CN203037802U - Data measuring storage system achieving transformer high-frequency and ultrahigh-frequency partial discharge monitoring - Google Patents
Data measuring storage system achieving transformer high-frequency and ultrahigh-frequency partial discharge monitoring Download PDFInfo
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- CN203037802U CN203037802U CN 201220683531 CN201220683531U CN203037802U CN 203037802 U CN203037802 U CN 203037802U CN 201220683531 CN201220683531 CN 201220683531 CN 201220683531 U CN201220683531 U CN 201220683531U CN 203037802 U CN203037802 U CN 203037802U
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Abstract
The utility model discloses a data measuring storage system achieving transformer high-frequency and ultrahigh-frequency partial discharge monitoring. The system comprises a data acquisition unit for acquiring high-frequency partial discharge signals and ultrahigh-frequency partial discharge signals; a data measuring unit for measuring data from the signal output end of the data acquisition unit so as to acquire the characteristic constant of signals reflecting faults; and a data storage unit for storing data from the signal output end of the data measuring unit and displaying fault results. The data measuring storage system integrates the main conventional partial discharge monitoring means, achieves seamless switches of various testing methods and overcomes difficulties generated when a single partial discharge monitoring method is used and characterized by testing blind areas, complex partial discharges and external interference, etc. Furthermore, the data measuring storage system has the advantages of relatively simple structure, excellent anti-interference performances, good testing repeatability, reinforced partial discharge identifying and positioning accuracy, and enhanced partial discharge identifying and positioning stability.
Description
Technical field
The utility model belongs to the power technology field, is specifically related to a kind of realization transformer high frequency ultrahigh frequency office and puts data monitored and measure storage system.
Background technology
Electrical equipments such as power transformer are subjected to factor affecting such as temperature, thunderbolt, superpotential, self-heating when long-time running, insulation can be progressively aging, shelf depreciation is the major reason of electric power transformer insulated deterioration, it mainly is because the Electric Field Distribution inequality, internal field is too high, causes electrical discharge or punch-through in the subrange in the insulating medium.This discharge only is present in the local location of insulation, can not form whole insulation connectivity immediately and puncture or flashover.As untimely shelf depreciation is effectively monitored, cause apparatus insulated puncture thereby will progressively enlarge, cause serious accident.
The generation of shelf depreciation each time all is attended by a very steep current impulse, and to its ambient radiation electromagnetic wave, the dielectric strength of transformer oil diaphragm structure is than higher, therefore the shelf depreciation in the transformer can the very high-frequency electromagnetic wave of radiation, a large amount of practical study shows the non-constant width of the frequency spectrum of shelf depreciation, approximately from hundreds of Hz to thousands of MHz.The test philosophy that detection method is put in high frequency of the prior art office generally is by the anti-electric signal in the part on the ground wire of high frequency CT coupling transformer, be input to detecting instrument, amplify and the signal processing through signal, on detecting instrument, show in real time and storage, and accept the tester and analyze.
In addition, also occur ultrahigh frequency office in the prior art and put detection, it mainly is can produce the electromagnetic wave that flows at device housings according to the shelf depreciation in the equipment, make on the ground wire or the sleeve pipe place produces the high-frequency discharge pulse current and flows through, thereby cause shell to present HF voltage and space propagation towards periphery over the ground, (300～3000MHZ) electric signal just can be realized the detection and location of shelf depreciation by ultrahigh frequency that the inner shelf depreciation of measuring transformer produces.
Though above-mentioned prior art has adopted different detection meanss, but because shelf depreciation is as a kind of very complicated electric discharge phenomena, may comprise surface-discharge or the discharge of the bubble in gliding spark discharge, solid or the liquid insulating material on conductor tip in gas or the liquid or the discharge on the corner angle, the different insulative material interface, tree dsicharge in the solid insulating material etc.Therefore, its remarkable shortcoming of bringing is: first, the discharge characteristic of various shelf depreciations is not quite similar, and the susceptibility of each method of testing is also had difference, utilizes a kind of detection method of shelf depreciation not necessarily shelf depreciation accurately can be identified and located merely; Second, even if simple integrated above-mentioned prior art is in an equipment, also will directly cause the bulky of equipment, weight is big and be not easy to carry, complex interfaces, the test wiring is in disorder, and interference free performance is poor, and the arithmetic speed of system, capacity, stability etc. require the aspect also will face test.
The utility model content
In view of this, the purpose of this utility model is to provide a kind of realization transformer high frequency ultrahigh frequency office to put data monitored and measures storage system, it can significantly improve the efficient of shelf depreciation identification and location, the electromagnetic interference (EMI) that effective filtering and test site are irrelevant, thus test duration and cost saved.
For achieving the above object, the technical solution of the utility model is achieved in that a kind of realization transformer high frequency ultrahigh frequency office puts data monitored and measure storage system, it is characterized in that, comprising: the data acquisition unit that is used for gathering high frequency partial discharge signal and high-frequency local discharging signal; Be used for the data of the signal output part of data collecting unit are measured, with the DATA REASONING unit of the eigenwert of the signal that obtains the reflection fault; And be used for the data of the signal output part of DATA REASONING unit are stored, and show the data storage cell of fail result.
Described data acquisition unit comprises: described HF current transformer connects prime amplifier, the signal of described HF current transformer collection inputs to prime amplifier, prime amplifier connects input selector, and the signal of uhf sensor collection inputs to input selector; The output terminal of described input selector connects wave filter, and the output terminal of described wave filter connects first amplifier.
The bandpass filter of described wave filter for being constituted by one group of low-pass filter and Hi-pass filter.
Described DATA REASONING unit comprises: the effective value detection module that connects the output terminal of first amplifier; The output terminal tie geophone of described first amplifier; The output terminal of described wave detector connects smoothing circuit; The output terminal of described smoothing circuit connects the envelope generator; The output terminal of described envelope generator connects loudspeaker, peak detctor, frequency component metering circuit, and the impulsive measurement trigger circuit.
Described peak detctor comprises: for first peak detctor of in the time is opened the door in pulse, working, and for second peak detctor in 25ms or 75ms work.
Described data storage cell comprises: cache module, the input end of this module connect described peak detctor, frequency component metering circuit, and the output terminal of impulsive measurement trigger circuit; The output terminal of described cache module connects display module and storage control module; Described storage control module is connected with serial line interface and storer.
The utility model has following beneficial effect with respect to prior art:
Combine the main means of existing partial discharge monitoring, realize the seamless switching of various method of testings, what overcome that single office puts that monitoring method meets with puts and difficulty such as external interference such as test blind area, complicated office, and, the electrical structure of this system is comparatively simple, the interference free performance excellence, the test good reproducibility, accuracy and the stability of shelf depreciation identification and location have all obtained good embodiment.
Description of drawings
Fig. 1 is put the structure principle chart that data monitored is measured storage system for realization transformer high frequency ultrahigh frequency of the present utility model office;
Fig. 2 is the structural representation of the specific embodiment of system shown in Figure 1;
Fig. 3 is a kind of physical circuit figure of effective value detecting device embodiment illustrated in fig. 2;
Fig. 4 is a kind of physical circuit figure of wave detector embodiment illustrated in fig. 2;
Fig. 5 is a kind of physical circuit figure of smoothing circuit embodiment illustrated in fig. 2;
Fig. 6 is a kind of physical circuit figure of frequency component metering circuit embodiment illustrated in fig. 2;
Fig. 7 is a kind of physical circuit figure of impulsive measurement trigger circuit embodiment illustrated in fig. 2;
Fig. 8 is the structural representation of data storage cell embodiment illustrated in fig. 2.
Embodiment
For the ease of the further understanding to utility model, below in conjunction with accompanying drawing embodiment of the present utility model is done detailed description further.
As shown in Figure 1, realization transformer high frequency ultrahigh frequency of the present utility model office puts data monitored and measures storage system and comprise: the data acquisition unit 110 that is used for gathering high frequency partial discharge signal and high-frequency local discharging signal; Be used for the data of the signal output part of data collecting unit 110 are measured, with the DATA REASONING unit 150 of the eigenwert of the signal that obtains the reflection fault; And be used for the data of the signal output part of DATA REASONING unit 150 are stored, and show the data storage cell 190 of fail result.
Fig. 2 is the structural representation of the specific embodiment of system shown in Figure 1, and as shown in the figure, described data acquisition unit 110 comprises: HF current transformer and uhf sensor (not shown); The signal of described HF current transformer collection inputs to prime amplifier 113, and prime amplifier 113 connects input selector 114, and the signal of uhf sensor collection inputs to input selector 114; The output terminal of described input selector 114 connects wave filter 115, and the output terminal of described wave filter 115 connects first amplifier 116.As specific embodiment, amplifier chip can adopt AD825.
As specific embodiment, described HF current transformer and uhf sensor are arranged on transformer case, bushing and/or the ground wire.The frequency band of described HF current transformer is 100KHz～10MHz, and the frequency band of described uhf sensor is 200 MHz～800MHz.
The bandpass filter of described wave filter 115 for being constituted by one group of low-pass filter and Hi-pass filter, the ultrasonic signal of generation is put because need outwards propagate by insulation course in office, consider the complicacy of cable accessory structure and the situation of acoustic attenuation, at first, the signal demand that collects prevents greatly by prime amplifier 113, as specific embodiment, the gain amplifier of prime amplifier 113 is smaller or equal to 100dB, signal after the amplification carries out signal filtering by wave filter 115, the purpose of filtering is to remove low frequency and high frequency noise, and wave filter also can be used to analytic signal.
Described DATA REASONING unit 150 comprises: the effective value detection module 151 that connects the output terminal of first amplifier 116, first amplifier 116 is used for signal is led amplification, as specific embodiment, gain amplifier is smaller or equal to 3000 dB, and the measurement of effective value is carried out from first amplifier, 116 output extraction signals and by effective value detection module 151.
The output terminal tie geophone 152 of described first amplifier 116; The output terminal of described wave detector 152 connects smoothing circuit 153; Smoothing circuit 153 is a kind of arithmetic mean generators, if level and smooth high, then the result is the arithmetic mean of input signal.The smothing filtering of signal has been clipped some highest frequencies of signal, and the spike of signal is taken down, the noise of amplifier for example, during smothing filtering time constant 1 μ s, can elimination 1MHz with upper frequency.
The output terminal of described smoothing circuit 153 connects envelope generator 154; The output terminal of described envelope generator 154 connects loudspeaker 155, peak detctor 156, frequency component metering circuit 157, and impulsive measurement trigger circuit 158.Envelope generator 154 produces the signal at track smoothing circuit 153 output signal tops, the constant decay in time of this signal, and time constant directly affects the measurement of envelope frequency component.
The signal work of peak detctor 156 usefulness envelopes in specific embodiment, can be adopted two identical peak detctors.Work in the time is opened the door in pulse for one, for detection of amplitude and the phase diagram of envelope, another is measured at 25ms or 75 ms, in order to obtain the cycle peak value of continuous coverage mode.
The physical circuit form of peak detctor 156 for example can comprise: adopting model is two audio operational amplifiers compositions of AD847, the input end in the same way of one of them amplifier connects the output terminal of envelope generator, reverse input end connects two resistance, output terminal connects diode, the reverse input end of another amplifier is connected resistance with output terminal, and input end connects diode in the same way.
In the system architecture shown in Figure 2, envelope is the basis that signal is further analyzed, frequency content and the peak value of signal are obtained by envelope, arrive the signal of loudspeaker 155 also from envelope generator 154, at last, impulsive measurement trigger circuit 158 also adopt the output signal of envelope generator 154.
Fig. 3 is a kind of physical circuit figure of effective value detecting device embodiment illustrated in fig. 2, as shown in the figure, the p1 pin of IC1 connects an end of capacitor C 2 and an end of resistance R 11, COM pin and the UTO pin of the other end of C2 and IC1 join, the other end of R11 connects the d1 pin of U2, one end of RMSut pin and capacitor C 3, the other end of C3 is connected with the Cav pin of IC1, the p0 pin of IC1 connects an end of resistance R 15, the other end of R15 connects an end of capacitor C 5, the other end of C5 connects an end of resistance R 13, and the other end of R13 connects capacitor C 7, and the VIN pin of the other end of C7 and IC1 joins, signal is output as the effective value direct current signal by this effective value detecting device.
As specific embodiment, IC1 can adopt AD637, and this chip provides the crest factor compensation scheme, allows the crest factor measurement signal to be up to 10, and extra error is less than 1%.Bandwidth allows to measure 200 mV root mean square, frequency is up to the input signal of 600 kHz and the input signal that 1 V root mean square is above, frequency is up to 8 MHz.
Fig. 4 is a kind of physical circuit figure of wave detector embodiment illustrated in fig. 2, as shown in the figure, the reverse input end of amplifier U1 connects an end of resistance R 21, the other end of R21 connects the positive pole of diode D11 and an end of resistance R 23, the negative pole of D11 connects the output terminal of U1 and the positive pole of diode D12, the input end in the same way of U2 connects the negative pole of diode D12 and an end of resistance R 24, the other end ground connection of R24, the reverse input end of U2 connects the other end of resistance R 23 and an end of resistance R 25, and the other end of R25 is connected with the output terminal of U2.In the specific embodiment, diode D11 and D12 can adopt IN4148.
Fig. 5 is a kind of physical circuit figure of smoothing circuit embodiment illustrated in fig. 2, as shown in the figure, an end of resistance R 31 is signal input part, and the other end of R31 connects an end of capacitor C 22, the other end ground connection of C22, resistance R 31 and capacitor C 22 are formed a resistance capacity filter signal are carried out smoothing processing.
Fig. 6 is a kind of physical circuit figure of frequency component metering circuit embodiment illustrated in fig. 2, as shown in the figure, the simple connection civil power of transformer, the end of secondary connection resistance R 51 and R52, the IN-pin of IC2 connects the other end of resistance R 51 and R52, the OUT pin connects an end of resistance R 53 and an end of capacitor C 34, and the other end of capacitor C 34 connects an end of resistance R 55, and the other end of R55 is connected not gate with the other end of capacitor C 34.As specific embodiment, IC2 can adopt LM311N.
Fig. 7 is a kind of physical circuit figure of impulsive measurement trigger circuit embodiment illustrated in fig. 2, and as shown in the figure, the IN+ of the input end in the same way pin of IC3 connects resistance R 71 and R72, and reverse input end IN-pin connects the output terminal of envelope generator 154.As specific embodiment, IC3 can adopt LM311N.
Fig. 8 is the concrete structure synoptic diagram of data storage cell embodiment illustrated in fig. 2, as shown in the figure, described data storage cell 190 comprises: cache module 191, the input end of this module connects described peak detctor 156, frequency component metering circuit 157, and the output terminal of impulsive measurement trigger circuit 158; The output terminal of described cache module 191 connects display module 193 and storage control module 194; Described storage control module 194 is connected with serial line interface 197 and storer 198.
Experiment effect is for example: the utility model is applied in the middle of the experiment of tag simulated defect, and its measurement sensitivity can satisfy field requirement, and can be in time, discovery cable end inherent vice early.The integrated combination of partial discharge monitoring means makes that the partial discharges fault location is simpler, quick, efficient.
The above is preferred embodiment of the present invention only, is not for limiting protection scope of the present invention.
Claims (10)
1. data monitored measurement storage system is put in a realization transformer high frequency ultrahigh frequency office, it is characterized in that, comprising:
Be used for gathering the data acquisition unit of high frequency partial discharge signal and high-frequency local discharging signal;
Be used for the data of the signal output part of data collecting unit are measured, with the DATA REASONING unit of the eigenwert of the signal that obtains the reflection fault; And
Be used for the data of the signal output part of DATA REASONING unit are stored, and show the data storage cell of fail result.
2. system according to claim 1 is characterized in that, described data acquisition unit comprises: HF current transformer and uhf sensor;
The signal of described HF current transformer collection inputs to prime amplifier, and prime amplifier connects input selector, and the signal of uhf sensor collection inputs to input selector;
The output terminal of described input selector connects wave filter, and the output terminal of described wave filter connects first amplifier.
3. system according to claim 2 is characterized in that, the bandpass filter of described wave filter for being made of one group of low-pass filter and Hi-pass filter.
4. according to claim 2 or 3 described systems, it is characterized in that the gain of described prime amplifier is within the 100dB.
5. according to claim 2 or 3 described systems, it is characterized in that described first Amplifier Gain is within the 3000dB.
6. according to claim 1,2,3 described systems, it is characterized in that described DATA REASONING unit comprises:
The effective value detection module that connects the output terminal of first amplifier;
The output terminal tie geophone of described first amplifier;
The output terminal of described wave detector connects smoothing circuit;
The output terminal of described smoothing circuit connects the envelope generator;
The output terminal of described envelope generator connects loudspeaker, peak detctor, frequency component metering circuit, and the impulsive measurement trigger circuit.
7. system according to claim 6 is characterized in that, described peak detctor comprises: for first peak detctor of in the time is opened the door in pulse, working, and for second peak detctor in 25ms or 75ms work.
8. system according to claim 6 is characterized in that, described data storage cell comprises:
Cache module, the input end of this module connect described peak detctor, frequency component metering circuit, and the output terminal of impulsive measurement trigger circuit;
The output terminal of described cache module connects display module and storage control module;
Described storage control module is connected with serial line interface and storer.
9. system according to claim 2, it is characterized in that: described HF current transformer and uhf sensor are arranged on transformer case, bushing and/or the ground wire.
10. system according to claim 9, it is characterized in that: the frequency band of described HF current transformer is 100KHz～10MHz, the frequency band of described uhf sensor is 200 MHz～800MHz.
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| CN 201220683531 CN203037802U (en) | 2012-12-12 | 2012-12-12 | Data measuring storage system achieving transformer high-frequency and ultrahigh-frequency partial discharge monitoring |
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| CN 201220683531 CN203037802U (en) | 2012-12-12 | 2012-12-12 | Data measuring storage system achieving transformer high-frequency and ultrahigh-frequency partial discharge monitoring |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102981110A (en) * | 2012-12-12 | 2013-03-20 | 山西省电力公司电力科学研究院 | Data measurement and storage system and method for achieving high frequency and ultra-high frequency partial discharge monitoring of transformer |
| CN105334435A (en) * | 2015-10-23 | 2016-02-17 | 国网山东海阳市供电公司 | Adaptive partial discharge ultrasonic monitoring method based on any array |
| CN108919070A (en) * | 2018-06-07 | 2018-11-30 | 广西电网有限责任公司电力科学研究院 | A kind of partial discharge of switchgear detection system of Multi-source Information Fusion |
| CN108919069A (en) * | 2018-06-07 | 2018-11-30 | 广西电网有限责任公司电力科学研究院 | A kind of method for detection of partial discharge of switch cabinet of Multi-source Information Fusion |
| CN112904139A (en) * | 2020-10-10 | 2021-06-04 | 国网山东省电力公司枣庄供电公司 | High-voltage switch cabinet partial discharge positioning method and system considering temperature field change |
-
2012
- 2012-12-12 CN CN 201220683531 patent/CN203037802U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102981110A (en) * | 2012-12-12 | 2013-03-20 | 山西省电力公司电力科学研究院 | Data measurement and storage system and method for achieving high frequency and ultra-high frequency partial discharge monitoring of transformer |
| CN105334435A (en) * | 2015-10-23 | 2016-02-17 | 国网山东海阳市供电公司 | Adaptive partial discharge ultrasonic monitoring method based on any array |
| CN108919070A (en) * | 2018-06-07 | 2018-11-30 | 广西电网有限责任公司电力科学研究院 | A kind of partial discharge of switchgear detection system of Multi-source Information Fusion |
| CN108919069A (en) * | 2018-06-07 | 2018-11-30 | 广西电网有限责任公司电力科学研究院 | A kind of method for detection of partial discharge of switch cabinet of Multi-source Information Fusion |
| CN112904139A (en) * | 2020-10-10 | 2021-06-04 | 国网山东省电力公司枣庄供电公司 | High-voltage switch cabinet partial discharge positioning method and system considering temperature field change |
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Owner name: STATE GRID CORPORATION OF CHINA Free format text: FORMER OWNER: ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANXI POWER SUPPLY COMPANY Effective date: 20140128 Owner name: ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SH Effective date: 20140128 |
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Owner name: ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SH Free format text: FORMER NAME: ELECTRIC POWER SCIENCE INST., SHANXI PROV. POWER CO. |
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Free format text: CORRECT: ADDRESS; FROM: 030012 TAIYUAN, SHAANXI PROVINCE TO: 100031 XICHENG, BEIJING |
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Address after: 030012 No. 6, Qingnian Road, Shanxi, Taiyuan Patentee after: STATE GRID ELECTRIC POWER Research Institute OF SEPC Address before: 030012 No. 6, Qingnian Road, Shanxi, Taiyuan Patentee before: SHANXI ELECTRIC POWER Research Institute |
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Effective date of registration: 20140128 Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Patentee after: State Grid Corporation of China Patentee after: STATE GRID ELECTRIC POWER Research Institute OF SEPC Address before: 030012 No. 6, Qingnian Road, Shanxi, Taiyuan Patentee before: STATE GRID ELECTRIC POWER Research Institute OF SEPC |
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Granted publication date: 20130703 Termination date: 20131212 |