CN110967601A - Transformer bushing partial discharge multidimensional detection method - Google Patents
Transformer bushing partial discharge multidimensional detection method Download PDFInfo
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- CN110967601A CN110967601A CN201911145290.8A CN201911145290A CN110967601A CN 110967601 A CN110967601 A CN 110967601A CN 201911145290 A CN201911145290 A CN 201911145290A CN 110967601 A CN110967601 A CN 110967601A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1209—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 using acoustic measurements
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1218—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 using optical methods; using charged particle, e.g. electron, beams or X-rays
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
Abstract
The invention discloses a multi-dimensional detection method for partial discharge of a transformer bushing, which comprises a multi-dimensional signal acquisition module, a multi-dimensional signal transmission module and a multi-dimensional signal combination analysis module. The multi-dimensional signal acquisition module comprises an ultrahigh frequency signal sensor, a high frequency current signal sensor and an optical fiber sensor and is used for acquiring partial discharge signals of the transformer bushing; the multi-dimensional signal transmission module is used for transmitting different types of signals received by the sensors; the multidimensional signal combination analysis module is used for jointly analyzing three signals, realizing the primary positioning of the partial discharge source, and being capable of judging the partial discharge severity and estimating the partial discharge development. The invention carries out omnibearing detection on the insulation state of the transformer bushing based on a plurality of detection modes, simultaneously ensures the high efficiency and reliability of data transmission, and can accurately judge whether the transformer bushing has faults and carry out early warning, thereby avoiding accidents and ensuring that the transformer can safely and stably run.
Description
Technical Field
The invention belongs to the technical field of partial discharge detection of power systems, and particularly relates to a partial discharge joint detection method for a transformer bushing.
Background
The transformer bushing is a device for supporting the outgoing line of the transformer. In recent years, due to frequent sleeve accidents, the current main transformer sleeve-based detection technology mainly comprises methods of capacitance/dielectric loss, dielectric spectrum detection and the like, the measurement accuracy is unstable, the method is easy to be interfered by electromagnetic waves, and a tail screen needs to be modified to a certain extent on the basis of stopping a transformer, so that potential safety hazards are brought. Therefore, the current casing detection technology cannot find faults in time or has the defects of low sensitivity and the like, and a new detection method and a new idea are urgently needed.
Faults occurring in the operation of the transformer bushing include local breakdown of a capacitive screen, poor contact of a tail screen, poor sealing of the bushing, leakage oil and the like in the operation process, and the long-time shutdown of the transformer can be caused by emergency replacement of the bushing. Therefore, the defects and faults of the transformer bushing have the characteristics of large fault loss, wide fault influence range, long recovery time and the like. In view of this, strengthen detection and aassessment of transformer high-voltage bushing insulating state, prevent transformer high-voltage bushing trouble, to improving the operation safe reliability of transformer and have the great meaning.
Disclosure of Invention
The purpose of the invention is as follows:
aiming at the problems in the prior art, the invention provides a multi-dimensional detection method for partial discharge of a transformer bushing, which can detect the partial discharge fault of the transformer bushing more comprehensively.
The technical scheme is as follows:
the technical scheme adopted by the invention is as follows:
a multi-dimensional detection method for partial discharge of a transformer bushing is characterized by comprising the following steps: the device comprises a multi-dimensional signal acquisition module, a multi-dimensional signal transmission module and a multi-dimensional signal combination analysis module; the multi-dimensional signal acquisition module is used for acquiring partial discharge signals of the transformer bushing, and comprises an ultrahigh frequency signal sensor, a high frequency current signal sensor and an optical fiber sensor; the signal transmission module is used for synchronously transmitting partial discharge signals in different forms; and the multi-dimensional signal combination analysis module is used for jointly analyzing the three signals. The ultrahigh frequency signal sensor can realize non-contact type partial discharge online measurement outside the sleeve; the high-frequency current sensor can detect high-frequency pulse current generated due to partial discharge; the optical fiber sensor mainly comprises a delay optical fiber, a sensing optical fiber, a photoelectric detector, a coupler and a broadband light source, and the vibration generated by partial discharge causes phase difference in a light path so as to further influence output light intensity, so that detection amplitude changes are caused, and partial discharge in the sleeve can be detected.
Further, the ultrahigh frequency sensor array is arranged outside the transformer bushing and is not in contact with the bushing; the high-frequency current sensor is arranged on a lead wire of the sleeve tap grounding; sensing optical fibers in the optical fiber sensor are tightly wound on the upper surface of the mounting flange of the transformer bushing.
Furthermore, the multidimensional signal combination analysis module can determine whether the signal received by the sensing unit is caused by partial discharge in the sleeve according to the collected multidimensional signal; the position, the discharge type and the severity of the partial discharge source are judged according to the combination of the signals, and the development trend of the partial discharge can be further estimated by integrating the three kinds of information.
Further, the method for judging whether partial discharge is generated is to analyze according to the characteristics of three detection methods, aiming at the discharge phenomena which have obvious vibration and can be transmitted through the mechanical structure of the sleeve body, including the discharge and even breakdown phenomena of external faults (a top high-voltage end, a tail screen, a lower porcelain bushing and a voltage-sharing cover) of the sleeve and the internal discharge of a capacitor core, the signals received by the optical fiber sensor can be used as first judgment information, and meanwhile, ultrahigh frequency and high frequency pulse current sensing signals are combined to be used as second judgment information; aiming at the discharge phenomenon with relatively smaller attenuation when the electromagnetic wave is transmitted, including external faults of the sleeve and partial discharge in insulating oil in the sleeve, the ultrahigh frequency signal is used as first judgment information; aiming at the discharge phenomenon affecting the sleeve grounding loop, the method comprises partial discharge in a tail screen, a lower porcelain bushing, a voltage-sharing cover, the interior of a capacitor core and insulating oil in a sleeve, and a high-frequency pulse current signal is used as first judgment information. The characteristics of different faults correspond to the signals received by the three sensors, so that interference and misjudgment are avoided, and whether discharge really exists is determined.
Furthermore, the position of the partial discharge source in the casing needs to be judged by integrating the characteristics of the three signals for analysis. After the partial discharge is determined to exist, the possible position of the partial discharge can be preliminarily determined according to the three discrimination information. According to the time of a signal reaching an external ultrahigh frequency sensor array, the partial discharge phenomenon outside a sleeve (a top high-voltage end, an end screen, a lower porcelain bushing and a voltage-sharing cover) can be positioned, and the partial discharge phenomenon is verified through optical fiber sensing and high-frequency current sensing; when the internal insulating oil discharges, the optical fiber sensor cannot receive signals of the internal insulating oil, and the faults can be judged from ultrahigh frequency signals and high frequency current signals; the internal discharge and even the breakdown discharge of the capacitor core can be judged from the optical fiber sensing signal and the high-frequency current signal of the end screen grounding.
Further, the judgment of the severity of the partial discharge and the estimation of the development of the partial discharge are realized according to different signal strengths. Specifically, after the discharge position is determined, the severity of the partial discharge can be determined according to the amplitudes of the three signals, and the larger the amplitude of the partial discharge signal is, the more serious the partial discharge signal is. And the specific discharge type and the quantitative analysis partial discharge degree are obtained by analyzing the discharge times and the charge quantity in the high-frequency current signal and the ultrahigh-frequency signal for statistics, so that the whole insulation is reliably evaluated.
In a second aspect, the present invention provides a joint detection concept for partial discharge of a transformer bushing, including:
detecting the early partial discharge signal of the casing by various detection modes; the joint analysis of various physical quantities can relatively comprehensively determine the discharge fault type and make state evaluation; the detection means can complement each other well, the optical fiber can judge the distance according to the vibration, the ultrahigh frequency signal is judged according to the strength and the time delay of the signal, then the high frequency current sensing is integrated to draw three spectrograms, the position of partial discharge and the type of the partial discharge can be judged and judged, and the development of the partial discharge can be estimated.
Has the advantages that: the method provides a multi-dimensional detection method for partial discharge of the transformer bushing, the partial discharge signals of the transformer bushing are acquired by adopting three different detection means on the transformer bushing, and then the judgment of the discharge type and the discharge position of the bushing is realized through subsequent signal processing and signal analysis.
Drawings
FIG. 1 is a schematic view of a sensor arrangement of the present invention;
fig. 2 is a flow chart of the operation of the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings.
As shown in fig. 1, the present invention provides a transformer bushing partial discharge monitoring system, which includes a transformer bushing 1, an ultrahigh frequency sensor 2, a high frequency current sensor 3, a sensing optical fiber 4, a photoelectric converter 5, a data synchronous transmission unit 6, and an upper computer 7.
The ultrahigh frequency sensor 2 is arranged outside the sleeve and is not in contact with the sleeve, the high frequency current sensor 3 is arranged on a grounding wire of an end screen of the sleeve, the sensing optical fiber 4 is wound on the surface of a sleeve flange, and an output optical signal is input to the upper computer 7 for analysis through the photoelectric converter 5, the ultrahigh frequency signal and the high frequency current signal through the data synchronization unit 6.
Aiming at the discharge phenomena which have obvious vibration and can be transmitted through the mechanical structure of the sleeve body, including the phenomena of external faults (a top high-voltage end, a tail screen, a lower porcelain bushing and a voltage-sharing cover) of the sleeve, internal discharge and even breakdown of a capacitor core, signals received by the optical fiber sensor can be used as first judgment information, and meanwhile, ultrahigh frequency and high frequency pulse current sensing signals are combined to be used as second judgment information; aiming at the discharge phenomenon with relatively smaller attenuation when the electromagnetic wave is transmitted, including external faults of the sleeve and partial discharge in insulating oil in the sleeve, the ultrahigh frequency signal is used as first judgment information; aiming at the discharge phenomenon affecting the sleeve grounding loop, the method comprises partial discharge in a tail screen, a lower porcelain bushing, a voltage-sharing cover, the interior of a capacitor core and insulating oil in a sleeve, and a high-frequency pulse current signal is used as first judgment information. The characteristics of different faults correspond to the signals received by the three sensors, so that interference and misjudgment are avoided, and whether discharge really exists is determined. After the partial discharge is determined to exist, the possible position of the partial discharge can be preliminarily determined according to the three discrimination information. According to the time of a signal reaching an external ultrahigh frequency sensor array, the partial discharge phenomenon outside a sleeve (a top high-voltage end, an end screen, a lower porcelain bushing and a voltage-sharing cover) can be positioned, and the partial discharge phenomenon is verified through optical fiber sensing and high-frequency current sensing; when the internal insulating oil discharges, the optical fiber sensor cannot receive signals of the internal insulating oil, and the faults can be judged from ultrahigh frequency signals and high frequency current signals; the internal discharge and even the breakdown discharge of the capacitor core can be judged from the optical fiber sensing signal and the high-frequency current signal of the end screen grounding. After the discharge position is determined, the severity of the partial discharge can be judged according to the amplitudes of the three signals, and the larger the amplitude of the partial discharge signal is, the more serious the partial discharge signal is. And the specific discharge type and the quantitative analysis partial discharge degree are obtained by analyzing the discharge times and the charge quantity in the high-frequency current signal and the ultrahigh-frequency signal for statistics, so that the whole insulation is reliably evaluated.
The present invention will be described in further detail below by way of specific examples. It should be understood that the scope of the above-described subject matter is not limited to the following examples, and any techniques implemented based on the disclosure of the present invention are within the scope of the present invention.
The ultrahigh frequency signal can detect most partial discharge signals due to strong anti-jamming capability, the integral capacitance of the sleeve can be reflected on the high-frequency current sensor due to obvious change generated by partial discharge, but the top distance of the sleeve is far and the influence on the integral capacitance is not large during discharge, so that the high-frequency current sensor cannot detect the faults, and the optical fiber sensor detects the faults by transmitting vibration according to the mechanical structure of the sleeve, so that effective signals can be obviously detected at the parts close to the flange, such as a voltage-equalizing cover and a tail screen, but if the distance is too far or in the sleeve, the effectiveness of the signals cannot be ensured if the partial discharge is weak.
Based on the analysis, when a fault of a certain faulty transformer bushing ① cannot be determined through external observation, after the three detection modes are adopted according to the above modes, an external ultrahigh frequency sensor and a high frequency current sensor can receive obvious signals, and the amplitude change of the ultrahigh frequency signal is judged by adjusting an ultrahigh frequency sensor array, so that the ultrahigh frequency signal can be determined not to be generated from the top of the bushing and the lower part of a flange, because the maximum value of the ultrahigh frequency signal can be received near an upper porcelain bushing, which indicates that the fault is in a capacitor core or insulating oil, and the output signal of an optical fiber detector is small and not obvious enough, which indicates that the fault is in the bushing, and the influence on the structure of the body is small, namely the structure of a top high-voltage end-guide rod-lower porcelain bushing-pressure equalizing cover, in addition, the data of the three sensors are statistically analyzed, and the discharge type can be basically determined to be air gap discharge between oil paper insulation through pulse sequence spectrogram analysis distinguished from phases, so that the judgment of the discharge position is also verified.
For external discharge faults such as a bushing which is locally discharged at a high-voltage end at the top of the bushing, an optical fiber and ultrahigh frequency sensing are actually adopted to acquire an obvious signal, an ultrahigh frequency sensor can acquire a relatively strong ultrahigh frequency signal near the top, and the vibration of the ultrahigh frequency sensor is transmitted to a sensing optical fiber of a lower porcelain bushing, so that the optical path of the ultrahigh frequency sensor is obviously changed, and an obvious vibration signal is acquired; the presence of the top partial discharge is more difficult to detect with high frequency current sensing methods because the top discharge does not form a distinct loop with the ground. In addition, through the positioning of the ultrahigh frequency sensor, the specific position of the top partial discharge can be further determined, and compared with a pulse sequence spectrogram, the type of the partial discharge can be judged to be corona discharge due to the fact that metal spikes exist on the surface of the partial discharge.
Therefore, comprehensive detection of the transformer bushing can be achieved through the multidimensional sensing technology, detection, judgment and positioning of partial discharge can be achieved, and accordingly the insulation condition of the transformer bushing can be accurately evaluated.
The embodiments are only for illustrating the technical idea of the present invention, and the scope of the present invention should not be limited thereby, and any modifications based on the technical idea of the present invention are within the scope of the present invention.
Claims (6)
1. A multi-dimensional detection method for partial discharge of a transformer bushing is characterized by comprising the following steps: the device comprises a multi-dimensional signal acquisition module, a multi-dimensional signal transmission module and a multi-dimensional signal combination analysis module; the multi-dimensional signal acquisition module is used for acquiring partial discharge signals of the transformer bushing, and comprises an ultrahigh frequency signal sensor, a high frequency current signal sensor and an optical fiber sensor; the signal transmission module is used for synchronously transmitting partial discharge signals in different forms; and the multi-dimensional signal combination analysis module is used for jointly analyzing the three signals. The ultrahigh frequency signal sensor can realize non-contact type partial discharge online measurement outside the sleeve; the high-frequency current sensor can detect high-frequency pulse current generated due to partial discharge; the optical fiber sensor mainly comprises a delay optical fiber, a sensing optical fiber, a photoelectric detector, a coupler and a broadband light source, and the vibration generated by partial discharge causes phase difference in a light path so as to further influence output light intensity, so that detection amplitude changes are caused, and partial discharge in the sleeve can be detected.
2. The multi-dimensional detection method for partial discharge of the transformer bushing according to claim 1, wherein the ultrahigh frequency sensor array is arranged outside the transformer bushing without contacting the bushing; the high-frequency current sensor is arranged on a lead wire of the sleeve tap grounding; sensing optical fibers in the optical fiber sensor are tightly wound on the upper surface of the mounting flange of the transformer bushing.
3. The multidimensional detection method for the partial discharge of the transformer bushing according to claim 1, wherein the multidimensional signal combination analysis module is capable of determining whether the signal received by the sensing unit is caused by the partial discharge inside the bushing according to the collected multidimensional signal; the position, the discharge type and the severity of the partial discharge source are judged according to the combination of the signals, and the development trend of the partial discharge can be further estimated by integrating the three kinds of information.
4. The multidimensional detection method for the partial discharge of the transformer bushing according to claim 3, wherein the judgment whether the partial discharge is generated is analyzed according to the characteristics of the three detection methods. Specifically, aiming at the discharge phenomena which have obvious vibration and can be transmitted through the mechanical structure of the sleeve body, including the phenomena of external faults (a top high-voltage end, a tail screen, a lower porcelain bushing and a voltage-sharing cover) of the sleeve, internal discharge and even breakdown of a capacitor core, signals received by the optical fiber sensor can be used as first judgment information, and meanwhile, ultrahigh frequency and high frequency pulse current sensing signals are combined to be used as second judgment information; aiming at the discharge phenomenon with relatively smaller attenuation when the electromagnetic wave is transmitted, including external faults of the sleeve and partial discharge in insulating oil in the sleeve, the ultrahigh frequency signal is used as first judgment information; aiming at the discharge phenomenon affecting the sleeve grounding loop, the method comprises partial discharge in a tail screen, a lower porcelain bushing, a voltage-sharing cover, the interior of a capacitor core and insulating oil in a sleeve, and a high-frequency pulse current signal is used as first judgment information. The characteristics of different faults correspond to the signals received by the three sensors, so that interference and misjudgment are avoided, and whether discharge really exists is determined.
5. The transformer bushing partial discharge joint detection method according to claim 3, wherein the position of the partial discharge source in the bushing is determined by integrating the characteristics of the three signals. Specifically, after the partial discharge is determined to exist, the partial discharge occurrence region and position can be preliminarily determined according to the three discrimination information; according to the time of a signal reaching an external ultrahigh frequency sensor array, the partial discharge phenomenon outside a sleeve (a top high-voltage end, an end screen, a lower porcelain bushing and a voltage-sharing cover) can be positioned, and the partial discharge phenomenon is verified through optical fiber sensing and high-frequency current sensing; when the internal insulating oil discharges, the optical fiber sensor cannot receive signals of the internal insulating oil, and the faults can be judged from ultrahigh frequency signals and high frequency current signals; the internal discharge and even the breakdown discharge of the capacitor core can be judged from the optical fiber sensing signal and the high-frequency current signal of the end screen grounding.
6. The transformer bushing partial discharge joint detection method according to claim 3, wherein the determining the partial discharge severity and the estimating the partial discharge development are performed according to different signal strengths. Specifically, after the discharge position is determined, the severity of the partial discharge can be determined according to the amplitudes of the three signals, and the larger the amplitude of the partial discharge signal is, the more serious the partial discharge signal is. And the specific discharge type is obtained by analyzing the discharge times and the charge quantity in the high-frequency current signal and the ultrahigh-frequency signal, the partial discharge development degree can be quantitatively analyzed, and the whole insulation can be reliably evaluated.
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111458612A (en) * | 2020-05-29 | 2020-07-28 | 国网陕西省电力公司电力科学研究院 | State monitoring and defect simulation system for electrical insulation performance of oil-immersed sleeve |
| CN111929546A (en) * | 2020-07-31 | 2020-11-13 | 广东电网有限责任公司 | Multi-dimensional built-in partial discharge detection system and detection method thereof |
| CN112269107A (en) * | 2020-09-18 | 2021-01-26 | 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 | Flexible straight sleeve anti-seismic test method and circuit considering change of insulation structure |
| CN112630605A (en) * | 2020-11-13 | 2021-04-09 | 广东电网有限责任公司广州供电局 | Partial discharge detection system based on multiple sensors |
| CN112630696A (en) * | 2020-12-07 | 2021-04-09 | 广西电网有限责任公司电力科学研究院 | Capacitive screen coupling simulation testing device |
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| CN114035001A (en) * | 2021-11-16 | 2022-02-11 | 国网福建省电力有限公司电力科学研究院 | High-frequency multi-terminal partial discharge detection positioning method and device for voltage withstand test of transformer |
| CN114252749A (en) * | 2022-02-28 | 2022-03-29 | 国网湖北省电力有限公司检修公司 | Transformer partial discharge detection method and device based on multiple sensors |
| CN116540041A (en) * | 2023-06-30 | 2023-08-04 | 国网安徽省电力有限公司电力科学研究院 | Method for detecting surface discharge fault of high-voltage sleeve |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2590002Y (en) * | 2002-09-18 | 2003-12-03 | 新疆特变电工股份有限公司 | Transformer partial discharge online monitor |
| US20060132144A1 (en) * | 2004-12-16 | 2006-06-22 | Tatsuro Kato | Method and system for monitoring partial discharge in gas-insulated apparatus |
| CN104007369A (en) * | 2013-10-23 | 2014-08-27 | 海南电力技术研究院 | Online power transformer fault positioning system based on ultra-high-frequency external sensors |
| CN104749498A (en) * | 2015-01-28 | 2015-07-01 | 西安交通大学 | Portable partial discharge detecting and diagnosing device |
| CN105629139A (en) * | 2015-12-29 | 2016-06-01 | 武汉大学 | Gas insulated electrical equipment partial discharge multi-source combined monitoring experiment device |
| CN105911437A (en) * | 2016-04-11 | 2016-08-31 | 国网天津市电力公司 | Method for accurately positioning GIS partial discharge |
| CN106093736A (en) * | 2016-08-17 | 2016-11-09 | 西安交通大学 | The ultrasonic optical fiber sensing system of the tunable shelf depreciation of frequency response characteristic and method |
| KR20170037325A (en) * | 2015-09-25 | 2017-04-04 | 한국전력공사 | System and method for detecting partial discharge in ultra high voltage transformer |
| CN207408542U (en) * | 2017-11-27 | 2018-05-25 | 哈尔滨理工大学 | A kind of partial discharge of transformer on-line monitoring system based on optical fiber |
| CN207601231U (en) * | 2017-11-01 | 2018-07-10 | 浙江群力电气有限公司 | A kind of Partial Discharge Online Monitoring of Transformers system based on acooustic combination |
| CN109239008A (en) * | 2018-08-24 | 2019-01-18 | 南京航空航天大学 | A kind of oil-immersed transformer fault detection means based on micro-nano optical fiber evanescent field |
| CN208506188U (en) * | 2018-03-16 | 2019-02-15 | 深圳供电局有限公司 | A kind of built-in SF6 gas-insulated transformer partial discharge monitoring system |
-
2019
- 2019-11-21 CN CN201911145290.8A patent/CN110967601B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2590002Y (en) * | 2002-09-18 | 2003-12-03 | 新疆特变电工股份有限公司 | Transformer partial discharge online monitor |
| US20060132144A1 (en) * | 2004-12-16 | 2006-06-22 | Tatsuro Kato | Method and system for monitoring partial discharge in gas-insulated apparatus |
| CN104007369A (en) * | 2013-10-23 | 2014-08-27 | 海南电力技术研究院 | Online power transformer fault positioning system based on ultra-high-frequency external sensors |
| CN104749498A (en) * | 2015-01-28 | 2015-07-01 | 西安交通大学 | Portable partial discharge detecting and diagnosing device |
| KR20170037325A (en) * | 2015-09-25 | 2017-04-04 | 한국전력공사 | System and method for detecting partial discharge in ultra high voltage transformer |
| CN105629139A (en) * | 2015-12-29 | 2016-06-01 | 武汉大学 | Gas insulated electrical equipment partial discharge multi-source combined monitoring experiment device |
| CN105911437A (en) * | 2016-04-11 | 2016-08-31 | 国网天津市电力公司 | Method for accurately positioning GIS partial discharge |
| CN106093736A (en) * | 2016-08-17 | 2016-11-09 | 西安交通大学 | The ultrasonic optical fiber sensing system of the tunable shelf depreciation of frequency response characteristic and method |
| CN207601231U (en) * | 2017-11-01 | 2018-07-10 | 浙江群力电气有限公司 | A kind of Partial Discharge Online Monitoring of Transformers system based on acooustic combination |
| CN207408542U (en) * | 2017-11-27 | 2018-05-25 | 哈尔滨理工大学 | A kind of partial discharge of transformer on-line monitoring system based on optical fiber |
| CN208506188U (en) * | 2018-03-16 | 2019-02-15 | 深圳供电局有限公司 | A kind of built-in SF6 gas-insulated transformer partial discharge monitoring system |
| CN109239008A (en) * | 2018-08-24 | 2019-01-18 | 南京航空航天大学 | A kind of oil-immersed transformer fault detection means based on micro-nano optical fiber evanescent field |
Non-Patent Citations (2)
| Title |
|---|
| JOAO B. ROSOLEM 等: "A fiber optic powered sensor designed for partial discharges monitoring on high voltage bushings", 《2015 SBMO/IEEE MTT-S INTERNATIONAL MICROWAVE AND OPTOELECTRONICS CONFERENCE (IMOC)》 * |
| 张强 等: "变压器升高座内部套管局部放电特高频信号传播特征", 《电网技术》 * |
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