CN109507460A - The test method and system of three-phase standard ground electric signal generation method, device and one or two fusion switch Earth Fault Detection functions - Google Patents
The test method and system of three-phase standard ground electric signal generation method, device and one or two fusion switch Earth Fault Detection functions Download PDFInfo
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- CN109507460A CN109507460A CN201811428574.3A CN201811428574A CN109507460A CN 109507460 A CN109507460 A CN 109507460A CN 201811428574 A CN201811428574 A CN 201811428574A CN 109507460 A CN109507460 A CN 109507460A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/28—Provision in measuring instruments for reference values, e.g. standard voltage, standard waveform
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
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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
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Abstract
The invention discloses the test methods and system of a kind of three-phase standard ground electric signal generation method, device and one or two fusion switch Earth Fault Detection functions, three-phase standard ground electric signal generation method includes: to be modulated to ground fault exemplary electrical signal and error compensation, obtains corresponding three-phase wave sequence；Digital-to-analogue conversion, enhanced processing and PI correction process are carried out to the three-phase wave sequence, obtain three-phase standard ground electric signal.The test method includes: the mutual inductor primary side for switching the load of three-phase standard ground electric signal in tested one or two fusions；The electric signal that mutual inductor secondary side exports is sent to mating intelligent terminal；The accuracy of Earth Fault Detection function is judged according to the SOE data sent on intelligent terminal.The present invention can generate high-precision, high stability, high temporal consistency three-phase standard ground electric signal, while can accurately examine one or two times fusion switch Earth Fault Detection function accuracys.
Description
Technical field
The invention belongs to distribution network technology fields, specifically, being related to a kind of three-phase standard ground electric signal generation method, dress
Set and merge for one or two times the test method and system of switch Earth Fault Detection function.
Background technique
One or two fusion switchgears be by Switch equipment and secondary voltage current transformer, state sensor and
The novel intelligent equipment that the equipment such as intelligent terminal are designed for uniformity, mutually merge and are formed, have measurement and transmission agency,
Fault detection and processing function, stabilization function, feeder automation function etc..
To guarantee one or two fusion switchgear reliabilities, primary essence should be carried out to one or two fusion switchgear assemblies
Degree detection (transformer precision detection), connects complete accuracy detection (switchgear ontology and intelligent terminal integration precision detect)
The tests such as earth fault detection function test.
For above-mentioned each detection project, satisfactory detection system there is no at present.It is specific: one or two fusions are opened
Equipment ground fault detection capability is closed, the phase relation that detection logic mainly passes through analysis residual voltage current waveform is sentenced
It is disconnected.Therefore in the verifying of the function accuracy, it is desirable to provide high-precision, high stability, high temporal consistency three-phase mark
Quasi- ground connection electric signal, solves the correction skill of the phase error and time order error that are introduced by detection system frequency characteristic and interchannel noise
Art.
Summary of the invention
It is an object of the invention to overcome deficiency in the prior art, a kind of three-phase standard ground electric signal generation side is provided
The test method and system of method, device and one or two fusion switch Earth Fault Detection functions, can switch one or two fusions
The accuracy of equipment ground fault detection capability is verified, and the reliability of testing result is improved.
In order to achieve the above objectives, the present invention adopts the following technical solutions realization:
In a first aspect, the present invention provides a kind of three-phase standard ground electric signal generation methods, which comprises
Ground fault exemplary electrical signal waveform is modulated, digital modulation signals are obtained；
Error compensation is carried out to the digital modulation signals, obtains corresponding three-phase wave sequence；
Digital-to-analogue conversion, enhanced processing and PI link successively are carried out to the three-phase wave sequence and adjust correction process, is obtained
Three-phase standard ground electric signal.
Second aspect, the present invention provides a kind of three-phase standard ground electric signal generating means, described device includes:
DSP module: for being modulated to ground fault exemplary electrical signal waveform, digital modulation signals are obtained；
FPGA module: error compensation is carried out to the digital modulation signals, obtains corresponding three-phase wave sequence；
D/A conversion module: for carrying out digital-to-analogue conversion to the three-phase wave sequence；
Signal amplification unit: processing is amplified for the three-phase wave sequence after logarithmic mode conversion；
The FPGA module is also used to carry out PI link to the three-phase wave sequence after enhanced processing to adjust correction process.
The third aspect, the present invention provides a kind of test method of one or two fusions switch Earth Fault Detection function, institutes
Stating test method includes:
By the load of three-phase standard ground electric signal in the mutual inductor primary side for being tested one or two fusion switchgears；
The electric signal of the mutual inductor secondary side output of tested one or two fusion switchgears is sent to described tested 1
The intelligent terminal of secondary fusion switchgear；
According to tested one or the two fusion switchgear Earth Fault Detection functions of SOE data judgement of intelligent terminal output
Accuracy.
Fourth aspect, the present invention also provides a kind of test macro of one or two fusions switch Earth Fault Detection function,
The system comprises:
Master station: it is used for output ground fault exemplary electrical signal waveform；
Three-phase standard ground electric signal output unit: for being one or two times tested according to ground fault exemplary electrical signal waveform
The mutual inductor primary side for merging switchgear provides three-phase standard ground electric signal；
The master station is also used to the SOE data judgement of the intelligent terminal output according to tested one or two fusion switchgears
The accuracy of tested one or two fusion switchgear Earth Fault Detection functions.
To sum up, a kind of three-phase standard ground electric signal generation method provided by the invention, device and one or two fusions switch
The test method and system of Earth Fault Detection function can generate three-phase standard according to ground fault exemplary electrical signal waveform and connect
Seismic electrical signal can guarantee the high-precision and high stability that are grounded electric signal, and be able to verify that one or two fusions switch ground connection event
Hinder detection function, improves the reliability of testing result.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to use required in the embodiment of the present invention
Attached drawing be briefly described, it should be apparent that, drawings described below is only some embodiments of the present invention, for ability
For the those of ordinary skill of domain, without creative efforts, it can also be obtained according to these attached drawings other attached
Figure.
Fig. 1 is a kind of structural schematic diagram of tested one or two fusion switchgears；
Fig. 2 is a kind of functional block diagram of the three-phase standard ground electric signal generating means provided according to embodiments of the present invention；
Fig. 3 is error compensation link in the three-phase standard ground electric signal generation method provided according to embodiments of the present invention
Flow chart；
In figure: 1, Switch main body；2,3: voltage transformer；4, intelligent terminal；5, a connecting cable；6, secondary connection electricity
Cable.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings.Following embodiment is only used for clearly illustrating the present invention
Technical solution, and not intended to limit the protection scope of the present invention.
It should be appreciated that electric signal described in the embodiment of the present invention includes voltage signal and current signal, the three-phase standard
Ground connection electric signal refers to (usually single-phase) corresponding three-phase voltage, current signal when ground fault occurs for distribution.Tested one
Secondary fusion switchgear should include: 4, Switch main body 1, voltage transformer 2,3, intelligent terminal connecting cables 5 and two
Secondary connecting cable 6,1 built-in current mutual inductor of Switch main body are specific as shown in Figure 1.Wherein, Switch main body 1 has closure and opens
The function of disconnected normal current and fault current, the secondary side of current transformer are wrapped on annular core and cover in Switch main body 1
In interior each phase, flows through the primary current signal of Switch main body 1 for acquiring and be converted to secondary current signal, through Switch main body 1
Secondary connecting cable pass to intelligent terminal 4；A, B that the primary side of voltage transformer 2 is connected in parallel Switch main body 1 connect
Head, for acquiring the alternate line voltage signal of A, B and being converted to secondary voltage signal, the primary side parallel connection of voltage transformer 3 connects
B, C the phase connector for connecing Switch main body 1, for acquiring the alternate line voltage signal of B, C and being converted to secondary voltage signal；Secondary electricity
Signal is pressed to pass to intelligent terminal 4 through secondary connecting cable；Intelligent terminal 4 has the function of data acquisition, control, protection etc..
Three-phase standard ground electric signal generating means provided in an embodiment of the present invention, as shown in Figure 2, comprising:
DSP module: for being modulated to ground fault exemplary electrical signal waveform, digital modulation signals are obtained；
FPGA module: error compensation is carried out to the digital modulation signals, obtains corresponding three-phase wave sequence；
D/A conversion module: for carrying out digital-to-analogue conversion to the three-phase wave sequence；
Signal amplification unit: processing is amplified for the three-phase wave sequence after logarithmic mode conversion；
The FPGA module is also used to carry out PI link to the three-phase wave sequence after enhanced processing to adjust correction process.
Wherein, the signal amplification unit includes:
Power amplifier: for the three-phase wave sequence after analog-to-digital conversion is tentatively amplified and noise suppressed processing,
Power amplifier has the performance of smooth adjustment simultaneously；
Booster: the three-phase voltage wave sequence for exporting to power amplifier carries out boosting processing；
Current lifting device: the three-phase current wave sequence for exporting to power amplifier carries out up-flow processing.
Wherein, the three-phase standard ground electric signal generating means further include:
Standard mutual inductor: for the three-phase wave sequence after chronologically back production enhanced processing, and to the three-phase waveform of back production
Sequence is depressured or is dropped stream process；
AD back production module: for the secondary electric signal of the output of standard mutual inductor described in back production, and by the secondary electric signal
It is converted into digital back production electric signal.
In order to solve the technical issues of interfering with each other between output loop, three-phase standard ground electricity provided in an embodiment of the present invention
Signal generating apparatus is provided with mutually independent voltage output circuit and electric current output loop.The voltage output circuit includes two
Two phase output terminals of group, the electric current output loop include two groups of three-phase output end.The high-pressure side of electric current output loop and electricity
The high-pressure side of output loop is pressed to carry out equipotential link, so that integrally high potential is presented in electric current output loop over the ground, to realize
The experimental enviroment of high voltage and high current is provided simultaneously.
Therefore, three-phase standard ground electric signal generating means provided in an embodiment of the present invention, according to preset instructions through signal
Processing obtains three-phase standard ground electric signal, can guarantee the high-precision, high stability and high temporal consistency of electric signal；Setting
Mutually independent electric current output loop and voltage output circuit, and by electric current output loop and voltage output loop high-voltage side into
It has gone equipotential link, can be realized while the experimental enviroment of high-voltage large current being provided.
The embodiment of the invention also provides a kind of three-phase standard ground electric signal generation methods, and the method can be used aforementioned
Three-phase standard ground electric signal generating means execute, specifically comprise the following steps:
Step 101: ground fault exemplary electrical signal waveform being modulated, digital modulation signals are obtained；
Specifically, ground fault exemplary electrical signal waveform can pass through practical recording waveform, fault waveform library or fault simulation
Waveform obtains.
Step 102: error compensation being carried out to the digital modulation signals, obtains corresponding three-phase wave sequence；
Specifically, error compensation includes phase error compensation and timing error compensation.
Step 103: digital-to-analogue conversion, enhanced processing and PI link successively being carried out to the three-phase wave sequence and adjusted at correction
Reason obtains three-phase standard ground electric signal.
Specifically, the enhanced processing includes: tentatively to be amplified to the three-phase wave sequence after analog-to-digital conversion and noise
After inhibition processing, then carry out boosting or up-flow processing.
The PI link adjusts correction
S310: the chronologically three-phase wave sequence after back production enhanced processing, and the three-phase wave sequence of back production is dropped
Pressure or drop stream process；
S311: will be depressured or the three-phase wave sequence of drop stream process chronologically compares with ground fault exemplary electrical signal waveform
Compared with obtaining corresponding phase error and time order error；
S312: carrying out the adjusting of PI link according to phase error and time order error, until output three-phase wave sequence is three-phase
Standard ground electric signal waveform.
For the process in the three-phase standard ground electric signal generation method about error correction is described in detail, below with reference to
Fig. 3, for B phase ground fault occurs in certain distribution, to error compensation link in three-phase standard ground electric signal generation method
It is described in further detail.Electric signal possesses frequency component abundant in failure process, examined system frequency characteristic and
The influence of interchannel noise, on the one hand, the phase offset that different frequency component generates in the detection system in single waveform signal is not
Together, so that Overall waveform generates phase error, in the present embodiment, delayed phase after triple-frequency harmonics is converted through signal, transmitted makes
Obtain Overall waveform wave crest lag Δ θ；On the other hand, since channel difference and interchannel noise influence between multiple waveforms, transmission time
Difference, so that generating time order error between wave sequence, in the present embodiment, A phase current waveform transmission time is longer, C phase current
The waveform transfer time is shorter, so that A compares B phase Δ t in advance in output current wave sequence timingAB, B compared to C phase shift to an earlier date Δ
tBC。
To correct above-mentioned error, phase compensation and timing compensation need to be carried out.Specifically, passing through comparison ground fault typical electrical
Signal waveform and three-phase electric signal waveform sequence converted, after transmission, obtain and are generated by system response and interchannel noise
Phase error Δ θ and timing error delta tAB、ΔtBC, and the compensation for carrying out in signals transmission in contrast is realized and is missed
Difference correction.As in the present embodiment, leading phase compensation is carried out to the triple-frequency harmonics of delayed phase, i.e. Overall waveform wave crest moves forward
Δθ′；Advanced timing compensation, i.e., Δ t ' in advance are carried out to the A phase current waveform of timing lagABTransmit A phase current；It is super to timing
Preceding C phase current waveform carries out lag timing compensation, i.e. delay Δ t 'BCTransmit C phase current.Above-mentioned correction course can pass through PI ring
Section is realized.
To sum up, three-phase standard ground electric signal generation method provided in an embodiment of the present invention, according to ground fault typical electrical
Signal waveform electric signal, at the signals such as waveform modulated, error compensation, digital-to-analogue conversion, signal amplification, signal back production, PI adjusting
Reason obtains three-phase standard ground in conjunction with the timing compensation of the noise suppressed of power amplifier, smooth adjustment and FPGA, phase compensation
Voltage, current signal have the characteristics that signal accuracy is high, stability is strong, temporal consistency is good.
Further, as shown in Fig. 2, being a kind of one or two fusions switch Earth Fault Detection function provided in an embodiment of the present invention
The accuracy test macro of energy, the system can be used for the verifying of one or two fusion switch Earth Fault Detection functions, the system
System includes:
Master station: for ground fault exemplary electrical signal waveform in output waveform library, while for according to one or two times tested
The SOE data for merging the intelligent terminal output of switchgear, judge to be tested one or two fusion switchgear Earth Fault Detection function
The accuracy of energy；
Three-phase standard ground electric signal output unit: for being one or two times tested according to ground fault exemplary electrical signal waveform
The mutual inductor primary side for merging switchgear provides three-phase standard ground electric signal；
Wherein, three-phase standard ground electric signal generation unit can generate dress using three-phase standard ground electric signal above-mentioned
It sets, specifically includes: DSP module, the FPGA module (there is PI link to adjust calibration function), D/A conversion module, function of sequential connection
Rate amplifier and booster/current lifting device should also include that standard mutual inductor, AD back production module and mutually independent electric current export back
Road and voltage output circuit.
Meanwhile using three-phase standard ground electric signal generating means described in the present embodiment to one or two fusion switchgears
Earth Fault Detection function when being tested, two groups of three-phase output end of electric current output loop respectively with Switch main body two sides
Three-phase terminal connection；One group of two phase output terminals in voltage output circuit are outer with three-phase standard ground electric signal generating means
Shell is grounded jointly, and another group of two phase output terminals merge the one of the voltage transformer 2 and 3 of switchgear with tested one or two times respectively
End connection, the other end ground connection of voltage transformer 2 and 3.
To sum up, the test macro of one or two fusions switchgear Earth Fault Detection function provided in an embodiment of the present invention,
The Accuracy Verification that can be used for one or two fusion switchgear Earth Fault Detection functions, has filled up one or two fusion switchgears
Earth Fault Detection function lacks the technological gap for effectively examining equipment, is provided using three-phase standard ground electric signal generation unit
Standard ground electric signal can guarantee that the electric signal for detection has high-precision, high stability and high temporal consistency, helps
In the accuracy for improving testing result.
The test method of one or two fusions switchgear Earth Fault Detection function provided in an embodiment of the present invention, including such as
Lower step:
Step 201: being instructed according to master station, by the load of corresponding three-phase standard ground electric signal in tested one or two fusions
The mutual inductor primary side of switchgear；
Step 202: the electric signal of the mutual inductor secondary side output of tested one or two fusion switchgears being sent to described
The intelligent terminal of tested one or two fusion switchgears；
Step 203: according to tested one or the two fusion switchgear ground faults inspection of the SOE data judgement of intelligent terminal output
The accuracy of brake.
The test method of one or two fusion switch Earth Fault Detection functions provided by the embodiment of the present invention can use
The test macro of aforementioned one or two fusions switch Earth Fault Detection function executes, for carrying out to one or two fusion switchgears
The test of Earth Fault Detection function accuracy.The test method using the embodiment of the present invention is explained in detail below:
Testing requirements: test is in one or two fusion switch forwards, and when B phase ground fault occurs for system, one or two fusions are opened
Close the ground fault information that can be correctly detecting rear；
Relevant parameter: the voltage transformer 2 and 3 of one or two fusion switchgears has nominal load 75VA, built-in current
Mutual inductor has 0.5 Ω of nominal load,
Environmental structure: two groups of three-phase terminals of the electric current output loop of three-phase standard ground signal generating apparatus are connect respectively
On the three-phase terminal of Switch main body two sides, one group of two phase output terminals and three-phase standard ground electric signal in voltage output circuit
The shell of generating means is grounded jointly, and the voltage that another group of two phase output terminals merge switchgear with tested one or two times respectively is mutual
One end of the primary side of sensor 2 and 3 connects, the other end ground connection of the primary side of voltage transformer 2 and 3.
The secondary terminals of voltage transformer 2 and 3 and Switch main body of one or two fusion devices pass through secondary connecting cable 6 and connect
Intelligent terminal 4 is connect, is communicated between intelligent terminal 4 and master station by 104 specifications.
According to testing requirements, from being transferred in certain distribution in waveform library, the allusion quotation of B phase ground fault occurs master station for switch forward
Type electric signal waveform, and issue corresponding instruction；
Three-phase standard ground electric signal generating means receive above-mentioned B phase ground fault exemplary electrical signal preset instructions, output
Corresponding three-phase standard ground voltage, three-phase standard ground electric current.Three-phase standard ground voltage is added by voltage output circuit
It is loaded on one or two fusion switching voltage mutual inductors 2 and 3 primary sides, is added three-phase standard ground electric current by electric current output loop
It is loaded on one or two fusion Switch main bodies and its built-in current mutual inductor.The secondary side of voltage transformer 2 and 3 and built-in current mutual inductance
Secondary voltage, secondary current are passed to intelligent terminal 4 by secondary connecting cable 6 by device secondary side；Intelligent terminal 4 is according to secondary
Voltage, secondary current sampling analysis judge whether system occurs the specifying information of ground fault and ground fault, and pass through 104 rule
Send SOE event to master station on about.Master station reads SOE event, and judges to be tested one or two fusion switchgear ground faults
The accuracy of detection function.Specifically, if the SOE event is switch, B phase ground fault occurs for rear, in the testing requirements
Under, it is accurate to be tested one or two fusions switch Earth Fault Detection function；If the SOE event is other information, such as rear is switched not
Ground fault occurs or A phase ground fault occurs for switch rear, then under the testing requirements, is tested one or two fusions switch ground connection
Fault detection capability inaccuracy.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, without departing from the technical principles of the invention, several improvement and deformations can also be made, these improvement and deformations
Also it should be regarded as protection scope of the present invention.
Claims (12)
1. three-phase standard ground electric signal generation method, which is characterized in that the described method includes:
Ground fault exemplary electrical signal waveform is modulated, digital modulation signals are obtained；
Error compensation is carried out to the digital modulation signals, obtains corresponding three-phase wave sequence；
Digital-to-analogue conversion, enhanced processing and PI link successively are carried out to the three-phase wave sequence and adjust correction process, obtains three-phase
Standard ground electric signal.
2. three-phase standard ground electric signal generation method according to claim 1, which is characterized in that the error compensation packet
It includes: phase error compensation and time order error compensation.
3. three-phase standard ground electric signal generation method according to claim 1, which is characterized in that the enhanced processing packet
It includes:
To the three-phase wave sequence after analog-to-digital conversion tentatively amplified and noise suppressed processing after, then carry out boosting or up-flow at
Reason.
4. three-phase standard ground electric signal generation method according to claim 1, which is characterized in that the PI link is adjusted
Correction process includes:
The chronologically three-phase wave sequence after back production enhanced processing, and the three-phase wave sequence of back production is depressured or is dropped at stream
Reason；
Will decompression or drop stream process three-phase wave sequence and ground fault exemplary electrical signal waveform chronologically compared with, obtain accordingly
Phase error and time order error；
Phasing is carried out according to phase error, timing corrections are carried out according to time order error.
5. three-phase standard ground electric signal generating means, which is characterized in that described device includes:
DSP module: for being modulated to ground fault exemplary electrical signal waveform, digital modulation signals are obtained；
FPGA module: error compensation is carried out to the digital modulation signals, obtains corresponding three-phase wave sequence；
D/A conversion module: for carrying out digital-to-analogue conversion to the three-phase wave sequence；
Signal amplification unit: processing is amplified for the three-phase wave sequence after logarithmic mode conversion；
The FPGA module is also used to carry out PI link to the three-phase wave sequence after enhanced processing to adjust correction process.
6. three-phase standard ground electric signal generating means according to claim 5, which is characterized in that the signal amplification is single
Member includes:
Power amplifier: for tentatively being amplified to the three-phase wave sequence after analog-to-digital conversion, noise suppressed and smooth adjustment
Processing；
Booster: the three-phase voltage wave sequence for exporting to power amplifier carries out boosting processing；
And/or
Current lifting device: the three-phase current wave sequence for exporting to power amplifier carries out up-flow processing.
7. three-phase standard ground electric signal generating means according to claim 5, which is characterized in that described device is also wrapped
It includes:
Standard mutual inductor: for the three-phase wave sequence after chronologically back production enhanced processing, and to the three-phase wave sequence of back production
It is depressured or is dropped stream process；
AD back production module: it is converted for the secondary electric signal of the output of standard mutual inductor described in back production, and by the secondary electric signal
At digital back production electric signal.
8. three-phase standard ground electric signal generating means according to claim 5, which is characterized in that described device further includes
Mutually independent voltage output circuit and electric current output loop.
9. the test method of one or two fusion switch Earth Fault Detection functions, which is characterized in that the test method includes:
By the load of three-phase standard ground electric signal in the mutual inductor primary side for being tested one or two fusion switchgears；
The electric signal of the mutual inductor secondary side output of tested one or two fusion switchgears is sent to described tested one or two times to melt
The intelligent terminal of combination switch equipment；
According to the accurate of tested one or the two fusion switchgear Earth Fault Detection functions of SOE data judgement of intelligent terminal output
Property.
10. the test method of one or two fusions switch Earth Fault Detection function according to claim 9, feature exist
In using the described in any item methods acquisition three-phase standard ground electric signals of claim 1 ~ 4.
11. the test macro of one or two fusion switch Earth Fault Detection functions, which is characterized in that the system comprises:
Master station: it is used for output ground fault exemplary electrical signal waveform；
Three-phase standard ground electric signal output unit: for being tested one or two fusions according to ground fault exemplary electrical signal waveform
The mutual inductor primary side of switchgear provides three-phase standard ground electric signal；
The master station is also used to the SOE data of the intelligent terminal output according to tested one or two fusion switchgears, judges quilt
Survey the accuracy of one or two fusion switchgear Earth Fault Detection functions.
12. the test macro of one or two fusions switch Earth Fault Detection function according to claim 11, feature exist
In the three-phase standard ground electric signal output unit includes the described in any item three-phase standard ground telecommunications of claim 5 ~ 8
Number generating means.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN110133489A (en) * | 2019-04-26 | 2019-08-16 | 国网湖北省电力有限公司电力科学研究院 | The simulated failure applying method of breaker singlephase earth fault on one or two fusion serial columns |
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| CN110514997A (en) * | 2019-09-10 | 2019-11-29 | 浙江华电器材检测研究所有限公司 | A kind of detection device detecting breaker |
| CN110514997B (en) * | 2019-09-10 | 2021-06-11 | 浙江华电器材检测研究所有限公司 | Detection device for detecting circuit breaker |
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