CN110470936A - A kind of leakage conductor testing current in resistance property method and device - Google Patents
A kind of leakage conductor testing current in resistance property method and device Download PDFInfo
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- CN110470936A CN110470936A CN201910908170.2A CN201910908170A CN110470936A CN 110470936 A CN110470936 A CN 110470936A CN 201910908170 A CN201910908170 A CN 201910908170A CN 110470936 A CN110470936 A CN 110470936A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
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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
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Abstract
This application discloses a kind of leakage conductor testing current in resistance property method and devices, persistently obtain where leakage conductor the total current real-time waveform on route at voltage transformer secondary side real time voltage waveforms and leakage conductor, real time voltage waveforms are determined the standard time of voltage sample point by big-dipper satellite, and total current real-time waveform is determined the standard time of current sample point by big-dipper satellite；According to total current real-time waveform and simultaneously real time voltage waveforms of section, current in resistance property is calculated.The technical solution of the application can utilize the precision time service function synchronizing voltage and current waveform and phase signal of big-dipper satellite, the location information of leakage conductor is obtained by the positioning function of big-dipper satellite, according to the line length of the path of transmission line of electricity acquisition substation to leakage conductor, to correct measurement point because of phase difference caused by distributed inductance, so as to effectively obtain resistive current component according to the phase difference of voltage and electric current.
Description
Technical field
This application involves technical field of electric power more particularly to a kind of leakage conductor testing current in resistance property method and devices.
Background technique
Leakage conductor is the important equipment on transmission line of electricity, it mainly carries the effect of limitation line over-voltage, is prevented
Only overvoltage invasion destroys other power equipments, and power circuit and electric power plant station equipment is enable to be safely operated.Route is lightning-arrest
Device bears exposing to the weather, may be such that arrester aging damage in the environment of radiation exposure in chemical erosion, elegance and talent, the sun
Dampness.Leakage current increases after leakage conductor dampness, so that arrester fever is even exploded, so detection leakage conductor is
Whether no dampness, insulation are very important.
The detection test of leakage conductor mainly has power failure test and DC leakage-current test, and both of which needs to have a power failure
Test, and need to remove leakage conductor from shaft tower, disassembly process is extremely difficult, and cannot effectively find defect in time.
And the charging test of leakage conductor, development can be charged, can judge that route is lightning-arrest by parameters such as total current, current in resistance property
The dampness situation of device, charging test are referred to as the test of the current in resistance property under service condition.Current in resistance property test needs accurate
The voltage of arrester and the phase angle difference of electric current are obtained, the consistency of electric current and voltage clocks is needed.But near leakage conductor
No TV cannot obtain the information of voltage of the field location nearby, therefore voltage transformer obtains from the substation at route both ends, distance
Far, may be without signal of communication in remote substation, and there is delay in communications, and there are distributed inductances, capacitor in route, far
Away from transmission of electricity from there is phase angle difference, the test for leakage conductor can be all influenced.
Therefore, how the current in resistance property of effectively measuring leakage conductor becomes that those skilled in the art are urgently to be resolved asks
Topic.
Summary of the invention
This application provides a kind of leakage conductor testing current in resistance property method and devices, to solve existing measurement route
The method of the current in resistance property of arrester can not effectively measuring current in resistance property the problem of.
In a first aspect, the embodiment of the present application provides a kind of leakage conductor testing current in resistance property method, comprising:
Persistently obtain voltage transformer secondary side real time voltage waveforms and leakage conductor on the route of leakage conductor place
The total current real-time waveform at place, route both ends are respectively equipped with the first substation and the second substation where the leakage conductor,
The real time voltage waveforms are determined the standard time of voltage sample point by big-dipper satellite, and the total current real-time waveform is defended by Beidou
Star determines the standard time of current sample point；
According to the total current real-time waveform and simultaneously real time voltage waveforms of section, current in resistance property is calculated.
With reference to first aspect, described according to the total current real-time waveform in a kind of achievable mode of first aspect
The step of simultaneously real time voltage waveforms of section, calculating current in resistance property, comprising:
According to the satellite positioning location of leakage conductor and line route information, calculate leakage conductor respectively with route
The distance of upper starting point substation and terminal substation；
According to the voltage waveform phase angle and leakage conductor difference under the real time voltage waveforms standard time
At a distance from starting point substation on route and terminal substation, the voltage-phase lag starting point substation of leakage conductor is calculated
Angle；
According to the angle and the real time voltage waveforms, the voltage wave for calculating leakage conductor when there is current in resistance property
Shape；
Phase phase in voltage waveform and total current real-time waveform when by the leakage conductor with current in resistance property
Same part is determined as resistive current component.
With reference to first aspect, in a kind of achievable mode of first aspect, leakage conductor is calculated according to the following formula
Voltage-phase lag starting point substation angle:
Wherein, l1For the leakage conductor on route at a distance from starting point substation, l2For the leakage conductor and line
The distance of road terminal substation,For the voltage waveform phase angle under the real time voltage waveforms standard time.
With reference to first aspect, in a kind of achievable mode of first aspect, leakage conductor is calculated according to the following formula
Voltage waveform when with current in resistance property:
Wherein, U=g (t) is the real time voltage waveforms.
With reference to first aspect, in a kind of achievable mode of first aspect, in the satellite according to leakage conductor
Position location and line route information, calculate leakage conductor respectively with starting point substation on route and terminal substation away from
From before, further includes:
Determined electric energy in the direction of propagation of conducting wire according to the phase angle of voltage waveform under the standard time, wherein in electricity
The substation for pressing advanced direction is starting point substation, and the substation in voltage delay direction is terminal substation.
Second aspect, the embodiment of the present application provide a kind of leakage conductor testing current in resistance property device, comprising:
Waveform obtains module, the voltage transformer secondary side real-time voltage on route where persistently obtaining leakage conductor
Total current real-time waveform at waveform and leakage conductor, route both ends are respectively equipped with the first power transformation where the leakage conductor
It stands and the second substation, the real time voltage waveforms is determined the standard time of voltage sample point, the total current by big-dipper satellite
Real-time waveform is determined the standard time of current sample point by big-dipper satellite；
Current in resistance property computing module, for according to the total current real-time waveform and the simultaneously real-time voltage wave of section
Shape calculates current in resistance property.
In conjunction with second aspect, in a kind of achievable mode of second aspect, the current in resistance property computing module includes:
Metrics calculation unit calculates outlet for the satellite positioning location and line route information according to leakage conductor
Road arrester is respectively at a distance from starting point substation on route and terminal substation；
Angle calculation unit, for according under the real time voltage waveforms standard time voltage waveform phase angle and institute
Leakage conductor is stated respectively at a distance from starting point substation on route and terminal substation, calculates the voltage-phase of leakage conductor
Lag the angle of starting point substation；
Waveshape unit, for according to the angle and the real time voltage waveforms, calculating leakage conductor to have resistance
Voltage waveform when property electric current；
Current in resistance property determination unit, for voltage waveform when the leakage conductor to have to current in resistance property and described complete
The identical part of phase is determined as resistive current component in electric current real-time waveform.
In conjunction with second aspect, in a kind of achievable mode of second aspect, the angle calculation unit is according to following public
Formula calculates the angle of the voltage-phase lag starting point substation of leakage conductor:
Wherein, l1For the leakage conductor on route at a distance from starting point substation, l2For the leakage conductor and line
The distance of road terminal substation,For the voltage waveform phase angle under the real time voltage waveforms standard time.
In conjunction with second aspect, in a kind of achievable mode of second aspect, the waveshape unit is according to following public
The voltage waveform that formula calculates leakage conductor when having current in resistance property:
Wherein, U=g (t) is the real time voltage waveforms.
In conjunction with second aspect, in a kind of achievable mode of second aspect, the current in resistance property computing module further include:
Direction of propagation determination unit, for being determined electric energy in conducting wire according to the phase angle of voltage waveform under the standard time
The direction of propagation, wherein the advanced direction of voltage substation be starting point substation, voltage delay direction substation be eventually
Point substation.
From the above technical scheme, the embodiment of the present application provide a kind of leakage conductor testing current in resistance property method and
Device persistently obtains where leakage conductor on route at voltage transformer secondary side real time voltage waveforms and leakage conductor
Total current real-time waveform, route both ends are respectively equipped with the first substation and the second substation, real-time voltage where leakage conductor
Waveform is determined the standard time of voltage sample point by big-dipper satellite, and total current real-time waveform determines current sample point by big-dipper satellite
Standard time；According to total current real-time waveform and simultaneously real time voltage waveforms of section, current in resistance property is calculated.The application's
Technical solution can pass through big-dipper satellite using the precision time service function synchronizing voltage and current waveform and phase signal of big-dipper satellite
Positioning function obtain leakage conductor location information, according to the path of transmission line of electricity obtain substation arrive leakage conductor
Line length, to correct measurement point because of phase difference caused by distributed inductance, so as to effectively according to the phase of voltage and electric current
Difference obtains resistive current component.
Detailed description of the invention
In order to illustrate more clearly of the technical solution of the application, attached drawing needed in case study on implementation will be made below
Simply introduce, it should be apparent that, for those of ordinary skills, in the premise of not making the creative labor property
Under, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is a kind of flow chart of leakage conductor testing current in resistance property method provided by the embodiments of the present application；
Fig. 2 is the line construction schematic diagram of installation leakage conductor provided by the embodiments of the present application；
Fig. 3 is a kind of structural block diagram of leakage conductor testing current in resistance property device provided by the embodiments of the present application.
Specific embodiment
In order to make those skilled in the art better understand the technical solutions in the application, below in conjunction with attached drawing, it is right
Technical solution in the embodiment of the present application is clearly and completely described.
Fig. 1 is a kind of flow chart of leakage conductor testing current in resistance property method provided by the embodiments of the present application.Such as Fig. 1 institute
Show, the step of leakage conductor testing current in resistance property method provided by the embodiments of the present application is as follows:
S101, voltage transformer secondary side real time voltage waveforms and route are kept away on route where persistently obtaining leakage conductor
Total current real-time waveform at thunder device, route both ends are respectively equipped with the first substation and the second power transformation where the leakage conductor
It stands, the real time voltage waveforms are determined the standard time of voltage sample point by big-dipper satellite, and the total current real-time waveform is by north
Bucket satellite determines the standard time of current sample point.First substation and the second substation pass through Satellite Communication Receive real-time voltage
It is additionally provided with primary processor in waveform and total current real-time waveform, the first substation and the second substation, for handling waveform signal.
Wherein, real time voltage waveforms can be indicated with U=g (t), and total current real-time waveform can be indicated with I=f (t).
Fig. 2 is the line construction schematic diagram of installation leakage conductor provided by the embodiments of the present application.As shown in Fig. 2, online
It is obtained at the line voltage transformer 1 of first substation A of road head and the tail and the line voltage transformer 7 of the second substation B
The real time voltage waveforms signal of route can take single-phase or take three-phase.Its implementation is by 3 He of the first primary processor
Voltage acquisition unit on second primary processor 5 is respectively in the secondary terminals case 2 of corresponding voltage mutual inductor 1 and voltage transformer 7
Secondary terminals case 6 secondary terminals at obtain.Voltage acquisition unit point on first primary processor 3 and the second primary processor 5
Not Tong Guo big-dipper satellite timing function synchronised clock, respectively obtain standard time clock under time-voltage waveform U=g (t), first
Primary processor 3 persistently obtains voltage signal and temporarily stores, and the second primary processor 5 is by time TB∈[tb1,tb2] waveform pass through
Satellite communication transmission is into the first primary processor 3 in the station A.It is kept away described in being obtained at the electric discharge counting of surveyed leakage conductor 8
The real-time total current information of the leakage current of thunder device, total current real-time waveform is transferred in current acquisition terminal 4, current acquisition
Terminal 4 gives current acquisition synchronizing clock signals by big-dipper satellite timing function synchronised clock, persistently obtains the standard time-
Information is simultaneously reached the first primary processor 3 in substation A by satellite communication by current waveform I=f (t).
S102 calculates current in resistance property according to the total current real-time waveform and simultaneously real time voltage waveforms of section.This
The process that current in resistance property is calculated in application embodiment is realized in the first substation by primary processor, can be understood as entirely with the period
Electric current real-time waveform and real time voltage waveforms are entirely in time TB∈[tb1,tb2] obtain in the period, wherein time TB∈[tb1,
tb2] waveform by the second substation by satellite communication transmission to the first substation.
In addition, also needing to determine electricity according to the phase angle of voltage waveform under the standard time before calculating current in resistance property
It can be in the direction of propagation of conducting wire, wherein the substation in the advanced direction of voltage is starting point substation, the change in voltage delay direction
Power station is terminal substation.
Further, determining electric energy after the direction of propagation of conducting wire further include:
S201 calculates leakage conductor difference according to the satellite positioning location of leakage conductor and line route information
At a distance from starting point substation on route and terminal substation；Wherein it is possible to use l1Indicate starting point on leakage conductor and route
The distance of substation, uses l2Indicate leakage conductor on route at a distance from terminal substation.
T is intercepted out from the waveform of storage by the first primary processor 3B∈[tb1,tb2] waveform compare same standard when
The station A obtains time-voltage waveform U=g (t) with the station B same phase collected under clock, proposes its fundamental wave letter by Fourier transformation
NumberWithCompareWithValue, it is biggish be current spread
Starting point.
S201, according to the voltage waveform phase angle and the leakage conductor under the real time voltage waveforms standard time
Respectively at a distance from starting point substation on route and terminal substation, the voltage-phase lag starting point power transformation of leakage conductor is calculated
The angle stood；Wherein, the angle of the voltage-phase lag starting point substation of leakage conductor is calculated according to the following formula:
Wherein, l1For the leakage conductor on route at a distance from starting point substation, l2For the leakage conductor and line
The distance of road terminal substation,For the voltage waveform phase angle under the real time voltage waveforms standard time.
S201, according to the angle and the real time voltage waveforms, the electricity for calculating leakage conductor when there is current in resistance property
Corrugating；The voltage waveform that leakage conductor is calculated according to the following formula when there is current in resistance property:
Wherein, U=g (t) is the real time voltage waveforms.
S201, by the leakage conductor have current in resistance property when voltage waveform and the total current real-time waveform in phase
The identical part in position is determined as resistive current component.That is in total current real-time waveform I=f (t) withThe identical part of phase is resistive current component, leading voltage in I=f (t)
Part be capacitance current.
In calculating current I=f (t) with voltagePhase difference angle θ, total current value be I, it is resistive
Electric current is Icos θ.It can also be further processed to obtain the harmonic wave point of current in resistance property by other methods such as Fourier transformation simultaneously
Amount.
As it can be seen that leakage conductor testing current in resistance property method provided by the embodiments of the present application, can utilize big-dipper satellite
Precision time service function synchronizing voltage and current waveform and phase signal obtain leakage conductor by the positioning function of big-dipper satellite
Location information, according to the path of transmission line of electricity obtain substation to leakage conductor line length, come correct measurement point because
Phase difference caused by distributed inductance, so as to effectively obtain resistive current component according to the phase difference of voltage and electric current.
Fig. 3 is a kind of structural block diagram of leakage conductor testing current in resistance property device provided by the embodiments of the present application.Such as Fig. 3
Shown, leakage conductor testing current in resistance property device provided by the embodiments of the present application includes: that waveform obtains module 31, for continuing
The total current obtained where leakage conductor on route at voltage transformer secondary side real time voltage waveforms and leakage conductor is real
When waveform, route both ends are respectively equipped with the first substation and the second substation, the real-time voltage where the leakage conductor
Waveform is determined the standard time of voltage sample point by big-dipper satellite, and the total current real-time waveform determines that electric current is adopted by big-dipper satellite
The standard time of sampling point；Current in resistance property computing module 32, for according to the total current real-time waveform and the simultaneously reality of section
When voltage waveform, calculate current in resistance property.
Wherein, the current in resistance property computing module includes:
Metrics calculation unit calculates outlet for the satellite positioning location and line route information according to leakage conductor
Road arrester is respectively at a distance from starting point substation on route and terminal substation；
Angle calculation unit, for according under the real time voltage waveforms standard time voltage waveform phase angle and institute
Leakage conductor is stated respectively at a distance from starting point substation on route and terminal substation, calculates the voltage-phase of leakage conductor
Lag the angle of starting point substation；
Waveshape unit, for according to the angle and the real time voltage waveforms, calculating leakage conductor to have resistance
Voltage waveform when property electric current；Current in resistance property determination unit, for the leakage conductor to be had to voltage when current in resistance property
The identical part of phase is determined as resistive current component in waveform and the total current real-time waveform.
The angle calculation unit calculates the voltage-phase lag starting point substation of leakage conductor according to the following formula
Angle:
Wherein, l1For the leakage conductor on route at a distance from starting point substation, l2For the leakage conductor and line
The distance of road terminal substation,For the voltage waveform phase angle under the real time voltage waveforms standard time.
The waveshape unit calculates voltage waveform of the leakage conductor with current in resistance property when according to the following formula:
Wherein, U=g (t) is the real time voltage waveforms.
The current in resistance property computing module further include: direction of propagation determination unit, for according to voltage wave under the standard time
The phase angle of shape determines electric energy in the direction of propagation of conducting wire, wherein the substation in voltage advanced direction is starting point power transformation
It stands, the substation in voltage delay direction is terminal substation.
From the above technical scheme, the embodiment of the present application provide a kind of leakage conductor testing current in resistance property method and
Device persistently obtains where leakage conductor on route at voltage transformer secondary side real time voltage waveforms and leakage conductor
Total current real-time waveform, route both ends are respectively equipped with the first substation and the second substation, real-time voltage where leakage conductor
Waveform is determined the standard time of voltage sample point by big-dipper satellite, and total current real-time waveform determines current sample point by big-dipper satellite
Standard time；According to total current real-time waveform and simultaneously real time voltage waveforms of section, current in resistance property is calculated.The application's
Technical solution can pass through big-dipper satellite using the precision time service function synchronizing voltage and current waveform and phase signal of big-dipper satellite
Positioning function obtain leakage conductor location information, according to the path of transmission line of electricity obtain substation arrive leakage conductor
Line length, to correct measurement point because of phase difference caused by distributed inductance, so as to effectively according to the phase of voltage and electric current
Difference obtains resistive current component.
The application can describe in the general context of computer-executable instructions executed by a computer, such as program
Module.Generally, program module includes routines performing specific tasks or implementing specific abstract data types, programs, objects, group
Part, data structure etc..The application can also be practiced in a distributed computing environment, in these distributed computing environments, by
Task is executed by the connected remote processing devices of communication network.In a distributed computing environment, program module can be with
In the local and remote computer storage media including storage equipment.
Those skilled in the art will readily occur to its of the application after considering specification and practicing application disclosed herein
Its embodiment.This application is intended to cover any variations, uses, or adaptations of the application, these modifications, purposes or
Person's adaptive change follows the general principle of the application and including the undocumented common knowledge in the art of the application
Or conventional techniques.The description and examples are only to be considered as illustrative, and the true scope and spirit of the application are by following
Claim is pointed out.
It should be understood that the application is not limited to the precise structure that has been described above and shown in the drawings, and
And various modifications and changes may be made without departing from the scope thereof.Scope of the present application is only limited by the accompanying claims.
Claims (10)
1. a kind of leakage conductor testing current in resistance property method characterized by comprising
It persistently obtains where leakage conductor on route at voltage transformer secondary side real time voltage waveforms and leakage conductor
Total current real-time waveform, route both ends are respectively equipped with the first substation and the second substation where the leakage conductor, described
Real time voltage waveforms are determined the standard time of voltage sample point by big-dipper satellite, and the total current real-time waveform is true by big-dipper satellite
The standard time of constant current sampled point；
According to the total current real-time waveform and simultaneously real time voltage waveforms of section, current in resistance property is calculated.
2. the method according to claim 1, wherein it is described according to the total current real-time waveform and simultaneously
The step of real time voltage waveforms of section, calculating current in resistance property, comprising:
According to the satellite positioning location of leakage conductor and line route information, calculate leakage conductor respectively with risen on route
The distance of point substation and terminal substation；
According under the real time voltage waveforms standard time voltage waveform phase angle and the leakage conductor respectively with line
The distance of road starting point substation and terminal substation calculates the angle of the voltage-phase lag starting point substation of leakage conductor
Degree；
According to the angle and the real time voltage waveforms, the voltage waveform for calculating leakage conductor when there is current in resistance property；
Phase is identical in voltage waveform and total current real-time waveform when by the leakage conductor with current in resistance property
Part is determined as resistive current component.
3. according to the method described in claim 2, it is characterized in that, calculating the voltage-phase of leakage conductor according to the following formula
Lag the angle of starting point substation:
Wherein, l1For the leakage conductor on route at a distance from starting point substation, l2For on the leakage conductor and route
The distance of terminal substation,For the voltage waveform phase angle under the real time voltage waveforms standard time.
4. according to the method described in claim 2, it is characterized in that, calculating leakage conductor according to the following formula has resistive electricity
Voltage waveform when stream:
Wherein, U=g (t) is the real time voltage waveforms.
5. according to the method described in claim 2, it is characterized in that, in the satellite positioning location according to leakage conductor and
Line route information, calculate leakage conductor respectively at a distance from starting point substation on route and terminal substation before, also
Include:
Determined electric energy in the direction of propagation of conducting wire according to the phase angle of voltage waveform under the standard time, wherein super in voltage
The substation of front direction is starting point substation, and the substation in voltage delay direction is terminal substation.
6. a kind of leakage conductor testing current in resistance property device characterized by comprising
Waveform obtains module, the voltage transformer secondary side real time voltage waveforms on route where persistently obtaining leakage conductor
With the total current real-time waveform at leakage conductor, route both ends where the leakage conductor be respectively equipped with the first substation and
Second substation, the real time voltage waveforms are determined the standard time of voltage sample point by big-dipper satellite, and the total current is real-time
Waveform is determined the standard time of current sample point by big-dipper satellite；
Current in resistance property computing module, for according to the total current real-time waveform and simultaneously real time voltage waveforms of section, meter
Calculate current in resistance property.
7. device according to claim 6, which is characterized in that the current in resistance property computing module includes:
Metrics calculation unit calculates route and keeps away for the satellite positioning location and line route information according to leakage conductor
Thunder device is respectively at a distance from starting point substation on route and terminal substation；
Angle calculation unit, for according to the voltage waveform phase angle and the line under the real time voltage waveforms standard time
Road arrester at a distance from starting point substation on route and terminal substation, calculates the voltage-phase lag of leakage conductor respectively
The angle of starting point substation；
Waveshape unit, for according to the angle and the real time voltage waveforms, calculating leakage conductor to have resistive electricity
Voltage waveform when stream；
Current in resistance property determination unit, voltage waveform and the total current when for by the leakage conductor with current in resistance property
The identical part of phase is determined as resistive current component in real-time waveform.
8. device according to claim 7, which is characterized in that the angle calculation unit calculates route according to the following formula
The angle of the voltage-phase lag starting point substation of arrester:
Wherein, l1For the leakage conductor on route at a distance from starting point substation, l2For on the leakage conductor and route
The distance of terminal substation,For the voltage waveform phase angle under the real time voltage waveforms standard time.
9. device according to claim 7, which is characterized in that the waveshape unit calculates route according to the following formula
Arrester has voltage waveform when current in resistance property:
Wherein, U=g (t) is the real time voltage waveforms.
10. device according to claim 7, which is characterized in that the current in resistance property computing module further include:
Direction of propagation determination unit, for being determined electric energy in the biography of conducting wire according to the phase angle of voltage waveform under the standard time
Broadcast direction, wherein the substation in the advanced direction of voltage is starting point substation, and the substation in voltage delay direction is terminal change
Power station.
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| CN201910908170.2A CN110470936B (en) | 2019-09-25 | 2019-09-25 | Method and device for testing resistive current of line arrester |
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| CN112305352A (en) * | 2020-10-20 | 2021-02-02 | 云南电网有限责任公司电力科学研究院 | Voltage reconstruction MOA resistive current testing method based on in-phase capacitive equipment |
| CN112305348A (en) * | 2020-10-20 | 2021-02-02 | 云南电网有限责任公司电力科学研究院 | Method for quickly testing resistive current of reconstructed MOA (metal oxide arrester) by considering in-phase capacitive equipment |
| CN112305351A (en) * | 2020-10-20 | 2021-02-02 | 云南电网有限责任公司电力科学研究院 | MOA resistive current measuring method for leakage current reconstruction voltage |
| CN112305349A (en) * | 2020-10-20 | 2021-02-02 | 云南电网有限责任公司电力科学研究院 | MOA resistive current rapid measurement method |
| CN112732684A (en) * | 2020-12-10 | 2021-04-30 | 中国西安卫星测控中心 | Denoising method and device for current data of satellite storage battery |
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| CN112305351A (en) * | 2020-10-20 | 2021-02-02 | 云南电网有限责任公司电力科学研究院 | MOA resistive current measuring method for leakage current reconstruction voltage |
| CN112305349A (en) * | 2020-10-20 | 2021-02-02 | 云南电网有限责任公司电力科学研究院 | MOA resistive current rapid measurement method |
| CN112732684A (en) * | 2020-12-10 | 2021-04-30 | 中国西安卫星测控中心 | Denoising method and device for current data of satellite storage battery |
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