CN102645619B - Evaluating method of electric equipment partial discharge detection system and electric equipment partial discharge detection device - Google Patents
Evaluating method of electric equipment partial discharge detection system and electric equipment partial discharge detection device Download PDFInfo
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- CN102645619B CN102645619B CN201210123958.0A CN201210123958A CN102645619B CN 102645619 B CN102645619 B CN 102645619B CN 201210123958 A CN201210123958 A CN 201210123958A CN 102645619 B CN102645619 B CN 102645619B
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Abstract
The invention provides an evaluating method of electric equipment partial discharge detection system and an electric equipment partial discharge detection device. The method comprises the steps of using a GIS (Geographic Information System) test section to arrange the signal detection of a manual defect evaluating system; evaluating the external synchronization function availability of the system by using a multi-power frequency period simulation voltage signal which is generated by a signal generator, wherein the amplitude of the signal generator is adjustable; evaluating a discharge databank of the system by taking the multi-power frequency period simulation voltage signal as the reference; inputting a sensor direct measurement wave form recovered in mode of equivalent simulation into a partial discharge detection system based on an amplitude difference and a time interval difference so as to evaluate the functions of the system, such as detection sensibility, phase spectrogram, detection type evaluation, tendency analysis and the like; and evaluating the detection frequency band of the system based on the wave form frequency difference. The method has the outstanding advantages of evaluation universalization, key parameter index measurability, comprehensiveness, wide applicability and the like.
Description
Technical field
The invention belongs to power equipment Partial Discharge Detecting Technology field, be particularly useful for the systematicness test and appraisal to power equipment partial discharge detecting system self.
Background technology
Cause a performance greatly of insulation harm as power equipment electricity, shelf depreciation is extensively present among all types of operational outfits.Due to the limitation of manufacturing process, the requirement of working voltage, avoid moving shelf depreciation in power equipment completely be impossible or irrational, but local discharging level to the calling hierarchy that limits insulating material is to be necessary, even necessary.
For the detection of local discharge of electrical equipment, from there being very early research, and along with the improving constantly of technical merit, detection method, in expansion, detects performance and is promoting, and detects principle perfect.The application means that detect as meeting operation on-the-spot test requirement are put in ultrasonic, ultrahigh frequency office, have application comparatively widely in actual motion power equipment.
The core that detection is put in office is that detection, feature information extraction, the phase place spectrogram of weak signal reduce, database analysis, the variation of electric discharge trend etc. of typical spectrogram.But under sensor-based running environment, the test of the true waveform of shelf depreciation, separation, reduction are the bases of Partial Discharge Detection, and this just relates to Partial Discharge characteristic parameter.
For shelf depreciation: the pulse current method of testing of laboratory applications has strict test foundation, calibration steps, connection principle; But be applied to operation on-the-spot ultrasonic, ultrahigh frequency method of testing reference frame deficiency, diagnositc decision is fuzzy, the detection of the performances such as detection sensitivity, reference spectrum database, defect type assessment, trend analysis, measurement bandwidth or index has difficulties, not entirely, situation that system even cannot not carried out, and the test and appraisal Shortcomings of partial discharge detecting system itself, there is application and judge aspect contradiction with shelf depreciation band electro-detection or the on-line monitoring demand of on-the-spot operational outfit.
Test and appraisal Shortcomings actual conditions based on above-mentioned partial discharge detecting system itself, in conjunction with basis, the core of Partial Discharge Detection, propose a kind of power equipment partial discharge detecting system assessment method.Mainly based on actual measurement Partial Discharge, utilize multifunctional signal generator, by the analog voltage signal of the serializing amplitude difference of generation, time interval difference, frequency difference is inputed to partial discharge detecting system, deep its key parameter index of test and appraisal comprehensively.
Summary of the invention
The object of the invention is to the practical problems of the test and appraisal Shortcomings that solves partial discharge detecting system itself, mainly by the equivalent simulation reduction to actual measurement Partial Discharge, utilize multifunctional signal generator, the simulating signal of reduction is carried out to serializing taking the time as benchmark, by the amplitude difference, time interval difference, the frequency difference that input to simulating signal in partial discharge detecting system, evaluate and test partial discharge detecting system.
The present invention realizes by following technical proposal.
A kind of power equipment partial discharge detecting system assessment method, the present invention utilizes GIS test section to arrange artificial defect, the waveform that detecting sensor coordinates high-speed oscilloscope directly to measure is put in office, and after equivalent simulation reduction, the office of inputing to puts in detection system, the signal property examined of evaluating system; By the adjustable many power frequency periods analog voltage signal of amplitude of signal generator generation, put the outer synchronous input of detection system through office, the outer synchronizing function availability of evaluating system; Taking many power frequency periods analog voltage signal phase place as benchmark, the direct measured waveform of sensor of equivalent simulation reduction is put in detection system to the discharge data storehouse of evaluating system with the time series office of inputing to; Based on amplitude difference, time interval difference, detection system is put in the direct measured waveform input of the sensor office of equivalent simulation reduction, the detection sensitivity of evaluating system, phase place spectrogram, defect type assessment, trend analysis function; In the direct waveform envelope of sensor measurement, based on waveform frequency difference, detection system is put in simulating signal input office, the measurement bandwidth of evaluating system.
Detection system of the present invention is: signal generator is connecting analog signal generator, external synchronization signal generator, actual measurement PD meter respectively; Actual measurement PD meter is connected with high-speed oscilloscope, high-speed oscilloscope is connected with signal amplifier, signal amplifier connects respectively sonac and uhf sensor, two ends obtain the GIS test section of uhf sensor and bottom and a cavity of the cavity capping on top composition, on the GIS of cavity bottom test section, be provided with and be connected with artificial defect, center conductor is positioned at cavity, and airtight supporting insulator is positioned at uhf sensor top.
The invention has the beneficial effects as follows, the present invention is mainly based on actual measurement Partial Discharge, utilize multifunctional signal generator, by the analog voltage signal of the serializing amplitude difference of generation, time interval difference, frequency difference is inputed to partial discharge detecting system, comprehensively deep its key parameter index of test and appraisal, have that test and appraisal universalization, key parameter index can quantize, comprehensive, test and appraisal directly, the remarkable advantage such as applicability is wide.
Further set forth content of the present invention below in conjunction with accompanying drawing and example.
Brief description of the drawings
Fig. 1 is the schematic diagram of assessment method;
Fig. 2 is the schematic diagram of assessment method.
Embodiment
The invention belongs to a kind of power equipment partial discharge detecting system assessment method, it is characterized in that, the method is:
(1) utilize GIS test section to arrange artificial defect, the waveform that detecting sensor coordinates high-speed oscilloscope directly to measure is put in office, after equivalent simulation reduction, the office of inputing to puts in detection system, the signal property examined of evaluating system;
(2), by the adjustable many power frequency periods analog voltage signal of amplitude of signal generator generation, put the outer synchronous input of detection system through office, the outer synchronizing function availability of evaluating system;
(3), taking many power frequency periods analog voltage signal phase place as benchmark, the direct measured waveform of sensor of equivalent simulation reduction is put in detection system to the discharge data storehouse of evaluating system with the time series office of inputing to;
(4), based on amplitude difference, time interval difference, detection system is put in the direct measured waveform input of the sensor office of equivalent simulation reduction, the detection sensitivity of evaluating system, phase place spectrogram, defect type assessment, trend analysis function;
(5), in the direct waveform envelope of sensor measurement, based on waveform frequency difference, detection system is put in simulating signal input office, the measurement bandwidth of evaluating system.
Detection system of the present invention is: signal generator 1 is connecting analog signal generator 3, external synchronization signal generator 4, actual measurement PD meter 16 respectively; Actual measurement PD meter 16 is connected with high-speed oscilloscope 15, high-speed oscilloscope 15 is connected with signal amplifier 14, signal amplifier 14 connects respectively sonac 12 and uhf sensor 13, two ends obtain uhf sensor 13 and form a cavity with the GIS test section 7 of bottom and the cavity capping 10 on top, on the GIS of cavity bottom test section 7, be provided with and be connected with artificial defect 9, center conductor 8 is positioned at cavity, and airtight supporting insulator 11 is positioned at uhf sensor 13 tops.
See Fig. 1, the figure shows the schematic diagram of assessment method.In figure, 1 is multifunctional signal generator, can put waveform generation four type simulation signals 3 based on actual measurement office: 1. the reduction of waveform equivalent simulation is put in office; 2. waveform is put in the serializing office of equivalent simulation reduction; 3. waveform is put in the serializing office that amplitude is variable, the time interval is variable of equivalent simulation reduction; 4. in discharge waveform envelope, waveform is put in the serializing office of changeable frequency.2 put detection system for office, and 6 is the analyzing and diagnosing interface that detection system is put in office, and 5 is that detection system input channel is put in office.The outer synchronously simulating voltage signal 4 of many power frequency periods producing by multifunctional signal generator 1, can input office put detection system 2, as the benchmark of whole test and appraisal.
See Fig. 2, the figure shows the schematic diagram of assessment method.In figure, 1 is signal generator; Center conductor 8, artificial defect 9, cavity capping 10, airtight supporting insulator 11 form GIS test section 7, mainly for generation of real shelf depreciation; By sonac 12, or uhf sensor 13, through signal amplifier 14, by high-speed oscilloscope 15, can show that actual measurement office puts waveform 16; Put waveform 16 according to actual measurement office, signal generator 1 can produce equivalent simulation reduction waveform 17; Signal generator 1 can produce the adjustable many power frequency periods analog voltage signal 18 of amplitude, puts the synchronous base of detection system for office; Put the envelope of waveform 16 in conjunction with actual measurement office, signal generator 1 also can produce the waveform 19 of changeable frequency in envelope; According to 17,18, can further carry out the adjustment in amplitude, the time interval to the equivalent simulation recovering signal producing, represent with the form of serializing waveform 20,21,22.
Claims (2)
1. a power equipment partial discharge detecting system assessment method, is characterized in that, the method is:
(1) utilize GIS test section to arrange artificial defect, the waveform that detecting sensor coordinates high-speed oscilloscope directly to measure is put in office, after equivalent simulation reduction, input in partial discharge detecting system the signal property examined of evaluating system;
(2) the adjustable many power frequency periods analog voltage signal of amplitude signal generator being produced, through the outer synchronous input of partial discharge detecting system, the outer synchronizing function availability of evaluating system;
(3), taking many power frequency periods analog voltage signal phase place as benchmark, the direct measured waveform of sensor of equivalent simulation reduction is inputed in partial discharge detecting system to the discharge data storehouse of evaluating system with time series;
(4) based on amplitude difference, time interval difference, by direct the sensor of equivalent simulation reduction measured waveform input partial discharge detecting system, the detection sensitivity of evaluating system, phase place spectrogram, defect type assessment, trend analysis function;
(5) in the direct waveform envelope of sensor measurement, based on waveform frequency difference, simulating signal is inputted to partial discharge detecting system, the measurement bandwidth of evaluating system.
2. the device of a kind of power equipment partial discharge detecting system assessment method according to claim 1, is characterized in that, signal generator (1) is connecting analog signal generator (3), external synchronization signal generator (4), actual measurement PD meter (16) respectively; Actual measurement PD meter (16) is connected with high-speed oscilloscope (15), high-speed oscilloscope (15) is connected with signal amplifier (14), signal amplifier (14) connects respectively sonac (12) and uhf sensor (13), the uhf sensor (13) at two ends forms a cavity with the cavity capping (10) on the GIS test section (7) of bottom and top, on the GIS of cavity bottom test section (7), be connected with artificial defect (9), center conductor (8) is positioned at cavity, and airtight supporting insulator (11) is positioned at uhf sensor (13) top.
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| CN106019094A (en) * | 2016-05-18 | 2016-10-12 | 西安交通大学 | Three-dimensional analysis method and system for partial discharge under oscillating-type impact voltage |
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| CN113009301A (en) * | 2021-03-17 | 2021-06-22 | 云南电网有限责任公司电力科学研究院 | Device and method for rapidly evaluating host of ultrahigh frequency partial discharge detection equipment |
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