CN105467346A - Partial discharge detection device evaluation method - Google Patents
Partial discharge detection device evaluation method Download PDFInfo
- Publication number
- CN105467346A CN105467346A CN201610055963.0A CN201610055963A CN105467346A CN 105467346 A CN105467346 A CN 105467346A CN 201610055963 A CN201610055963 A CN 201610055963A CN 105467346 A CN105467346 A CN 105467346A
- Authority
- CN
- China
- Prior art keywords
- partial discharge
- discharge detection
- detection device
- pulse signal
- evaluation method
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 81
- 238000011156 evaluation Methods 0.000 title claims abstract description 49
- 230000003068 static effect Effects 0.000 claims abstract description 35
- 238000000034 method Methods 0.000 claims abstract description 17
- 230000005540 biological transmission Effects 0.000 claims abstract description 9
- 238000010183 spectrum analysis Methods 0.000 claims abstract description 9
- 238000005316 response function Methods 0.000 claims description 5
- 238000005259 measurement Methods 0.000 abstract 1
- 208000028659 discharge Diseases 0.000 description 78
- 238000012806 monitoring device Methods 0.000 description 8
- 230000004044 response Effects 0.000 description 7
- 230000035945 sensitivity Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 230000009897 systematic effect Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000003745 diagnosis Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Relating To Insulation (AREA)
Abstract
The invention discloses a partial discharge detection device evaluation method comprising a static state index evaluation method and a dynamic state index evaluation method. The static state index evaluation method is characterized in that the static state calibrating of the partial discharge detection device can be carried out according to the related specification of the partial discharge, and the comparison between the index result and the index of the related specification can be carried out to acquire the static state index evaluation. The dynamic state index evaluation method is characterized in that the ps level pulse signal can be input in the partial discharge detection device, and the dynamic state index evaluation of the partial discharge detection device can be analyzed by comparing the input pulse signal and the output pulse signal according to the spectrum analysis method; and according to the non-distortion transmission condition, whether the dynamic state index evaluation accords with the dynamic state index can be determined. The partial discharge detection device evaluation method is advantageous in that the performance of the partial discharge detection device can be evaluated systematically and accurately, and the realization is simple, and the calibrating cost is low; the requirement of the national standard on the evaluation of the partial discharge detection device can be satisfied, and the standard reference signal can be provided for the calibrating and the correcting of the related device, and the measurement standard and the evaluation system can be provided for the purchase of the partial discharge detection device.
Description
Technical Field
The invention relates to the technical field of partial discharge diagnosis of power equipment, in particular to an evaluation method of a partial discharge detection device.
Background
The partial discharge detection is used as an important means for insulation diagnosis of the power equipment, not only can sensitively reflect the early failure of the equipment, but also provides a basis for effectively taking preventive measures and can reflect the insulation condition of the power high-voltage equipment. At present, local discharge detection devices at home and abroad have a plurality of products, but the performance and the accuracy of the local discharge detection devices cannot meet the requirements of local discharge tests. Therefore, it is an essential task to evaluate and calibrate the performance of the partial discharge detection device.
In the prior art, there are many evaluation methods for partial discharge detection devices, including a pulse current method, ultrasonic waves, an ultrahigh frequency method, etc., but each method cannot systematically and comprehensively evaluate and calibrate various performances of the partial discharge detection device. Meanwhile, although the related national power industry makes relevant specifications for the calibration of the partial discharge detection device, the relevant specifications cannot completely and accurately calibrate the indexes of the partial discharge detection device.
Therefore, a systematic and accurate method for evaluating the performance of the partial discharge detection device is in urgent need.
Disclosure of Invention
The embodiment of the invention provides an evaluation method of a partial discharge detection device, which aims to solve the problems that the performance of the partial discharge detection device is not standard and uncertain in the prior art.
In order to solve the technical problem, the embodiment of the invention discloses the following technical scheme:
an evaluation method of a partial discharge detection device comprises a static index evaluation method and a dynamic index evaluation method;
the static index evaluation method comprises the following steps:
step S110: generating a standard pulse signal;
step S120: performing static calibration on the partial discharge detection device according to the relevant specifications of partial discharge;
step S130: recording the index result of the static calibration;
step S140: comparing the static calibration index result with the indexes of the relevant standards, and evaluating the static indexes;
the dynamic index evaluation method comprises the following steps:
step S210: generating ps-level pulse signals;
step S220: injecting the ps-level pulse signal into a partial discharge detection device;
step S230: collecting the ps-level pulse signal and an output pulse signal of the partial discharge detection device;
step S240: performing spectrum analysis on the ps-level pulse signal and the output pulse signal according to a spectrum analysis method to obtain a frequency response function, amplitude frequency and phase frequency characteristics;
step S250: and evaluating the dynamic index of the partial discharge detection device according to the undistorted transmission condition of the partial discharge detection device.
Preferably, the step S110 specifically includes:
the controllable pulse generator is used for outputting a positive pulse signal or a negative pulse signal with the charge of 1PC, 10PC, 20PC, 50PC, 70PC or 100 PC.
Preferably, the double pulse signal specifically includes: a pulse with a rise time of 50ns, an amplitude of 0.5V, and a time interval of 0.5, 0.7, 1.0, 2.0, 5.0, 7.0, or 10.0 μ s.
Preferably, the step S250 specifically includes:
if the undistorted transmission condition of the partial discharge detection device is met, judging that the dynamic index of the partial discharge detection device is qualified; otherwise, judging that the dynamic index of the partial discharge detection device is unqualified.
According to the technical scheme, the evaluation method of the partial discharge detection device provided by the embodiment of the invention realizes systematic and accurate evaluation of the performance of the partial discharge detection device, is simple to realize, and reduces the calibration cost of the partial discharge detection device; the system meets the national standard requirements of the partial discharge instrument for evaluation, provides standard reference signals for the calibration and calibration of related equipment, meets the metering requirements, and provides a measuring standard and an evaluation system for the selective purchase of the partial discharge instrument.
Drawings
In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
Fig. 1 is a schematic flowchart of a static indicator evaluation method of a partial discharge detection apparatus according to an embodiment of the present invention;
fig. 2 is a schematic flowchart of a dynamic index evaluation method of a partial discharge detection apparatus according to an embodiment of the present invention.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the drawings in the embodiment of the present invention, and it is obvious that the described embodiment is only a part of the embodiment of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to solve the problem that the performance of the partial discharge detection device cannot be evaluated systematically, comprehensively and accurately in the prior art, the evaluation method of the partial discharge detection device provided by the embodiment of the invention comprises static index evaluation and dynamic index evaluation. Hereinafter, an evaluation method of a partial discharge detection apparatus according to an embodiment of the present invention will be described in detail with reference to the drawings.
Fig. 1 is a schematic flow chart of a static indicator evaluation method of a partial discharge detection apparatus according to an embodiment of the present invention, as shown in fig. 1, which includes the following steps:
step S110: generating a standard pulse signal;
generating a standard pulse signal conforming to the power industry by using a controllable pulse generator, wherein the standard pulse signal comprises: the single positive pulse signal used for linearity calibration, the single negative pulse signal used for polarity influence calibration, the ps-level single pulse signal used for dynamic calibration and the double pulse signal used for calibrating variable repetition rate influence. In a preferred embodiment of the present invention, the controllable pulse generator outputs a positive pulse signal or a negative pulse signal with a charge of 1PC, 10PC, 20PC, 50PC, 70PC or 100PC, and the double pulse signal specifically includes: a pulse with a rise time of 50ns, an amplitude of 0.5V, and a time interval of 0.5, 0.7, 1.0, 2.0, 5.0, 7.0, or 10.0 μ s.
Step S120: performing static calibration on the partial discharge detection device according to the relevant specifications of partial discharge;
the local discharge detection device is statically calibrated according to the latest local discharge related specifications of IEC (international electrotechnical commission) and CIGRE (conference international electrotechnical commission), wherein the static calibration comprises linearity, sensitivity, variable repetition rate response, cut-off frequency, polarity influence and the like.
Step S130: recording the index result of the static calibration;
and the oscilloscope collects an output pulse signal of the partial discharge detection device.
The recorded static indicators include: linearity, polar effects, sensitivity, cut-off frequency, variable repetition rate response.
Linearity: when the controllable pulse generator inputs positive pulses with charges of 1PC, 10PC, 20PC, 50PC, 70PC and 100PC to the partial discharge monitoring device to be detected, an oscilloscope is used for collecting output pulse signals of the partial discharge monitoring device to be detected, and the relation between the amplitude of the output pulse signals and the input pulse charges is the linearity of the positive pulses of the partial discharge monitoring device to be detected.
When the controllable pulse generator inputs negative pulses with charges of 1PC, 10PC, 20PC, 50PC, 70PC and 100PC to the partial discharge monitoring device to be detected, an oscilloscope is used for collecting output pulse signals of the partial discharge monitoring device to be detected, and the relation between the amplitude of the output pulse signals and the input pulse charges is the linearity of the partial discharge monitoring device to be detected to the negative pulses.
Polar effects: and comparing the linearity relation of the positive pulse and the negative pulse of the partial discharge detection device to be detected, and analyzing the influence of the pulse polarity on the partial discharge detection device to be detected.
Sensitivity: the differential of the amplitude of the output pulse signal and the linearity of the input pulse charge is the sensitivity of the partial discharge detection device.
Lower cut-off frequency error: inputting frequency f to the partial discharge monitoring device to be detected by using a controllable pulse generatorCInput voltage UCIs a pulse signal of 0.1V-1V,
maintaining input voltage UCWithout change, the center frequency f is reducedCRecording the output voltage value at this time as UZ；
Continuously decreasing the center frequency fCTo the output voltage UZIs 0.707UZRecord the frequency at this time as f1；
Continuing to lower the center frequency fCTo the output voltage UZIs 0.5UZ,0.25UZ，0.1UZRecording the frequency value of each test point;
if it is 0.5UZ，0.25UZ，0.1UZCorresponding frequencies are respectively greater than 0.5f1，0.25f1，0.1f1Recording the cut-off frequency error asf1The calculation formula is as follows:
wherein,fC-a center frequency; f. ofH-an upper cut-off frequency; f. ofL-a lower cut-off frequency.
Upper cut-off frequency error:inputting frequency f to the partial discharge monitoring device to be detected by using a controllable pulse generatorCInput voltage UCIs a pulse signal of 0.1V-1V,
maintaining input voltage UCWithout change, raising the center frequency fCRecording the output voltage value at this time as UZ；
Continuously raising the center frequency fCTo the output voltage UZIs 0.707UZRecord the frequency at this time as f2；
Continue to raise the center frequency fCTo the output voltage UZIs 0.5UZ,0.25UZ，0.1UZRecording the frequency value of each test point;
if it is 0.5UZ，0.25UZ，0.1UZCorresponding frequencies are respectively greater than 0.5f2，0.25f2，0.1f2Recording the cut-off frequency error asf2The calculation formula is as follows:
wherein,fC-a center frequency; f. ofH-an upper cut-off frequency; f. ofL-a lower cut-off frequency.
Variable repetition rate response: inputting a double-pulse signal to the partial discharge detection device to be detected, and analyzing the response influence of the variable repetition frequency pulse according to the output pulse signal acquired by the oscilloscope.
The above analysis of linearity, polar effect, sensitivity, cut-off frequency, and variable repetition rate response is only an exemplary illustration of the present invention, and those skilled in the art can adjust the above analysis according to actual needs, which all fall within the protection scope of the present invention.
Step S140: comparing the static calibration index result with the indexes of the relevant standards, and evaluating the static indexes;
comparing and analyzing the static indexes recorded in the step S10, such as linearity, polar influence, sensitivity, cut-off frequency, and variable repetition rate response, with indexes of relevant standards, and evaluating and calibrating the static performance of the partial discharge device to be tested according to the static indexes of the partial discharge device to be tested.
The above-mentioned method for evaluating the static index of the partial discharge detection apparatus is only an exemplary illustration of the embodiment of the present invention, and those skilled in the art can adjust the method according to actual needs, which all fall within the protection scope of the present invention.
Fig. 2 is a schematic flow chart of a dynamic index evaluation method of a partial discharge detection apparatus according to an embodiment of the present invention, as shown in fig. 2, including the following steps:
step S210: generating ps-level pulse signals;
and generating ps-level monopulse signals by using a controllable pulse generator.
Step S220: and injecting the ps-level pulse signal into a partial discharge detection device.
Step S230: and collecting the ps-level pulse signal and an output pulse signal of the partial discharge detection device.
Step S240: and performing spectrum analysis on the ps-level pulse signal and the output pulse signal according to a spectrum analysis method to obtain a frequency response function, amplitude frequency and phase frequency characteristics.
And obtaining the dynamic characteristics, namely amplitude-frequency characteristics and phase-frequency characteristics, of the partial discharge detection device to be detected according to the obtained frequency response function.
Step S250: according to undistorted transmission conditions of the partial discharge detection device, performing dynamic index evaluation on the partial discharge detection device;
the condition of undistorted transmission of the partial discharge detection device provided by the embodiment of the invention is as follows: the amplitude spectrum is a straight line parallel to the frequency coordinate and the phase spectrum is a linear straight line. If the undistorted transmission condition of the partial discharge detection device is met, judging that the dynamic index of the partial discharge detection device is qualified; otherwise, judging that the dynamic index of the partial discharge detection device is unqualified.
Of course, the above-mentioned method for evaluating the dynamic index of the partial discharge detection apparatus is only an exemplary illustration of the embodiment of the present invention, and those skilled in the art can adjust the method according to actual needs, which all fall within the protection scope of the present invention.
In order to facilitate the technical solution better understood by those skilled in the art, the following further description is provided in conjunction with the specific implementation process of the evaluation method of the partial discharge detection apparatus.
When the evaluation method of the partial discharge detection device provided by the embodiment of the invention is adopted to evaluate the partial discharge detection device, the static index evaluation and the dynamic index evaluation are carried out on the partial discharge detection device to be tested. When static index evaluation is carried out, according to relevant specifications of partial discharge, standard pulse signals which are in line with the power industry are input to the partial discharge detection device, wherein the standard pulse signals comprise a single positive pulse signal used for linearity calibration, a single negative pulse signal used for polarity influence calibration, a ps-level single pulse signal used for dynamic calibration and a double pulse signal used for calibrating variable repetition rate influence. The oscilloscope collects output pulse signals, records static calibration index results, compares the static calibration index results with indexes of relevant standards, and evaluates the static indexes, wherein the evaluated static indexes comprise: linearity, polar effects, sensitivity, cut-off frequency, variable repetition rate response.
When dynamic index evaluation is carried out, injecting the ps-level pulse signal into the discharge detection device, carrying out spectrum analysis on the ps-level pulse signal and the output pulse signal according to a spectrum analysis method to obtain a frequency response function, and further analyzing dynamic characteristics, namely amplitude-frequency characteristics and phase-frequency characteristics, of the partial discharge detection device to be detected; and evaluating whether the dynamic index of the partial discharge detection device is qualified or not according to the undistorted transmission condition.
The evaluation method of the partial discharge detection device provided by the embodiment of the invention realizes systematic and accurate evaluation of the performance of the partial discharge detection device, and has the advantages of simple realization and low calibration cost; the system meets the national standard requirements of the partial discharge instrument for evaluation, provides a standard reference signal for calibration and calibration of related equipment, and provides a measuring standard and an evaluation system for selective purchase of the partial discharge instrument.
The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
The foregoing is directed to embodiments of the present invention, and it is understood that various modifications and improvements can be made by those skilled in the art without departing from the spirit of the invention.
Claims (4)
1. An evaluation method of a partial discharge detection device is characterized by comprising a static index evaluation method and a dynamic index evaluation method;
the static index evaluation method comprises the following steps:
step S110: generating a standard pulse signal;
step S120: performing static calibration on the partial discharge detection device according to the relevant specifications of partial discharge;
step S130: recording the index result of the static calibration;
step S140: comparing the static calibration index result with the indexes of the relevant standards, and evaluating the static indexes;
the dynamic index evaluation method comprises the following steps:
step S210: generating ps-level pulse signals;
step S220: injecting the ps-level pulse signal into a partial discharge detection device;
step S230: collecting the ps-level pulse signal and an output pulse signal of the partial discharge detection device;
step S240: performing spectrum analysis on the ps-level pulse signal and the output pulse signal according to a spectrum analysis method to obtain a frequency response function, amplitude frequency and phase frequency characteristics;
step S250: and evaluating the dynamic index of the partial discharge detection device according to the undistorted transmission condition of the partial discharge detection device.
2. The method for evaluating a partial discharge detection apparatus according to claim 1, wherein the step S110 specifically includes:
the controllable pulse generator is used for outputting a positive pulse signal or a negative pulse signal with the charge of 1PC, 10PC, 20PC, 50PC, 70PC or 100 PC.
3. The method for evaluating a partial discharge detection apparatus according to claim 2, wherein the double pulse signal specifically includes: a pulse with a rise time of 50ns, an amplitude of 0.5V, and a time interval of 0.5, 0.7, 1.0, 2.0, 5.0, 7.0, or 10.0 μ s.
4. The method for evaluating a partial discharge detection apparatus according to claim 1, wherein the step S250 specifically includes:
if the undistorted transmission condition of the partial discharge detection device is met, judging that the dynamic index of the partial discharge detection device is qualified; otherwise, judging that the dynamic index of the partial discharge detection device is unqualified.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610055963.0A CN105467346A (en) | 2016-01-27 | 2016-01-27 | Partial discharge detection device evaluation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610055963.0A CN105467346A (en) | 2016-01-27 | 2016-01-27 | Partial discharge detection device evaluation method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105467346A true CN105467346A (en) | 2016-04-06 |
Family
ID=55605256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610055963.0A Pending CN105467346A (en) | 2016-01-27 | 2016-01-27 | Partial discharge detection device evaluation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105467346A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106054098A (en) * | 2016-08-16 | 2016-10-26 | 国网天津市电力公司 | Partial discharge on-site calibration method for high-voltage cable line GIS terminal |
| CN106646313A (en) * | 2016-12-12 | 2017-05-10 | 国网北京市电力公司 | Apparatus, method and device for verifying TEV (transient earth voltage) local discharge live detection device |
| CN107589388A (en) * | 2017-09-13 | 2018-01-16 | 中国电力科学研究院 | The method of evaluating performance of high-frequency method shelf depreciation live detection equipment |
| CN107861033A (en) * | 2017-10-24 | 2018-03-30 | 广州供电局有限公司 | The calibration method and system of oscillation wave partial discharge detection system position error |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011252778A (en) * | 2010-06-02 | 2011-12-15 | Tohoku Electric Power Co Inc | Method for detecting partial discharge of electrical device using magnetic field probe |
| CN102866375A (en) * | 2012-09-07 | 2013-01-09 | 广东电网公司电力科学研究院 | System and method for calibrating receiving performance of partial-discharge ultrahigh frequency detection device |
| CN103207377A (en) * | 2013-03-21 | 2013-07-17 | 华北电力大学 | Calibration system and calibration method of partial discharge ultrahigh frequency detection device |
| CN104569894A (en) * | 2015-01-27 | 2015-04-29 | 上海交通大学 | Partial discharge ultra-high frequency (UHF) sensor performance evaluation method based on time domain parameters |
| CN104991210A (en) * | 2015-06-27 | 2015-10-21 | 云南电网有限责任公司电力科学研究院 | Evaluation method for partial discharge detection device, and calibration device |
-
2016
- 2016-01-27 CN CN201610055963.0A patent/CN105467346A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011252778A (en) * | 2010-06-02 | 2011-12-15 | Tohoku Electric Power Co Inc | Method for detecting partial discharge of electrical device using magnetic field probe |
| CN102866375A (en) * | 2012-09-07 | 2013-01-09 | 广东电网公司电力科学研究院 | System and method for calibrating receiving performance of partial-discharge ultrahigh frequency detection device |
| CN103207377A (en) * | 2013-03-21 | 2013-07-17 | 华北电力大学 | Calibration system and calibration method of partial discharge ultrahigh frequency detection device |
| CN104569894A (en) * | 2015-01-27 | 2015-04-29 | 上海交通大学 | Partial discharge ultra-high frequency (UHF) sensor performance evaluation method based on time domain parameters |
| CN104991210A (en) * | 2015-06-27 | 2015-10-21 | 云南电网有限责任公司电力科学研究院 | Evaluation method for partial discharge detection device, and calibration device |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106054098A (en) * | 2016-08-16 | 2016-10-26 | 国网天津市电力公司 | Partial discharge on-site calibration method for high-voltage cable line GIS terminal |
| CN106054098B (en) * | 2016-08-16 | 2019-01-15 | 国网天津市电力公司 | Voltage Cable Lines Construction GIS terminal shelf depreciation field calibration method |
| CN106646313A (en) * | 2016-12-12 | 2017-05-10 | 国网北京市电力公司 | Apparatus, method and device for verifying TEV (transient earth voltage) local discharge live detection device |
| CN107589388A (en) * | 2017-09-13 | 2018-01-16 | 中国电力科学研究院 | The method of evaluating performance of high-frequency method shelf depreciation live detection equipment |
| CN107861033A (en) * | 2017-10-24 | 2018-03-30 | 广州供电局有限公司 | The calibration method and system of oscillation wave partial discharge detection system position error |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3423850B1 (en) | Device and method for measuring internal impedance of a test battery using frequency response | |
| JP4797175B2 (en) | Method and apparatus for measuring partial discharge charge | |
| CN104991210B (en) | The evaluation method and caliberating device of a kind of local discharge detection device | |
| CN105467346A (en) | Partial discharge detection device evaluation method | |
| EP2957918A1 (en) | Synchronous phasor measurement method applicable to p-type phasor measurement unit (mpu) | |
| WO2016042675A1 (en) | Partial discharge measurement device, partial discharge measurement method, and program | |
| US20150142344A1 (en) | Method and apparatus for measuring partial discharge charge value in frequency domain | |
| Mor et al. | Estimation of charge, energy and polarity of noisy partial discharge pulses | |
| CN105954698A (en) | Examination and verification device for noncontact ultrasonic method partial discharge detector and examination and verification method thereof | |
| CN106771897A (en) | A kind of GIS ultrahigh frequency partial discharge signal attenuation test system and method | |
| CN118275838B (en) | Partial discharge detection system based on neural network | |
| JP2721799B2 (en) | Machine abnormality judgment method | |
| CN106526317A (en) | Phasor measurement accuracy assessment method and assessment apparatus for synchronized phasor measurement unit | |
| EP2183608B2 (en) | Instrument and a method for detecting partial electrical discharges occurring in an electric apparatus | |
| CN107991536B (en) | Temperature correction method and equipment for frequency domain dielectric response test | |
| CN109683028B (en) | Electrostatic detection method and device | |
| CN104360178A (en) | Method for measuring low-frequency noise of inverters and diagnosing faults thereof | |
| KR101820040B1 (en) | Apparatus and method for measuring a partial discharging pulse | |
| Klueter et al. | Time domain analysis of partial discharges at DC voltage in air and insulation oil | |
| Prochazka et al. | Determination of frequency characteristics of high voltage dividers in frequency domain | |
| KR101515231B1 (en) | A method of partial discharge diagnosis for gas insulated switchgear | |
| CN205210296U (en) | A detecting system for detecting partial discharge detector | |
| Prochazka et al. | Verification of partial discharge calibrators | |
| CN206863197U (en) | A kind of verifying attachment of the extra-high video sensor based on GHz transverse electro-magnetic wave signal | |
| KR101832190B1 (en) | Apparatus and method for diagnosing a partial discharging having a calibration funtiality |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160406 |
|
| WD01 | Invention patent application deemed withdrawn after publication |