) Platform for detecting function and performance of power distribution automatic terminal apparatus
CN202351347U (en) Monitoring terminal device for distribution transformer
CN204177912U (en) Based on Distribution Network Failure early warning and the positioning system of GIS application
CN102305922B (en) On-load detection method and device for intelligent optical fiber electric energy meter in substation
CN202351412U (en) DC power supply module intelligent detecting system
CN202583315U (en) On-line monitoring system for transformer iron core grounding current

Legal Events

Date Code Title Description
PB01 Publication
C06 Publication
SE01 Entry into force of request for substantive examination
C10 Entry into substantive examination
GR01 Patent grant
C14 Grant of patent or utility model