CN106093820A - The Performance Test System of distribution line failure positioner and method - Google Patents
The Performance Test System of distribution line failure positioner and method Download PDFInfo
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- CN106093820A CN106093820A CN201610452849.1A CN201610452849A CN106093820A CN 106093820 A CN106093820 A CN 106093820A CN 201610452849 A CN201610452849 A CN 201610452849A CN 106093820 A CN106093820 A CN 106093820A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
Abstract
The present invention relates to a kind of Performance Test System and the method for distribution line failure positioner, including: power distribution network digital-to-analogue emulation platform, emulation signal regulating device, fault locator to be measured and the monitoring main website being sequentially connected with；The distribution line of fault, the emulation signal of output distribution circuit is there is in power distribution network digital-to-analogue emulation platform for simulation；Emulation signal regulating device is for being amplified processing to emulation signal；Fault locator to be measured is for the situation of change wave recording according to the emulation signal after processing and amplifying；Monitoring main website is for obtaining fault location test result according to waveform, and arranges position with known fault and contrast, and determines the performance of fault locator to be measured.So the technical scheme that the present invention provides can realize the off-line real-time check to distribution line failure positioner.
Description
Technical field
The present invention relates to power test technical field, particularly relate to a kind of performance based on distribution line failure positioner
Test system and method.
Background technology
Distribution network line is large number of, ruuning situation is complicated, is difficult to be accurately positioned, at causing trouble when breaking down
The reason time is longer, affects greatly to customer power supply reliability.Distribution line failure positioner is a kind of novel band record
The fault detector of wave energy, its maximum feature is when distribution line breaks down, and this device can gather and preserve event automatically
The transient signal of barrier moment, and preserved into the recorded wave file form of standard, by wave file is uploaded to main website, can be
Main website side realizes the accurate judgement to fault.At present, distribution line failure positioner is the most progressively applied in grid company
And popularization, but there is no the effective scheme carrying out functional test for such distribution line failure positioner, the most at present cannot
Determine whether this fault locator self breaks down, detect whether accurately.
Summary of the invention
The technical problem to be solved is how to provide the performance test of a kind of distribution line failure positioner
System.
For this purpose it is proposed, the present invention proposes the Performance Test System of a kind of distribution line failure positioner, including: successively
Power distribution network digital-to-analogue emulation platform, emulation signal regulating device, fault locator to be measured and the monitoring main website connected；
There is the distribution line of fault for simulation in described power distribution network digital-to-analogue emulation platform, exports the imitative of described distribution line
True signal；
Described emulation signal regulating device for being amplified process to described emulation signal；
Described fault locator to be measured is for the situation of change wave recording according to the emulation signal after processing and amplifying；
Described monitoring main website is for obtaining fault location test result according to described waveform, and arranges position with known fault
Contrast, determine the performance of fault locator to be measured.
Preferably, described power distribution network digital-to-analogue emulation platform includes distribution network failure phantom, and described distribution network failure is imitated
Power module that true mode includes being sequentially connected with, the first transformer module, busbar modules, line module；Described line module leads to
Cross the second transformer module connected load module；Described line module connects fault simulation module and electric arc generation module respectively；
The diverse location of described line module is provided with breaker module；
Described busbar modules is for the 10kV bus of imitating substation low-pressure side；
Described line module is for simulating the distribution line of 10kV；
Described load blocks is for the load of analog subscriber side；
Described fault simulation module is used for simulating various line fault；
Described electric arc generation module is used for intermittence when analogue ground fault produces and persistence electric arc.
Preferably, described power module includes the three-phase alternating-current supply that electric pressure is 35kV, is used for simulating power system
The power supply supply of major network side.
Preferably, described first transformer module is 35kV/10kV transformator, and described second transformer module is 10kV/
0.38kV transformator.
Preferably, described line module includes overhead transmission line and cable run.
Preferably, described power distribution network digital-to-analogue emulation platform also includes Real Time Digital Simulator RTDS, and described real-time digital is imitated
True device, for realizing the compiling to described distribution network failure phantom and operation, is joined described in the connection of described Real Time Digital Simulator
The output interface of the emulation signal of electric line；The output interface of described emulation signal connects described emulation signal regulating device.
Preferably, described emulation signal regulating device, including power amplifier module and Current amplifier module, described power is put
Big module connects the output interface of described emulation signal；Described power amplifier module is used for being amplified described emulation signal,
And with the form output voltage signal of analog quantity and current signal；Wherein, the described voltage signal transmission of output is to described to be measured
Fault locator, the described current signal transfer of output to described Current amplifier module, will by described Current amplifier module
Current signal transfer is to described fault locator to be measured.
Preferably, this system also includes: the high accuracy record ripple being connected with the output interface of described emulation signal regulating device
Instrument, described high accuracy oscillograph is for carrying out the voltage signal of described emulation signal regulating device output and current signal in real time
Record.
On the other hand, present invention also offers the system described in a kind of above-mentioned any one and carry out distribution line failure location
The performance test methods of device, the method includes:
There is the distribution line of fault in simulation, exports the emulation signal of described distribution line；
It is amplified described emulation signal processing；
Situation of change wave recording according to the emulation signal after processing and amplifying；
Obtain fault location test result according to described waveform, and position is truly set with fault contrasts, determine and treat
Survey the performance of fault locator.
Preferably, there is the distribution line of fault and include in described simulation:
Build power module, the power supply supply of simulation power system major network side；
Build the first transformer module, simulate the voltage to described power supply and carry out blood pressure lowering；
Build busbar modules, imitating substation low-pressure side 10kV bus；
Build line module, the distribution line of simulation 10kV；
Building the second transformer module, simulation carries out blood pressure lowering to 10kV voltage；
Build load blocks, the load of analog subscriber side；
Build fault simulation module, simulate various line fault；
Build electric arc generation module, intermittence when analogue ground fault produces and persistence electric arc.
The Performance Test System of the distribution line failure positioner that the embodiment of the present invention provides and method, deposited by simulation
At the distribution line of fault, the emulation signal of output distribution circuit, it is amplified this emulation signal processing, makes fault to be measured fixed
Position this amplification of device record emulation signal waveform, obtain fault location test result according to this waveform, by with known fault
Arrange position to contrast, it is possible to determine whether fault locator to be measured self breaks down, so what the present invention provided
Technical scheme can realize the off-line real-time check to distribution line failure positioner.
Accompanying drawing explanation
By being more clearly understood from the features and advantages of the present invention with reference to accompanying drawing, accompanying drawing is schematic and should not manage
Solve as the present invention is carried out any restriction, in the accompanying drawings:
The block schematic illustration of the Performance Test System of the line fault positioner that Fig. 1 provides for the embodiment of the present invention；
The block schematic illustration of the distribution network failure phantom that Fig. 2 provides for the embodiment of the present invention；
The detailed maps of the distribution network failure phantom that Fig. 3 provides for the embodiment of the present invention；
The connection diagram of the power amplifier module that Fig. 4 provides for the embodiment of the present invention；
The connection diagram of the Current amplifier module that Fig. 5 provides for the embodiment of the present invention；
The framework signal of the Performance Test System of the line fault positioner that Fig. 6 provides for another embodiment of the present invention
Figure；
The block schematic illustration of the performance test methods of the line fault positioner that Fig. 7 provides for the embodiment of the present invention；
The simulation waveform of instant of failure power distribution network based on the RTDS digital-to-analogue emulation platform that Fig. 8 provides for the embodiment of the present invention
Schematic diagram；
The current waveform schematic diagram of the instant of failure high accuracy oscillograph record that Fig. 9 provides for the present invention；
The current waveform schematic diagram of the instant of failure distribution line failure positioner record that Figure 10 provides for the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiments of the present invention is described in detail.
As it is shown in figure 1, the invention provides the Performance Test System of a kind of distribution line failure positioner, including: depend on
The power distribution network digital-to-analogue emulation platform 11 of secondary connection, emulation signal regulating device 12, fault locator to be measured 13 and monitoring main website
14；There is the distribution line of fault in described power distribution network digital-to-analogue emulation platform 11, export the emulation of described distribution line for simulation
Signal；Described emulation signal regulating device 12 for being amplified process to described emulation signal；Described fault location to be measured fills
Put 13 for the situation of change wave recording according to the emulation signal after processing and amplifying；Described monitoring main website 14 is for according to described
Waveform obtains fault location test result, and arranges position with known fault and contrast, and determines fault locator 13 to be measured
Performance.
, there is fault by simulation in the Performance Test System of the distribution line failure positioner that the embodiment of the present invention provides
Distribution line, the emulation signal of output distribution circuit, be amplified this emulation signal processing, allow fault locator to be measured
Record the waveform of this amplification emulation signal, obtain fault location test result according to this waveform, by arranging position with known fault
Put and contrast, it is possible to determine whether fault locator to be measured self breaks down, so the technical side that the present invention provides
Case can realize the off-line real-time check to distribution line failure positioner.
Concrete, monitoring main website 14 is responsible for collecting the transient-wave that fault locator 13 to be measured is uploaded, and to each monitoring
The waveform of point automatically analyzes, and extracts fault characteristic value, and then judges abort situation.It should be noted that for
Ensureing normally uploading and resolving of waveform, fault locator 13 to be measured need to use the communication protocol compatible with main website, such as standard
Balanced type 101 stipulations.
On the basis of above-described embodiment, as shown in Figures 2 and 3, it is preferred that described power distribution network digital-to-analogue emulation platform 11 includes
Distribution network failure phantom, described distribution network failure phantom includes power module the 110, first transformator being sequentially connected with
Module 111, busbar modules 112, line module 113；Described line module 113 is by the second transformator 114 module connected load
Module 115；Described line module 113 connects fault simulation module 116 and electric arc generation module 117 respectively；Described line module
The diverse location of 113 is provided with breaker module 118；Described busbar modules 112 is for the 10kV bus of imitating substation low-pressure side；
Described line module 113 is for simulating the distribution line of 10kV；The load for analog subscriber side of the described load blocks 115；Institute
State fault simulation module 116 for simulating various line fault；Described electric arc generation module 117 produces for analogue ground fault
Time intermittence and persistence electric arc.Electric arc generation module can realize singlephase earth fault moment persistence and intermittent electric arc
Occur.
According to its diverse location on described circuit model, there are three kinds of different annexations in breaker module 118,
The first the described busbar modules 112 of connection and described line module 113, the second two sections of described line modules 113 of connection, the 3rd
Plant and connect described line module 113 and transformer module；Transformer module includes the first transformer module 111 and the second transformator
Module 114.
Preferably, described power module 110 includes the three-phase alternating-current supply that electric pressure is 35kV, is used for simulating power train
The power supply supply of system major network side.Described first transformer module 111 is 35kV/10kV transformator, described second transformer module
114 is 10kV/0.38kV transformator.Described line module 113 includes overhead transmission line and cable run.As it is shown on figure 3, circuit I
Being overhead transmission line with circuit II, circuit III and circuit IV are cable run.The physical parameter of circuit can in the light of actual conditions freely
Configuration, including line length, resistance, reactance.All circuits all use the Begeron model of distributed parameters, to realize event
The simulation of barrier overall process transient signal.
Described power distribution network digital-to-analogue emulation platform 11 also includes Real Time Digital Simulator RTDS, and described Real Time Digital Simulator is used
In realizing the compiling to described distribution network failure phantom and operation, described Real Time Digital Simulator connects described distribution line
Emulation signal output interface；The output interface of described emulation signal connects described emulation signal regulating device 12.Wherein, imitative
True signal output interface is primarily referred to as GTAO board, connects RTDS emulator and emulation Signal-regulated kinase, in order to by emulator
Digital signal export to emulating Signal-regulated kinase.
Distribution network failure phantom is based on RTDS (Real Time Digital Simulator, real-timedigital simulation
Device) digital-to-analogue analogue system builds, and is provided with three monitoring points 1,2,3 in model altogether, and the most corresponding three overlap fault location to be measured dress
Put the installation site of 13.Singlephase earth fault is set between monitoring point 2 and 3, and before 2 are positioned at trouble point, 3 are positioned at trouble point
After, 1 is positioned at non-fault line.The emulation signal (current signal and system busbar voltage signal) of three monitoring points is passed through merit
Rate amplifier exports, and current signal is amplified through Current amplifier module 122 more simultaneously.Three overlap fault location to be measured dress
Put 13 to be separately mounted on three groups of coils of Current amplifier module 122, it is achieved real-time to monitoring point 1,2,3 curent change situation
Record.Voltage signal output after amplification is connected simultaneously to the induction field change of the collecting unit of fault locator 13 to be measured
Shell fragment on, with realize to the monitoring of change in voltage in simulation process.Fault locator 13 to be measured by the voltage that monitors and
Curent change wave file is uploaded to monitor main website 14, finally realizes the determination to abort situation in main website side.
On the basis of above-described embodiment, it is preferred that as shown in Figure 4, described emulation signal regulating device 12, including power
Amplification module 121 and Current amplifier module 122, described power amplifier module 121 connects the output interface of described emulation signal；Institute
State power amplifier module 121 for being amplified by described emulation signal, and with the form output voltage signal of analog quantity and electricity
Stream signal；Wherein, the described voltage signal transmission of output is to described fault locator 13 to be measured, the described current signal of output
Transmission is to described Current amplifier module 122, by described Current amplifier module 122 by current signal transfer to described fault to be measured
Positioner 13.
Concrete, power amplifier module 121 1 aspect is connected with the output signal interface (GTAO board) of RTDS emulator,
Realize the amplification to emulation signal and output, on the other hand connect fault locator 13 to be measured and Current amplifier module 122.By
In fault locator 13 to be measured monitoring is the voltage and current of distribution line primary side, therefore uses power amplifier mimic bus one
During secondary physical quantity, need to take into full account the parameters such as its maximum output current, output voltage, power supply capacity and frequency response, with full
The application demand of foot fault locator to be measured.It is said that in general, maximum output voltage need to be more than 120V, power supply capacity need to be more than
400VA, frequency response need to be more than 4kHz.Maximum current output in view of general power amplifier is only capable of reaching tens amperes, therefore needs
Current output interface is attached with Current amplifier module 122, to simulate the electric current of the hundreds of peace of actual track.Power amplification
The connection of module 121 is illustrated as shown in Figure 4.
The connection of Current amplifier module 122 is illustrated as shown in Figure 5.The Main Function of Current amplifier module 122 be realize right
The amplification of power amplifier output current signal, to meet the application requirement of fault locator 13 collecting unit to be measured.Current amplifier mould
Block 122 is made up of the coil of the uniform coiling of some circles, can realize fixing current signal the amplification of multiple, actual amplification master
The coiling number of turns of coil to be depended on.Fault locator 13 to be measured is directly anchored on each coil, and three coils are the most right
Answer A, B, C three-phase of circuit.By the connection of coil Yu power amplifier current output interface, can effectively analog be to circuit once
The monitoring of electric current and acquisition function.
On the basis of above-described embodiment, it is preferred that as shown in Figure 6, the distribution line failure that the embodiment of the present invention provides
The Performance Test System of positioner also includes: the high accuracy record being connected with the output interface of described emulation signal regulating device 12
Ripple instrument 15, described high accuracy oscillograph 15 is for the voltage signal exporting described emulation signal regulating device 12 and current signal
Carry out real time record.
Oscillograph 15 is mainly used to record and preserve the fault waveform in simulation process in high precision, and as benchmark with
The waveform that fault locator 13 to be measured gathers contrasts.Therefore, the requirement for oscillograph is can to read and preserve mark
Accurate comtrade form recorded wave file, carries out the parameters such as amplitude, phase place, harmonic wave simultaneously and is analyzed waveform, and its sampling
Frequency should be higher than that the 4kHz sample frequency of fault locator 13 to be measured.
Concrete, during test, first in power distribution network digital-to-analogue emulation platform 11 based on RTDS, build typical power distribution network
Fault simulation model, and set circuit and component parameters.During emulation, by physical quantitys such as line voltage distribution, electric current, power by imitative
True signal output interface is connected to power amplifier module 121, after export through power amplifier.In view of power amplifier module 121
The analogue signal being still secondary side of output, its amplitude is strictly limited by power amplifier amplification, and distribution line fault to be measured
What positioner 13 was monitored is the primary current situation of change of actual track, and therefore also needing to will by Current amplifier module 122
Secondary current is converted into the primary current being applicable to fault locator 13 to be measured monitoring application.Fault locator 13 to be measured is same
Time be connected with power amplifier module 121 and Current amplifier module 122, output signal in real time record simulation process change feelings
Condition；The wave file of record is uploaded to collect unit by the indicator of fault locator 13 to be measured, and eventually through wireless public affairs
Reach monitoring main website 14 on the net, main website realize the judgement to line fault, determine that location of fault occurs, by setting with known
Put location of fault to contrast, such that it is able to judge whether fault locator to be measured self exception occurs.
On the other hand, as it is shown in fig. 7, present invention also offers the performance test side of a kind of distribution line failure positioner
Method, the method uses the Performance Test System of above-mentioned distribution line failure positioner, and the method includes:
S1: simulation exists the distribution line of fault, exports the emulation signal of described distribution line；
S2: be amplified described emulation signal processing；
S3: according to the situation of change wave recording of the emulation signal after processing and amplifying；
S4: obtain fault location test result according to described waveform, and position is truly set with fault contrasts, determine
The performance of fault locator to be measured.
, there is fault by simulation in the performance test methods of the distribution line failure positioner that the embodiment of the present invention provides
Distribution line, the emulation signal of output distribution circuit, be amplified this emulation signal processing, allow fault locator to be measured
Record the waveform of this amplification emulation signal, obtain fault location test result according to this waveform, by arranging position with known fault
Put and contrast, it is possible to determine whether fault locator to be measured self breaks down, so the technical side that the present invention provides
Case can realize the off-line real-time check to distribution line failure positioner.
Preferably, there is the distribution line of fault and include in described simulation: builds power module, simulates power system major network side
Power supply supply；Build the first transformer module, simulate the voltage to described power supply and carry out blood pressure lowering；Build busbar modules, simulation
Substation low-voltage side 10kV bus；Build line module, the distribution line of simulation 10kV；Build the second transformer module, simulation
10kV voltage is carried out blood pressure lowering；Build load blocks, the load of analog subscriber side；Build fault simulation module, simulate various line
Road fault；Build electric arc generation module, intermittence when analogue ground fault produces and persistence electric arc.
Test case: based on said system and method, the performance of the distribution line failure positioner of certain producer is carried out
Test, test content includes stable state record ripple precision, transient state record ripple precision and fault location function.
(1) stable state record ripple accuracy test
The power frequency electric of six groups of difference amplitude sizes of 5A, 10A, 40A, 100A, 300A, 500A is exported respectively by test system
Stream signal, manually triggers high accuracy oscillograph and fault locator carries out stable state record ripple, investigates the sampling of fault locator
Precision.Owing to the sample frequency of oscillograph can be set higher than fault locator, when therefore calculating error, use high accuracy
The sampled value of oscillograph is as benchmark, and test result is as shown in table 1.
Table 1 stable state record ripple accuracy test result
(2) transient state record ripple accuracy test
Five groups of single-phase earth fault current waveforms, contrast high accuracy oscillograph and fault location dress is exported by test system
Put the waveform of record, calculate the faulted phase current peak-peak instantaneous error that both instant of failures collect.Error Calculation with
On the basis of 600A load current, using fiducial error to be estimated, test result is as shown in table 2.
Table 2 transient state record ripple accuracy test result
(3) fault location function test
According to above-mentioned testing scheme, put up phantom, connect each device, list is set in circuit I a certain position
Phase earth fault, Dynamic simulation, is automatically triggered record ripple and is uploaded to main website, investigating main website side for fault by fault locator
The accuracy of location determination.Test result: fault is between monitoring point 2 and 3.If the abort situation that test result obtains,
The abort situation of setting actual with phantom is identical, then this fault locator positioning function to be measured is good.
Wherein, the simulation waveform of instant of failure power distribution network digital-to-analogue emulation platform is as shown in Figure 8；Instant of failure high accuracy record ripple
The current waveform of instrument record is as shown in Figure 9；Current waveform such as Figure 10 of instant of failure distribution network line fault positioner record
Shown in.Wherein, A, B, C represent A, B, C three-phase of circuit respectively.
Although being described in conjunction with the accompanying embodiments of the present invention, but those skilled in the art can be without departing from this
Making various modifications and variations in the case of bright spirit and scope, such amendment and modification each fall within by claims
Within limited range.
Claims (10)
1. the Performance Test System of a distribution line failure positioner, it is characterised in that including: the power distribution network being sequentially connected with
Digital-to-analogue emulation platform, emulation signal regulating device, fault locator to be measured and monitoring main website；
There is the distribution line of fault for simulation in described power distribution network digital-to-analogue emulation platform, exports the emulation letter of described distribution line
Number；
Described emulation signal regulating device for being amplified process to described emulation signal；
Described fault locator to be measured is for the situation of change wave recording according to the emulation signal after processing and amplifying；
Described monitoring main website is for obtaining fault location test result according to described waveform, and arranges position with known fault and carry out
Contrast, determines the performance of described fault locator to be measured.
System the most according to claim 1, it is characterised in that described power distribution network digital-to-analogue emulation platform includes distribution network failure
Phantom, power module that described distribution network failure phantom includes being sequentially connected with, the first transformer module, bus mould
Block, line module；Described line module passes through the second transformer module connected load module；Described line module connects event respectively
Barrier analog module and electric arc generation module；The diverse location of described line module is provided with breaker module；
Described busbar modules is for the 10kV bus of imitating substation low-pressure side；
Described line module is for simulating the distribution line of 10kV；
Described load blocks is for the load of analog subscriber side；
Described fault simulation module is used for simulating various line fault；
Described electric arc generation module is used for intermittence when analogue ground fault produces and persistence electric arc.
System the most according to claim 2, it is characterised in that described power module includes the three-phase that electric pressure is 35kV
Alternating current power supply, for simulating the power supply supply of power system major network side.
System the most according to claim 2, it is characterised in that described first transformer module is 35kV/10kV transformator,
Described second transformer module is 10kV/0.38kV transformator.
System the most according to claim 2, it is characterised in that described line module includes overhead transmission line and cable run.
System the most according to claim 2, it is characterised in that described power distribution network digital-to-analogue emulation platform also includes real-time digital
Emulator RTDS, described Real Time Digital Simulator is for realizing the compiling to described distribution network failure phantom and operation, institute
State the output interface that Real Time Digital Simulator connects the emulation signal of described distribution line；The output interface of described emulation signal is even
Connect described emulation signal regulating device.
System the most according to claim 6, it is characterised in that described emulation signal regulating device, including power amplification mould
Block and Current amplifier module, described power amplifier module connects the output interface of described emulation signal；Described power amplifier module
For described emulation signal is amplified, and with the form output voltage signal of analog quantity and current signal；Wherein, output
The transmission of described voltage signal is to described fault locator to be measured, the described current signal transfer of output to described Current amplifier mould
Block, by described Current amplifier module by current signal transfer to described fault locator to be measured.
System the most according to claim 7, it is characterised in that this system also includes: with described emulation signal regulating device
Output interface connect high accuracy oscillograph, described high accuracy oscillograph for described emulation signal regulating device output
Voltage signal and current signal carry out real time record.
9. use the system described in claim 1-8 any one to carry out the performance test side of distribution line failure positioner
Method, it is characterised in that including:
There is the distribution line of fault in simulation, exports the emulation signal of described distribution line；
It is amplified described emulation signal processing；
Situation of change wave recording according to the emulation signal after processing and amplifying；
Obtain fault location test result according to described waveform, and position is truly set with fault contrasts, determine to be measured therefore
The performance of barrier positioner.
Method the most according to claim 9, it is characterised in that described simulation exists the distribution line of fault and includes:
Build power module, the power supply supply of simulation power system major network side；
Build the first transformer module, simulate the voltage to described power supply and carry out blood pressure lowering；
Build busbar modules, imitating substation low-pressure side 10kV bus；
Build line module, the distribution line of simulation 10kV；
Building the second transformer module, simulation carries out blood pressure lowering to 10kV voltage；
Build load blocks, the load of analog subscriber side；
Build fault simulation module, simulate various line fault；
Build electric arc generation module, intermittence when analogue ground fault produces and persistence electric arc.
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| CN106324544A (en) * | 2016-11-10 | 2017-01-11 | 华北电力科学研究院有限责任公司 | WAMS performance testing system and method based on RTDS |
| CN107219488A (en) * | 2017-08-03 | 2017-09-29 | 许昌开普检测技术有限公司 | A kind of digitlization real-time simulation platform suitable for fault detector automatic detection |
| CN109521331A (en) * | 2018-12-18 | 2019-03-26 | 国网重庆市电力公司电力科学研究院 | A kind of power distribution network applies the automatization test system of signal generation apparatus outside |
| CN112260331A (en) * | 2020-12-21 | 2021-01-22 | 中国电力科学研究院有限公司 | Extra-high voltage alternating current-direct current power grid simulation platform and construction method |
| CN112305372A (en) * | 2020-09-24 | 2021-02-02 | 国网吉林省电力有限公司电力科学研究院 | Detection platform of transmission line fault area positioning device |
| CN112993988A (en) * | 2021-03-05 | 2021-06-18 | 国网河南省电力公司经济技术研究院 | Power grid line loss analysis method |
| CN113433502A (en) * | 2021-07-28 | 2021-09-24 | 武汉市华英电力科技有限公司 | Capacitance and inductance tester calibration method and device based on waveform simulation |
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