CN104142421A - Substation equipment insulation online monitoring system and working method thereof - Google Patents
Substation equipment insulation online monitoring system and working method thereof Download PDFInfo
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- CN104142421A CN104142421A CN201310165822.0A CN201310165822A CN104142421A CN 104142421 A CN104142421 A CN 104142421A CN 201310165822 A CN201310165822 A CN 201310165822A CN 104142421 A CN104142421 A CN 104142421A
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- leakage current
- moa
- line voltage
- monitoring system
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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
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1236—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of surge arresters
-
- 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
-
- 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
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
-
- 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
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
Abstract
The invention discloses a substation equipment insulation online monitoring system. The system comprises a current measuring device for measuring leakage currents of an MOA or capacitive equipment. The current measuring device comprises a first transformer, a second transformer, a synchronization ADC, a CPU and a communication module, wherein the first transformer is used for acquiring leakage current signals of the MOA or the capacitive equipment, the second transformer is used for acquiring voltage signals of a power grid, the synchronization ADC is connected with the first transformer and the second transformer, the CPU is connected with the synchronization ADC, and the communication module is connected with the CPU. In the system, a method for measuring the resistance leakage currents of the MOA or the capacitive equipment includes the steps that W sample data of power grid voltages and the leakage current signals of the MOA or the capacitive equipment are synchronously sampled at equal intervals; the m1 subharmonic amplitude and the initial phase angle of the power grid voltages are acquired; the m2 subharmonic amplitude and the initial phase angle of the leakage currents are acquired; the effective value of the resistance leakage currents is calculated based on the harmonic superposition principle; the initial phase angles of the power grid voltages and the leakage currents are calculated; the projected angle of the leakage currents on the power grid voltages is acquired according to a projection method; the resistance leakage currents are calculated.
Description
Technical field
The present invention relates to a kind of converting equipment insulated on-line monitoring system and method for work thereof.
Background technology
At present, the experiment work of China's Substation Electric Equipment, is mainly still according to the requirement of electrical equipment preventative " testing regulations " and regularly carries out preventive trial.Carry out the running status of judgment device according to the result of test, thereby determine whether it can continue to put into operation.Adhere to that for a long time preventive trial plays a significant role the safe operation of China's electric system, but along with electric system high capacity, Towards Higher Voltage and structure complicated, along with the development of industrial and agricultural production, the requirement of the safe reliability index to electric system is also more and more higher.This traditional test and diagnostic method have seemed more inadaptable, and main manifestations needs to have a power failure at the trial, and the test period is long.Cause few power transmission amount and economic life to bring certain impact, this is just difficult to timely tracing trouble defect.Along with being in full swing of high-tension apparatus repair based on condition of component work, set up the system of a set of Real-Time Monitoring converting equipment running status, be very necessary for converting equipment state estimation, venture analysis, fault diagnosis, Strategies of Maintenance decision-making provide technical support.
Metal oxide arrester (be called for short MOA) is used widely because of its superior overvoltage protection characteristic in electric system; but MOA resistor disc is aging and cause fault through being heated with impact failure meeting; seriously may cause its blast; lightning arrester punctures also can cause substation bus bar short circuit; affect system safety operation, therefore must carry out strict effectively detection and regular preventive trial to operating MOA.In the detection and test of Zinc-Oxide Arrester, leakage current measurement under ac operation voltage is an important project, and the size of the resistive current first harmonics composition in leakage current can more accurately reflect the defects such as Zinc-Oxide Arrester makes moist, the aging and built-in electrical insulation of valve block is impaired.Therefore, the parameters such as resistive leakage current first-harmonic being carried out to Measurement accuracy just can differentiate MOA performance comparatively exactly.
The parameters such as the resistive leakage current of MOA testing current in resistance property application of installation frequency analysis technology to operating MOA detect, and then judge the performance of MOA.Described proving installation is generally made up of MOA Leakage Current sensor, line voltage sensor, signal conditioning circuit, data acquisition circuit, CPU and corresponding analysis software.MOA Leakage Current sensor generally adopts current transformer, and string is located in the ground wire of lower end of MOA, obtains the Leakage Current of MOA; Line voltage sensor generally adopts voltage transformer (VT), is arranged near the voltage signal that obtains electrical network PT equipment; Voltage, the current signal that signal conditioning circuit is sent sensor here is transformed to the voltage signal that is applicable to Acquisition Circuit sampling; By data acquisition circuit, the signal after conditioning is sampled, then complete analysis and the detection to harmonic wave by analysis software, and then obtain the resistive Leakage Current of MOA.The precision that prior art is obtained the resistive Leakage Current of MOA is lower, and this has affected accuracy and reliability to MOA performance criteria.
The frequency that so-called same periodic signal frequently refers to two periodic signals is identical; The initial phase angle of so-called periodic signal, refers to: for periodic signal f (t)=f (t+kT), and (wherein: k ∈ Z is integer, T is the cycle), initial phase angle
in formula: t
0for from the nearest zero crossing of initial point; So-called phase differential refers to: two poor with periodic signal initial phase angles frequently.
Phase difference measurement has great significance in fields such as power equipment state monitoring, signal collection and analysis, communication, automatic controls.Conventional method for measuring phase difference has zero passage method, relevant function method and waveform transformation method etc. multiple.
Zero passage method comprises zero-crossing timing method and zero passage voltage relative method etc.
Zero-crossing timing method is the mistiming of sense cycle signal zero crossing, and the method needs accurately to determine zero crossing time and high-precision timing device, but the method for conventional definite zero crossing often exists larger error.
Zero passage voltage relative method is to measure two sine waves then to calculate phase differential by sine relation in the voltage difference of near zero-crossing point, having in harmonic wave situation, the phasing degree and the voltage magnitude that use zero-crossing method to measure are phasing degree and the voltage magnitude of the vector superposed waveform of each harmonic, and do not meet sinuso sine protractor.
Relevant function method is to use zero moment of the cross correlation function value of two same frequency sinusoidal signals to obtain phase differential to the principle that its phase differential is directly proportional.But due to the comparatively difficulty of determining of zero-crossing timing, and space interference is also not completely uncorrelated in the situation that having fixing interference source, therefore measuring accuracy cannot ensure.
Waveform transformation method is periodic signal to be converted to other waveforms such as triangular wave, sawtooth wave, square wave to measure afterwards its phase differential, and these class methods are distortion of zero passage detection method, have similar measurement drawback.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of converting equipment insulated on-line monitoring system and method for work thereof, to pass through to obtain high-precision phase difference measurement result, obtain the resistive leakage current of high-precision MOA or capacitive apparatus, and then improve accuracy and reliability to MOA or capacitive apparatus performance criteria.
For solving the problems of the technologies described above, the invention provides a kind of converting equipment insulated on-line monitoring system, it comprises: flush bonding processor, the touch-screen being connected with this flush bonding processor, network communication interface, multiple serial ports and relay; Described serial ports is connected with the current measuring device for measuring MOA or capacitive apparatus leakage current; This current measuring device comprises: for obtaining first mutual inductor of leakage current signal of MOA or capacitive apparatus, be used for the second mutual inductor of the voltage signal that obtains electrical network, synchronize ADC, the communication module that synchronize the connected CPU of ADC with this, is connected with this CPU with this first, second mutual inductor is connected; Described CPU is connected with flush bonding processor by described serial ports; Described relay is for controlling the power supply of described current measuring device.
Two current sensors are transformed to voltage signal tested current signal, then by digitized measurement system, signal are carried out to integer-period sampled (ADC) and the accurate synchronous DFT processing of improvement type, obtain first-harmonic vector and the phase place angle thereof of these two signals.If do not consider the phase distortion problem of voltage transformer (VT) (PT), can calculate easily the fundametal compoment peak I of the dielectric loss Tan δ value of capacitance type equipment Cx and the current in resistance property of lightning arrester equipment MOA
rP.Compared with phase place zero passage relative method in the past, the great advantage of the method is not need complicated analog signal processing circuit, and the stability of long-term work is guaranteed, and can effectively suppress harmonic wave disturbing effect.Actual measurement shows, even if the harmonic signal content in tested current signal is identical with first-harmonic content, also can not impact dielectric loss and current in resistance property result.
The method of work of above-mentioned converting equipment insulated on-line monitoring system, it comprises: the measuring method of the resistive leakage current of MOA or capacitive apparatus, this measuring method comprises:
(a) W sampled data of the Leakage Current signal of synchronized sampling line voltage and described MOA or capacitive apparatus uniformly-spaced;
(b) adopt harmonic analysis method to obtain the m of line voltage to above-mentioned W sampled data
1subharmonic amplitude V
k1and initial phase angle
k1=1 ..., m
1; Meanwhile, obtain the m of described Leakage Current
2subharmonic amplitude I
k2and initial phase angle
k2=1 ..., m
2; Described m
1, m
2be not less than respectively the higher harmonics number of times of described line voltage and Leakage Current signal discrete frequency spectrum;
(c) apply humorous superposition principle of wave
calculate the effective value I of described Leakage Current;
(d) initial phase angle of calculating line voltage and described Leakage Current
with
(e) obtain the projected angle of Leakage Current on line voltage according to sciagraphy
(f) calculate the resistive Leakage Current of described MOA or capacitive apparatus
Described uniformly-spaced synchronized sampling is respectively to line voltage and the described Leakage Current signal N point of sampling in one-period simultaneously, and sample frequency is f
s=Nf, and N>=64, the frequency that f is line voltage.
Preferred as one, described step (d) is according to the initial phase angle of following initial phase angle equation computation period signal:
wherein,
for harmonic wave phase angle, A
kfor harmonic amplitude, k ∈ Z is integer; Calculate described initial phase angle
with
time, the value of m is respectively described m
1, m
2.
As the preferred scheme of another kind, described step (d) adopts following steps:
(1), get
(2), substitution
calculate
(3), substitution
calculate
(4), obtain with calculating
with
substitution
calculate new
(5), repeating step (2), (3), (4) until
convergence or meet accuracy requirement.
Preferably, described m
1, m
2the number of times of subharmonic is by the higher harmonics number of times of tested periodic signal and desired analysis precision and do corresponding selection, but should not be less than the higher harmonics number of times of tested periodic signal discrete spectrum.
W determines by sampling number N in the cycle and selected harmonic analysis method, and while changing (FFT) method as adopted discrete fourier to change (DFT) method or fast Fourier, W=nN(n is the periodicity of sampling); Accurate synchronized harmonics analytic approach determines by integration method, and conventional integration method has complexification trapezoidal integration method W=nN, complexification rectangular integration method W=n (N-1), iterative Simpson integration method W=n (N-1)/2 etc.The measuring accuracy of method for measuring phase difference of the present invention determines by sampling number N in the cycle and selected harmonic analysis method, and calculating process can not bring measuring error, can obtain high-precision measurement result.
With respect to prior art, good effect of the present invention is:
(1) measuring method of the resistive leakage current of MOA of the present invention or capacitive apparatus, be mainly used in the measurement quality of the resistive Leakage Current that improves MOA or capacitive apparatus, obtain high-precision resistive Leakage Current, and then improve accuracy and reliability to MOA or capacitive apparatus performance criteria.The measuring accuracy of method for measuring phase difference of the present invention determines by sampling number N in the cycle and selected harmonic analysis method, and calculating process can not bring measuring error, can obtain high-precision measurement result.
(2) converting equipment insulated on-line monitoring system of the present invention is a set of power transformation high voltage electric equipment for 35kV above, implement the total solution of status monitoring and diagnosis, be adapted to monitor leakage current, current in resistance property and movement counting and isoparametric monitoring actuation time of the end shield electric current of power transformer sleeve pipe in service, reactor, mutual inductor, coupling condenser and dielectric loss and electric capacity, lightning arrester and in bus communication mode, Monitoring Data be sent to collection control collecting unit in digital form.This monitoring system can independent self-organizing system also can with the integrated design of intelligent substation monitoring system, by Ethernet, Monitoring Data is sent to integrated information platform, the Monitoring Data of several monitoring system of electric substation can be pooled to the data management diagnostic system on upper strata, realize the high voltage equipment insulation on-line monitoring system in Duo Zuo transformer station is concentrated to monitoring managing.User utilizes LAN (Local Area Network) can obtain at any time Monitoring Data result.
(3) measuring method of the resistive leakage current of MOA of the present invention or capacitive apparatus is digital measuring process, in measuring process, only need to carry out synchronized sampling to two tested same periodic signals frequently according to sample frequency fs, then carry out computing according to harmonic analysis method and initial phase angle equation, just can obtain two initial phase angles
with
finally calculate their phase differential
in measuring process, do not need to add other hardware circuit, digital realization.
Brief description of the drawings
Fig. 1 is the structured flowchart of converting equipment insulated on-line monitoring system of the present invention;
Fig. 2 is the structured flowchart of the current measuring device of measurement MOA of the present invention or capacitive apparatus leakage current.
Embodiment
Provide preferred embodiment of the present invention below in conjunction with accompanying drawing, to describe technical scheme of the present invention in detail.
As shown in Figure 1, the converting equipment insulated on-line monitoring system of the present embodiment comprises: flush bonding processor (ARM11), the touch-screen being connected with this flush bonding processor (preferably A56TFT resistive touch liquid crystal display), network communication interface (comprising: Ethernet, optical fiber interface), keyboard and multiple serial ports and relay.
Described serial ports is connected with the current measuring device for measuring MOA or capacitive apparatus leakage current; This current measuring device comprises: for obtaining first mutual inductor of leakage current signal of MOA or capacitive apparatus, be used for the second mutual inductor of the voltage signal that obtains electrical network, synchronize ADC with this first, second mutual inductor is connected, synchronize the preferred STM32 series A of the connected CPU(of ADC RM processor with this), the communication module that is connected with this CPU; This communication module comprises RS-485 and CAN bus communication module; Parameters can be used the teletransmission of ModBus rtu protocol by RS-485 or CAN bus.
Described CPU is connected with flush bonding processor by described serial ports; Described relay is for controlling the power supply of described current measuring device.
The measuring method of the resistive leakage current of above-mentioned MOA or capacitive apparatus comprises:
(a) W sampled data of the Leakage Current signal of synchronized sampling line voltage and described MOA or capacitive apparatus uniformly-spaced: f (i), i=0,1 ..., W-1} and { f
2(i), i=0,1 ..., W-1}.W determines by sampling number N in the cycle and selected harmonic analysis method, and while changing (FFT) method as adopted discrete fourier to change (DFT) method or fast Fourier, W=nN(n is the periodicity of sampling); Accurate synchronized harmonics analytic approach determines by integration method, and conventional integration method has complexification trapezoidal integration method W=nN, complexification rectangular integration method W=n (N-1), iterative Simpson integration method W=n (N-1)/2 etc.
(b) adopt harmonic analysis method to obtain the m of line voltage to above-mentioned W sampled data
1subharmonic amplitude { V
k1, k1=1 ..., m
1and initial phase angle
meanwhile, obtain the m of described Leakage Current
2subharmonic amplitude { I
k2, k2=1 ..., m
2and initial phase angle
described m
1, m
2be not less than respectively the higher harmonics number of times of described line voltage and Leakage Current signal discrete frequency spectrum, also can be by the higher harmonics number of times of tested periodic signal and desired analysis precision and do corresponding selection;
(c) apply humorous superposition principle of wave
calculate the effective value I of described Leakage Current;
(d) initial phase angle of calculating line voltage and described Leakage Current
with
(e) obtain the projected angle of Leakage Current on line voltage according to sciagraphy
(f) calculate the resistive Leakage Current of described MOA or capacitive apparatus
Described uniformly-spaced synchronized sampling is respectively to line voltage and the described Leakage Current signal N point of sampling in one-period simultaneously, and sample frequency is f
s=Nf, and N>=64, the frequency that f is line voltage.
Preferred as one, described step (d) is according to the initial phase angle of following initial phase angle equation computation period signal:
wherein,
for harmonic wave phase angle, A
kfor harmonic amplitude, k ∈ Z is integer; Calculate described initial phase angle
with
time, the value of m is respectively described m
1, m
2.
As the preferred scheme of another kind, described step (d) adopts following steps:
(1), get
(2), substitution
calculate
(3), substitution
calculate
(4), obtain with calculating
with
substitution
calculate new
(5), repeating step (2), (3), (4) until
convergence or meet accuracy requirement.
Above-described specific embodiment; object of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the foregoing is only specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any amendment of making, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (4)
1. a converting equipment insulated on-line monitoring system, is characterized in that comprising: flush bonding processor, the touch-screen being connected with this flush bonding processor, network communication interface, multiple serial ports and relay;
Described serial ports is connected with the current measuring device for measuring MOA or capacitive apparatus leakage current;
This current measuring device comprises: for obtaining first mutual inductor of leakage current signal of MOA or capacitive apparatus, be used for the second mutual inductor of the voltage signal that obtains electrical network, synchronize ADC, the communication module that synchronize the connected CPU of ADC with this, is connected with this CPU with this first, second mutual inductor is connected;
Described CPU is connected with flush bonding processor by described serial ports;
Described relay is for controlling the power supply of described current measuring device.
2. a method of work for converting equipment insulated on-line monitoring system as claimed in claim 1, it comprises: the measuring method of the resistive leakage current of MOA or capacitive apparatus, this measuring method comprises:
(a) W sampled data of the Leakage Current signal of synchronized sampling line voltage and described MOA or capacitive apparatus uniformly-spaced;
(b) adopt harmonic analysis method to obtain the m of line voltage to above-mentioned W sampled data
1subharmonic amplitude V
k1and initial phase angle
k1=1 ..., m
1; Meanwhile, obtain the m of described Leakage Current
2subharmonic amplitude I
k2and initial phase angle
k2=1 ..., m
2; Described m
1, m
2be not less than respectively the higher harmonics number of times of described line voltage and Leakage Current signal discrete frequency spectrum;
(c) apply humorous superposition principle of wave
calculate the effective value I of described Leakage Current;
(d) initial phase angle of calculating line voltage and described Leakage Current
with
(e) obtain the projected angle of Leakage Current on line voltage according to sciagraphy
(f) calculate the resistive Leakage Current of described MOA or capacitive apparatus
3. the method for work of converting equipment insulated on-line monitoring system as claimed in claim 2, is characterized in that: described uniformly-spaced synchronized sampling is respectively to line voltage and the described Leakage Current signal N point of sampling in one-period simultaneously, and sample frequency is f
s=Nf, and N>=64, the frequency that f is line voltage.
4. the method for work of converting equipment insulated on-line monitoring system as claimed in claim 2, is characterized in that: when described harmonic analysis method is discrete fourier method of changing or fast Fourier method of changing, and W=nN, n is the periodicity of sampling.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310165822.0A CN104142421B (en) | 2013-05-07 | 2013-05-07 | Converting equipment insulated on-line monitoring system and method for work thereof |
| CN201611013801.7A CN106443307B (en) | 2013-05-07 | 2013-05-07 | Transformer equipment insulated on-line monitoring system |
| CN201611013773.9A CN106597229B (en) | 2013-05-07 | 2013-05-07 | The working method of 35kV or more transformer equipment insulated on-line monitoring system |
| CN201611013774.3A CN106707007B (en) | 2013-05-07 | 2013-05-07 | The working method of transformer equipment insulated on-line monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310165822.0A CN104142421B (en) | 2013-05-07 | 2013-05-07 | Converting equipment insulated on-line monitoring system and method for work thereof |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611013773.9A Division CN106597229B (en) | 2013-05-07 | 2013-05-07 | The working method of 35kV or more transformer equipment insulated on-line monitoring system |
| CN201611013774.3A Division CN106707007B (en) | 2013-05-07 | 2013-05-07 | The working method of transformer equipment insulated on-line monitoring system |
| CN201611013801.7A Division CN106443307B (en) | 2013-05-07 | 2013-05-07 | Transformer equipment insulated on-line monitoring system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104142421A true CN104142421A (en) | 2014-11-12 |
| CN104142421B CN104142421B (en) | 2016-12-28 |
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| CN201310165822.0A Active CN104142421B (en) | 2013-05-07 | 2013-05-07 | Converting equipment insulated on-line monitoring system and method for work thereof |
| CN201611013773.9A Active CN106597229B (en) | 2013-05-07 | 2013-05-07 | The working method of 35kV or more transformer equipment insulated on-line monitoring system |
| CN201611013801.7A Active CN106443307B (en) | 2013-05-07 | 2013-05-07 | Transformer equipment insulated on-line monitoring system |
| CN201611013774.3A Expired - Fee Related CN106707007B (en) | 2013-05-07 | 2013-05-07 | The working method of transformer equipment insulated on-line monitoring system |
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| CN201611013773.9A Active CN106597229B (en) | 2013-05-07 | 2013-05-07 | The working method of 35kV or more transformer equipment insulated on-line monitoring system |
| CN201611013801.7A Active CN106443307B (en) | 2013-05-07 | 2013-05-07 | Transformer equipment insulated on-line monitoring system |
| CN201611013774.3A Expired - Fee Related CN106707007B (en) | 2013-05-07 | 2013-05-07 | The working method of transformer equipment insulated on-line monitoring system |
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| CN106154128A (en) * | 2016-07-11 | 2016-11-23 | 国家电网公司 | Containing insulator high pressure equipment built-in electrical insulation detecting system |
| CN109283385A (en) * | 2018-10-17 | 2019-01-29 | 许昌许继软件技术有限公司 | A kind of arrester monitoring data on-line processing method and system |
| CN110244144A (en) * | 2019-05-28 | 2019-09-17 | 许昌许继软件技术有限公司 | A kind of arrester state monitoring method and AC Data Acquisition method |
| CN110716112A (en) * | 2019-11-15 | 2020-01-21 | 国电南京自动化股份有限公司 | Insulation detection method for high-voltage cascaded SVG (static var generator) insulation frame |
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| CN110244144B (en) * | 2019-05-28 | 2021-11-16 | 许昌许继软件技术有限公司 | Lightning arrester state monitoring method and alternating current data acquisition method |
| CN110716112A (en) * | 2019-11-15 | 2020-01-21 | 国电南京自动化股份有限公司 | Insulation detection method for high-voltage cascaded SVG (static var generator) insulation frame |
| CN110716112B (en) * | 2019-11-15 | 2022-01-25 | 国电南京自动化股份有限公司 | Insulation detection method for high-voltage cascaded SVG (static var generator) insulation frame |
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| CN113534007A (en) * | 2021-07-28 | 2021-10-22 | 广东电网有限责任公司 | Lightning arrester leakage current monitoring method and system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106443307B (en) | 2018-12-28 |
| CN106707007A (en) | 2017-05-24 |
| CN106597229B (en) | 2019-11-15 |
| CN106597229A (en) | 2017-04-26 |
| CN104142421B (en) | 2016-12-28 |
| CN106707007B (en) | 2019-03-19 |
| CN106443307A (en) | 2017-02-22 |
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