CN105425126A - Separation method for multiple partial discharge sources and conditioning device for three frequency centers - Google Patents
Separation method for multiple partial discharge sources and conditioning device for three frequency centers Download PDFInfo
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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
Abstract
The invention discloses a separation method for multiple partial discharge sources and a conditioning device for three frequency centers. The separation method comprises the following steps: acquiring electromagnetic wave pulse signals; performing A/D synchronous conversion, detecting modulation signals through band-pass filters and detectors of low, medium and high preset bands separately, extracting peak parameters of the modulation signals and displaying the peak parameters on a three-dimensional coordinate axis. The conditioning device for three frequency centers comprises a center conditioning unit and an ultra high frequency signal sensor, wherein the center conditioning unit comprises a multi-channel A/D synchronous converter, a low band-pass filter, a medium band-pass filter, a high band-pass filter and detectors. The method can realize separation of multiple discharge sources, can be used as detection means for multiple partial discharge sources in field, and has the advantages of good detection sensitivity, high separation efficiency and convenience in field detection.
Description
Technical field
The present invention relates to power engineering partial-discharge ultrahigh-frequency and detect Anti-Jamming Technique field, be specifically related to a kind of many shelf depreciations source separation method and three center frequency conditioning devices thereof, be applicable to exist the measure that many discharge source of applying in Partial Discharge Detection under transformer station's complex jamming environment of many places discharge source are separated, and carry out shelf depreciation live detection for main equipments such as 35kV and above substation transformer, GIS, switch cubicle, cables.
Background technology
SF
6gas-insulated combined switch (GasInsulatedSwitchgear, be called for short GIS) be the high-voltage electrical apparatus power distribution equipment of a kind of advanced person occurred at the initial stage seventies, little with its floor area, not affected by environment, be easy to the advantages such as maintenance, be widely applied in China each department.But, the complex structure of GIS own, easily defect is left in manufacture and assembling process, as dirty in superstructure loosening, conductor burr, insulator surface, inner foreign matter etc., segmental defect is difficult to find in delivery test and field acceptance test, and after putting into operation, slowly development guiding discharge punctures accidents caused.In recent years, GIS partial discharge detection technique superfrequency method (UHF), due to advantages such as its anti-interference are good, highly sensitive, can locate, is widely used in the detection of the high-voltage electrical apparatus such as GIS, transformer apparatus local discharge.But utilizing UHF detection method to carry out in the practice of local discharge of electrical equipment detection, high-frequency interferencing signals a large amount of in surrounding environment, still can produce serious interference to Detection and diagnosis effect.
Instantly superfrequency partial discharge detecting system mainly carries out pattern-recognition by partial discharge pulse sequence map PRPS (PhaseResolvedPulseSequence) and local discharge phase collection of illustrative plates PRPD (PhaseResolvedPartialDischarge).But this pattern-recognition mode can only identify the type of single discharge source accurately, and in testing process, except high voltage electric equipment local discharge signal, also there is a large amount of high-frequency interferencing signals in surrounding environment.Under these circumstances, the effect of PRPD and PRPS mass spectrum database was lost efficacy.Consider that noise interferences and high voltage electric equipment Partial discharge signal there are differences in time domain and frequency domain, therefore take the method that multi-source is separated.At present, for the process of multi-source separation problem, there are following three kinds of methods: the synchronous Method of Noise of (1) noise transducer; (2) differential balance method; (3) wavelet analysis method.The synchronous Method of Noise of method 1(noise transducer) although to suppressing the interference of external noise to have very good effect, in the face of different external environment conditions, be difficult to determine different threshold values.It is for special measure in particular cases, is difficult to promote the use of in the ordinary course of things.Method 2(differential balance method) line again need be carried out to two of a same equipment port, be difficult to application in on-line checkingi process.Method 3(wavelet analysis method) first should obtain the primitive character of signal, but due to the frequency range of superfrequency original signal higher, need very high sampling rate just can detect, be also difficult to realize in engineering.In sum, at present for the problem that multi-source in superfrequency Partial Discharge Detection is separated, scene there is no ripe method.
Summary of the invention
The technical problem to be solved in the present invention: for the problems referred to above of prior art, a kind of separation that effectively can realize multiple discharge source is provided, there is detection means when putting source for many innings in the scene of can be used as, detection sensitivity is good, separation efficiency is high, Site Detection many shelf depreciations source separation method and three center frequency conditioning devices thereof easily.
In order to solve the problems of the technologies described above, the technical solution used in the present invention is:
The invention provides a kind of many shelf depreciations source separation method, step comprises:
1) the electromagnetic impulse signal of each Partial Discharge Sources superfrequency shelf depreciation is gathered;
2) described electromagnetic impulse signal is carried out after A/D synchronously changes, the pulse signal after conversion being preset the bandpass filter of frequency range respectively by basic, normal, high three kinds, obtaining the filtering signal of three kinds of different frequency ranges;
3) filtering signal of described three kinds of different frequency ranges is carried out detection process respectively through wave detector and detect modulation signal;
4) extract the peak-to-peak value parameter of described modulation signal and be presented on 3-D walls and floor, the modulation signal making amplitude different with frequency drops on different coordinate positions on 3-D walls and floor respectively to distinguish the amplitude Partial Discharge Sources different with frequency.
Preferably, when gathering the electromagnetic impulse signal of each Partial Discharge Sources superfrequency shelf depreciation in described step 1), adopt the bandwidth of described ultrahigh-frequency signal sensor to be 300M ~ 2000MHz; Described step 2) in by conversion after pulse signal preset the bandpass filter of frequency range respectively by basic, normal, high three kinds time, the frequency band range of low-frequency range bandpass filter is 300M ~ 800MHz, the frequency band range of Mid Frequency bandpass filter is 800M ~ 1300MHz, and the frequency band range of high band bandpass filter is 1300M ~ 2000MHz.
Preferably, in described step 3), the filtering signal of described three kinds of different frequency ranges is carried out detection process through wave detector and detect modulation signal, the frequency of institute's employing wave detector is 0.01G ~ 3GHz, detection sensitivity is 1.5mV/ μ W, standing-wave ratio (SWR) is less than 1.3.
Preferably, described step 2) in described electromagnetic impulse signal carried out A/D when synchronously changing, specifically refer to that described electromagnetic impulse signal is carried out A/D by hyperchannel A/D synchronous converter synchronously to be changed, and the resolution of described hyperchannel A/D synchronous converter is 24.
Preferably, described step 2) in described electromagnetic impulse signal carried out before A/D synchronously changes, specifically refer to and the electromagnetic impulse signal gathering each Partial Discharge Sources superfrequency shelf depreciation is transferred to described hyperchannel A/D synchronous converter by radio frequency coaxial-cable.
The present invention also provides a kind of many Partial Discharge Sources to be separated with three center frequency conditioning devices, comprise center conditioning unit and the ultrahigh-frequency signal sensor for the electromagnetic impulse signal that gathers each Partial Discharge Sources superfrequency shelf depreciation, described center conditioning unit comprises hyperchannel A/D synchronous converter, low-frequency range bandpass filter, Mid Frequency bandpass filter, high band bandpass filter and wave detector, described ultrahigh-frequency signal sensor is connected with the input end of hyperchannel A/D synchronous converter, the output terminal of described hyperchannel A/D synchronous converter respectively with low-frequency range bandpass filter, Mid Frequency bandpass filter, high band bandpass filter is connected, described low-frequency range bandpass filter, Mid Frequency bandpass filter, the output terminal of high band bandpass filter is connected with wave detector jointly.
Preferably, the bandwidth of described ultrahigh-frequency signal sensor is 300M ~ 2000MHz, described low-frequency range bandpass filter, frequency band range is 300M ~ 800MHz, the frequency band range of described Mid Frequency bandpass filter is 800M ~ 1300MHz, and the frequency band range of described high band bandpass filter is 1300M ~ 2000MHz.
Preferably, the frequency of described wave detector is 0.01G ~ 3GHz, detection sensitivity is 1.5mV/ μ W, standing-wave ratio (SWR) is less than 1.3.
Preferably, the resolution of described hyperchannel A/D synchronous converter is 24.
Preferably, the output terminal of described ultrahigh-frequency signal sensor is connected with hyperchannel A/D synchronous converter by radio frequency coaxial-cable.
The present invention's many shelf depreciations source separation method has following advantage: after the present invention gathers the electromagnetic impulse signal of each Partial Discharge Sources superfrequency shelf depreciation, electromagnetic impulse signal is carried out after A/D synchronously changes, by the pulse signal after conversion respectively by low, in, high three kinds of bandpass filter presetting frequency range, obtain the filtering signal of three kinds of different frequency ranges, the filtering signal of three kinds of different frequency ranges is carried out detection process respectively through wave detector and detects modulation signal, extract the peak-to-peak value parameter of modulation signal and be presented on 3-D walls and floor, the modulation signal making amplitude different with frequency drops on different coordinate positions on 3-D walls and floor respectively to distinguish the amplitude Partial Discharge Sources different with frequency, effectively can carry out the separation of multiple discharge source, for important place mat work is carried out in the identification of the present invention's many shelf depreciations source separation method follow-up shelf depreciation type, there is detection means when putting source for many innings in the scene of can be used as, there is detection sensitivity good, separation efficiency is high, Site Detection is advantage easily.
The many Partial Discharge Sources of the present invention are separated has following advantage with three center frequency conditioning devices: the device realizing modulation signal retrieval when the many Partial Discharge Sources separation of the present invention three center frequency conditioning devices are the application of the present invention's many shelf depreciations source separation method, effectively can carry out the separation of multiple discharge source, for important place mat work is carried out in the identification of the present invention's many shelf depreciations source separation method follow-up shelf depreciation type, there is detection means when putting source for many innings in the scene of can be used as, has that detection sensitivity is good, separation efficiency is high, Site Detection advantage easily.
Accompanying drawing explanation
Fig. 1 is the basic procedure schematic diagram of embodiment of the present invention method.
Fig. 2 is the system architecture schematic diagram of the application embodiment of the present invention three center frequency conditioning device.
Fig. 3 is the framed structure schematic diagram of the embodiment of the present invention three center frequency conditioning device.
Fig. 4 is many Partial Discharge Sources separation principle schematic diagram of the embodiment of the present invention.
Marginal data: 1, center conditioning unit; 11, hyperchannel A/D synchronous converter; 12, low-frequency range bandpass filter; 13, Mid Frequency bandpass filter; 14, high band bandpass filter; 15, wave detector; 2, ultrahigh-frequency signal sensor; 3, Signal aspects and analytic unit.
Embodiment
As shown in Figure 1, the step of many shelf depreciations source separation method of the present embodiment comprises:
1) the electromagnetic impulse signal of each Partial Discharge Sources superfrequency shelf depreciation is gathered;
2) electromagnetic impulse signal is carried out after A/D synchronously changes, the pulse signal after conversion being preset the bandpass filter of frequency range respectively by basic, normal, high three kinds, obtaining the filtering signal of three kinds of different frequency ranges;
3) filtering signal of three kinds of different frequency ranges is carried out detection process through wave detector and detect modulation signal;
4) extract the peak-to-peak value parameter of modulation signal and be presented on 3-D walls and floor, the modulation signal making amplitude different with frequency drops on different coordinate positions on 3-D walls and floor respectively to distinguish the amplitude Partial Discharge Sources different with frequency.
In the present embodiment, when gathering the electromagnetic impulse signal of each Partial Discharge Sources superfrequency shelf depreciation in step 1), adopt the bandwidth of ultrahigh-frequency signal sensor to be 300M ~ 2000MHz; Step 2) in by conversion after pulse signal preset the bandpass filter of frequency range respectively by basic, normal, high three kinds time, the frequency band range of low-frequency range bandpass filter is that 300M ~ 800MHz(is with reference to GB/T7354 standard, frequency for passband peak decline 6dB), the frequency band range of Mid Frequency bandpass filter is 800M ~ 1300MHz, and the frequency band range of high band bandpass filter is 1300M ~ 2000MHz.
In the present embodiment, in step 3), the filtering signal of three kinds of different frequency ranges is carried out detection process through wave detector and detect modulation signal, the frequency of institute's employing wave detector is 0.01G ~ 3GHz, detection sensitivity is 1.5mV/ μ W, standing-wave ratio (SWR) is less than 1.3, can detect the signal after separation without distortion.
In the present embodiment, step 2) in electromagnetic impulse signal carried out A/D when synchronously changing, specifically refer to that electromagnetic impulse signal is carried out A/D by hyperchannel A/D synchronous converter synchronously to be changed, and the resolution of hyperchannel A/D synchronous converter is 24.
In the present embodiment, step 2) in electromagnetic impulse signal carried out before A/D synchronously changes, specifically refer to and the electromagnetic impulse signal gathering each Partial Discharge Sources superfrequency shelf depreciation is transferred to hyperchannel A/D synchronous converter by radio frequency coaxial-cable.
As shown in Figures 2 and 3, the many Partial Discharge Sources of the present embodiment are separated and comprise center conditioning unit 1 and the ultrahigh-frequency signal sensor 2 for the electromagnetic impulse signal that gathers each Partial Discharge Sources superfrequency shelf depreciation with three center frequency conditioning devices, center conditioning unit 1 comprises hyperchannel A/D synchronous converter 11, low-frequency range bandpass filter 12, Mid Frequency bandpass filter 13, high band bandpass filter 14 and wave detector 15, ultrahigh-frequency signal sensor 2 is connected with the input end of hyperchannel A/D synchronous converter 11, the output terminal of hyperchannel A/D synchronous converter 11 respectively with low-frequency range bandpass filter 12, Mid Frequency bandpass filter 13, high band bandpass filter 14 is connected, low-frequency range bandpass filter 12, Mid Frequency bandpass filter 13, the output terminal of high band bandpass filter 14 is connected with wave detector 15 jointly.In the present embodiment, the bandwidth of ultrahigh-frequency signal sensor 2 is 300M ~ 2000MHz, the main frequency range that source ultrahigh-frequency signal is put in on-the-spot office can be contained, the frequency band range of low-frequency range bandpass filter 12 is that 300M ~ 800MHz(is with reference to GB/T7354 standard, frequency for passband peak decline 6dB), the frequency band range of Mid Frequency bandpass filter 13 is 800M ~ 1300MHz, and the frequency band range of high band bandpass filter 14 is 1300M ~ 2000MHz.In the present embodiment, the frequency of wave detector 15 is 0.01G ~ 3GHz, detection sensitivity is 1.5mV/ μ W, standing-wave ratio (SWR) is less than 1.3, can detect the signal after separation without distortion.In the present embodiment, the resolution of hyperchannel A/D synchronous converter 11 is 24.In the present embodiment, the output terminal of ultrahigh-frequency signal sensor 2 is connected with hyperchannel A/D synchronous converter 11 by radio frequency coaxial-cable.
The principle that in the present embodiment, many Partial Discharge Sources are separated comprises: 1. local discharge signal is broadband signal, and adopt ultrahigh-frequency signal sensor to detect, main frequency range can cover 300M ~ 2000MHz scope; 2. the signal spectrum characteristic of different discharge source generation is different, and the signal amplitude namely within the scope of different frequency range is different.Therefore, ultrahigh-frequency signal sensor 2 receives multi-source office and puts pulse signal, is processed by hyperchannel A/D synchronous converter 11, presets the frequency of basic, normal, high three kinds of frequency ranges.The original signal exported from hyperchannel A/D synchronous converter 11 obtains the signal of three kinds of different frequency ranges by segmentation after low-frequency range bandpass filter 12, Mid Frequency bandpass filter 13, high band bandpass filter 14, then the signal of three kinds of different frequency ranges processes through wave detector 25, distortionlessly from Extent Modulate Wave will detect modulation signal, thus obtain the peak value of three different frequency range signals.As shown in Figure 4, for discharge source #1 and discharge source #2, the course of work of carrying out the separation of many Partial Discharge Sources with three center frequency conditioning devices to the separation of employing the present embodiment many Partial Discharge Sources is as follows: (1) ultrahigh-frequency signal sensor 2 gathers the electromagnetic impulse signal of each Partial Discharge Sources superfrequency shelf depreciation, comprises the electromagnetic impulse signal F1 of discharge source #1, the electromagnetic impulse signal F2 of discharge source #2, (2) electromagnetic impulse signal carries out after A/D synchronously changes by hyperchannel A/D synchronous converter 11, by the pulse signal after conversion respectively by low-frequency range bandpass filter 12, Mid Frequency bandpass filter 13, high band bandpass filter 14, obtain the filtering signal of three kinds of different frequency ranges, the filtering signal of three kinds of different frequency ranges of discharge source #1 is designated as F11, F12, F13 respectively, the filtering signal of three kinds of different frequency ranges of discharge source #2 is designated as F21, F22, F23 respectively, wherein electromagnetic impulse signal F1=F11+F12+F13, electromagnetic impulse signal F2=F21+F22+F23, (3) filtering signal of three kinds of different frequency ranges is carried out detection process respectively through wave detector and detect modulation signal, such as electromagnetic impulse signal F1 obtains modulation signal F11+F12+F13, and electromagnetic impulse signal F2 obtains modulation signal F21+F22+F23, (4) be separated for example realizes many Partial Discharge Sources, also need to show and analytic unit 3 in the rear end connection signal of center conditioning unit 1, Signal aspects and analytic unit 3 extract the peak-to-peak value parameter of modulation signal and are presented on 3-D walls and floor, the modulation signal making amplitude different with frequency drops on different coordinate positions on 3-D walls and floor respectively to distinguish the amplitude Partial Discharge Sources different with frequency, such as electromagnetic impulse signal F1 obtains modulation signal F11+F12+F13, electromagnetic impulse signal F2 obtains modulation signal F21+F22+F23, the modulation signal (F11 after process, F12, F13 and F21, F22, F23) entering signal display and analytic unit 3, then extract the peak value of these signals, form three-dimensional coordinate, the three-dimensional coordinate of discharge source #1 is (L11, L12, L13), the three-dimensional coordinate of discharge source #2 is (L21, L22, L23), wherein L11, L12, L13 is respective signal F11 respectively, F12, the peak value of F13, L21, L22, L23 is respective signal F21 respectively, F22, the peak value of F23.Put according to office the feature that source signal has, the three-dimensional coordinate that different office source of putting obtains through the present embodiment is not identical, and 3-D walls and floor will be presented at different coordinate position place, thus distinguishes the signal from different discharge source.
The above is only the preferred embodiment of the present invention, protection scope of the present invention be not only confined to above-described embodiment, and all technical schemes belonged under thinking of the present invention all belong to protection scope of the present invention.It should be pointed out that for those skilled in the art, some improvements and modifications without departing from the principles of the present invention, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (10)
1. the source separation method of shelf depreciation more than, is characterized in that step comprises:
1) the electromagnetic impulse signal of each Partial Discharge Sources superfrequency shelf depreciation is gathered;
2) described electromagnetic impulse signal is carried out after A/D synchronously changes, the pulse signal after conversion being preset the bandpass filter of frequency range respectively by basic, normal, high three kinds, obtaining the filtering signal of three kinds of different frequency ranges;
3) respectively the filtering signal of described three kinds of different frequency ranges is carried out detection process through wave detector and detect modulation signal;
4) extract the peak-to-peak value parameter of described modulation signal and be presented on 3-D walls and floor, the modulation signal making amplitude different with frequency drops on different coordinate positions on 3-D walls and floor respectively to distinguish the amplitude Partial Discharge Sources different with frequency.
2. many shelf depreciations source separation method according to claim 1, it is characterized in that, when gathering the electromagnetic impulse signal of each Partial Discharge Sources superfrequency shelf depreciation in described step 1), adopt the bandwidth of described ultrahigh-frequency signal sensor to be 300M ~ 2000MHz; Described step 2) in by conversion after pulse signal preset the bandpass filter of frequency range respectively by basic, normal, high three kinds time, the frequency band range of low-frequency range bandpass filter is 300M ~ 800MHz, the frequency band range of Mid Frequency bandpass filter is 800M ~ 1300MHz, and the frequency band range of high band bandpass filter is 1300M ~ 2000MHz.
3. many shelf depreciations source separation method according to claim 2, it is characterized in that, in described step 3), the filtering signal of described three kinds of different frequency ranges is carried out detection process through wave detector and detect modulation signal, the frequency of institute's employing wave detector is 0.01G ~ 3GHz, detection sensitivity is 1.5mV/ μ W, standing-wave ratio (SWR) is less than 1.3.
4. many shelf depreciations source separation method according to claim 3, it is characterized in that, it is characterized in that: described step 2) in described electromagnetic impulse signal carried out A/D when synchronously changing, specifically refer to that described electromagnetic impulse signal is carried out A/D by hyperchannel A/D synchronous converter synchronously to be changed, and the resolution of described hyperchannel A/D synchronous converter is 24.
5. many shelf depreciations source separation method according to claim 4, it is characterized in that, it is characterized in that: described step 2) in described electromagnetic impulse signal carried out before A/D synchronously changes, specifically refer to and the electromagnetic impulse signal gathering each Partial Discharge Sources superfrequency shelf depreciation is transferred to described hyperchannel A/D synchronous converter by radio frequency coaxial-cable.
6. Partial Discharge Sources more than a kind is separated with three center frequency conditioning devices, it is characterized in that: comprise center conditioning unit (1) and the ultrahigh-frequency signal sensor (2) for the electromagnetic impulse signal that gathers each Partial Discharge Sources superfrequency shelf depreciation, described center conditioning unit (1) comprises hyperchannel A/D synchronous converter (11), low-frequency range bandpass filter (12), Mid Frequency bandpass filter (13), high band bandpass filter (14) and wave detector (15), described ultrahigh-frequency signal sensor (2) is connected with the input end of hyperchannel A/D synchronous converter (11), the output terminal of described hyperchannel A/D synchronous converter (11) respectively with low-frequency range bandpass filter (12), Mid Frequency bandpass filter (13), high band bandpass filter (14) is connected, described low-frequency range bandpass filter (12), Mid Frequency bandpass filter (13), the output terminal of high band bandpass filter (14) is connected with wave detector (15) jointly.
7. many Partial Discharge Sources according to claim 6 are separated with three center frequency conditioning devices, it is characterized in that: the bandwidth of described ultrahigh-frequency signal sensor (2) is 300M ~ 2000MHz, the frequency band range of described low-frequency range bandpass filter (12) is 300M ~ 800MHz, the frequency band range of described Mid Frequency bandpass filter (13) is 800M ~ 1300MHz, and the frequency band range of described high band bandpass filter (14) is 1300M ~ 2000MHz.
8. many Partial Discharge Sources according to claim 7 are separated with three center frequency conditioning devices, it is characterized in that: the frequency of described wave detector (15) is 0.01G ~ 3GHz, detection sensitivity is 1.5mV/ μ W, standing-wave ratio (SWR) is less than 1.3.
9. many Partial Discharge Sources according to claim 8 are separated with three center frequency conditioning devices, it is characterized in that: the resolution of described hyperchannel A/D synchronous converter (11) is 24.
10. many Partial Discharge Sources according to claim 9 are separated with three center frequency conditioning devices, it is characterized in that: the output terminal of described ultrahigh-frequency signal sensor (2) is connected with hyperchannel A/D synchronous converter (11) by radio frequency coaxial-cable.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109670536A (en) * | 2018-11-30 | 2019-04-23 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of local discharge signal clustering method in the case of multi-source electric discharge and interference superposition |
| CN111308290A (en) * | 2020-03-06 | 2020-06-19 | 西安交通大学 | Partial discharge detection device based on silicon photomultiplier |
| CN111579938A (en) * | 2020-04-14 | 2020-08-25 | 杭州柯林电气股份有限公司 | Multi-sensor-based multi-source partial discharge signal separation method and monitoring system |
-
2015
- 2015-12-16 CN CN201510939588.1A patent/CN105425126A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109670536A (en) * | 2018-11-30 | 2019-04-23 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | A kind of local discharge signal clustering method in the case of multi-source electric discharge and interference superposition |
| CN109670536B (en) * | 2018-11-30 | 2023-05-30 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Partial discharge signal clustering method under multi-source discharge and interference superposition condition |
| CN111308290A (en) * | 2020-03-06 | 2020-06-19 | 西安交通大学 | Partial discharge detection device based on silicon photomultiplier |
| CN111579938A (en) * | 2020-04-14 | 2020-08-25 | 杭州柯林电气股份有限公司 | Multi-sensor-based multi-source partial discharge signal separation method and monitoring system |
| CN111579938B (en) * | 2020-04-14 | 2024-03-22 | 杭州柯林电气股份有限公司 | Multisensor-based multisource partial discharge signal separation method and monitoring system |
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Application publication date: 20160323 |
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