CN102243289A - Method and apparatus for partial discharge detection of high-voltage electrical power equipment with hardware anti-interference utilization - Google Patents
Method and apparatus for partial discharge detection of high-voltage electrical power equipment with hardware anti-interference utilization Download PDFInfo
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Abstract
The invention provides a method and an apparatus for partial discharge detection of high-voltage electrical power equipment with hardware anti-interference utilization. The apparatus comprises a main-broadband high-frequency sensor, an auxiliary- broadband high-frequency sensor, a power-frequency voltage sensor and a calculating host of synchronous analysis. The calculating host of synchronous analysis, which comprises a data acquisition module, a data processing module, an interference filtering module, and an input and output module, is used for collecting a partial discharging signal, a background interference signal, and a power frequency voltage signal as well as eliminating an interference and storing data. The main-broadband high-frequency sensor, the auxiliary- broadband high-frequency sensor, and the power-frequency voltage sensor are accessed in parallel to the data acquisition module of the calculating host of synchronous analysis. An advantage of the invention is to utilize hardware; that is, the auxiliary- broadband high-frequency sensor collects alone an interference signal of background noise; and then a difference of the noise signal and the partial discharging signal on a frequency spectrum is utilized, so that an objective of realization of resistance of the background noise interference of the hardware is achieved.
Description
Technical field
The present invention relates to a kind of method and apparatus that is used for the high voltage electric power equip ment Partial Discharge Detection, belong to high voltage electric power equip ment detection technique field, relate in particular to a kind of high voltage electric power equip ment detection method for local discharge and device that adopts hardware anti-interference.
Background technology
Development along with high pressure and ultrahigh voltage power equipment, make its important step, particularly based on transformer, sleeve pipe, power cable and the gas-insulated switch GIS(Gas Insulated Switchgear of interior insulation as urban electricity supply and main grid structure) etc. in electrical network, occupy more and more important position.How realizing the state-detection of insulating power equipment in these high pressure, guarantee the safe and reliable operation of electrical network, is the focus of studying both at home and abroad at present.Shelf depreciation is the important behaviour form of insulating power equipment major insulation deterioration in the high pressure.The detection of shelf depreciation is present judgement, estimate in the high pressure insulating power equipment effective method the most directly perceived,, is the most important technological means of high voltage electric power equip ment repair based on condition of component.
At present both at home and abroad the high voltage electric power equip ment local discharge detection device of development is a lot, but that great majority can only be applied to ground unrest is very little or do not have the laboratory of ground unrest, and ground unrest is simple or ground unrest than the little scene of power equipment major insulation defective.What extensively adopt for off-line both domestic and external or online local discharge detection device at present is to utilize software and expert system to carry out the differentiation and the elimination of ground unrest, also have and utilize the inside and outside dual sensor of equipment to carry out signal magnitude individually to concern filtering, because software and expert system denoising remain rule of thumb to programme noise is judged and eliminated, and the inside and outside dual sensor utilization of equipment is to contain the office's discharge signal of ambient noise signal and the comparison of ambient noise signal amplitude size, cause the complicated electromagnetic interference (EMI) of the local discharge detection device of present rig-site utilization for the scene, particularly the ground unrest noise stronger than fault local discharge signal can't be eliminated, thereby can't be accurate, reliable extraction office discharge signal.Therefore, how eliminate to greatest extent and disturb, the office of extraction fast and accurately discharge signal becomes the important means of the on-the-spot office of high voltage electric power equip ment discharge examination.
Summary of the invention
The objective of the invention is: provide a kind of hardware means of utilizing to eliminate the method and apparatus that Partial Discharge Detection is disturbed, only utilize software to eliminate noise to solve prior art, the amplitude of perhaps only utilizing the inside and outside dual sensor acquired signal of equipment is eliminated noise and can't effectively be suppressed the problem of the on-the-spot various interference that exist.
Technical scheme of the present invention is: a kind of high voltage electric power equip ment local discharge detection device that adopts hardware anti-interference, it comprises main wideband high-frequency sensor, secondary wideband high-frequency sensor, power-frequency voltage sensor and Synchronization Analysis computation host, and described main wideband high-frequency sensor is used for being coupled and contains the local discharge signal of ground unrest; Secondary wideband high-frequency sensor is used for the ambient noise signal that is coupled; The power-frequency voltage sensor is used for producing the power-frequency voltage signal; The Synchronization Analysis computation host comprises data acquisition module, data processing module, interference filtering module and input/output module, be used for finishing collection to major-minor wideband high-frequency sensor and power-frequency voltage sensor generation signal, elimination and the data storage disturbed, it is characterized in that: described main wideband high-frequency sensor, secondary wideband high-frequency sensor, the power-frequency voltage sensor all walks abreast and inserts the data acquisition module of described Synchronization Analysis computation host, and data acquisition module is connected with data processing module in the described Synchronization Analysis computation host, data processing module is connected with the interference filtering module, the interference filtering module is connected with input/output module.
The invention provides a kind of high voltage electric power equip ment detection method for local discharge that adopts hardware anti-interference, adopt aforesaid high voltage electric power equip ment local discharge detection device, described method comprises the steps:
(1) socket master wideband high-frequency sensor on high voltage electric power equip ment ground wire or other earthing device is used for being coupled and contains the local discharge signal of ground unrest; Install secondary wideband high-frequency sensor in the co-located of isolating with the ground connection facility, be used for the ambient noise signal that is coupled; Two sensors all insert the Synchronization Analysis computation host;
(2) connect the power-frequency voltage sensor in lead-in wire on the high voltage electric power equip ment or outlet, the power-frequency voltage sensor inserts the Synchronization Analysis computation host, is used for the triggering of local discharge signal acquisition channel, to determine the power-frequency voltage phase place of local discharge signal;
(3) the Synchronization Analysis computation host is at first gathered the signal of major-minor wideband high-frequency sensor and the generation of power-frequency voltage sensor by data acquisition module, demarcate phase place by data processing module with the power frequency voltage signal then, generation contains the phase place of the local discharge signal of ground unrest, the three-dimensional spectrogram of amplitude and frequency and the phase place of having only ambient noise signal, the three-dimensional spectrogram of amplitude and frequency, the last signal of the major-minor sensor being gathered by the interference filtering module carries out the comparison of frequency spectrum, filtering master wideband high-frequency sensor and secondary wideband high-frequency sensor have the ambient noise signal of same frequency spectrum, thereby catch an innings discharge signal;
(4) thus Synchronization Analysis processing host input/output module demonstrates the local discharge signal spectrogram that comprises apparent discharge capacity, discharge phase, discharge frequency by the data after the filter out background noise are handled, and measurement result is stored.
The invention has the beneficial effects as follows: the invention has the advantages that and utilize hardware, promptly secondary sensor is gathered the ground unrest undesired signal separately, utilizes noise signal and the local discharge signal difference on frequency spectrum then, thereby realizes the purpose that the anti-ground unrest of hardware disturbs; With only depend in the past software and amplitude size relatively the method for anti-noise the raising of matter has been arranged, make local discharge detection device can clearly demonstrate noise, thereby make the filtering noise can be more fast, accurately.
Description of drawings
Fig. 1 is the process flow diagram of the high voltage electric power equip ment detection method for local discharge of the embodiment of the invention.
Fig. 2 is the structural representation of the high voltage electric power equip ment local discharge detection device of the embodiment of the invention.
Embodiment
The present invention is described further below in conjunction with drawings and Examples.
As shown in Figure 1, the method that high voltage electric power equip ment detection method for local discharge of the present invention is eliminated noise is as follows: two wideband high-frequency sensors are set on tested high voltage electric power equip ment synchronously, main wideband high-frequency sensor sleeve is connected on the local discharge signal that is used for containing on the coupled high voltage power equipment ground unrest on the ground wire of high voltage electric power equip ment or the grounding apparatus, and another secondary wideband high-frequency sensor is positioned at same position but isolates with the high voltage electric power equip ment ground wire and is used to be coupled the on-the-spot noise that produces because of the background electromagnetic interference (EMI).Write down the spectrogram (or frequency diagram) of these two broadband high-frequency signals simultaneously; And the frequency spectrum (or frequency) of these two signals relatively synchronously, eliminate main wideband high-frequency sensor that caught with signal secondary wideband high-frequency sensor same frequency spectrum (or frequency), disturb thereby reach to eliminate, quick and precisely catch the purpose of local discharge signal.The frequency range of wideband high-frequency sensor is 30kHz-20MHz.
As shown in Figure 2, the high voltage electric power equip ment local discharge detection device that provides of the embodiment of the invention mainly is made of main wideband high-frequency sensor, secondary wideband high-frequency sensor, power-frequency voltage sensor and Synchronization Analysis computation host.The Synchronization Analysis computation host comprises data acquisition module, data processing module, interference filtering module and input/output module, is used for finishing the collection to major-minor wideband high-frequency sensor and power-frequency voltage sensor generation signal, the elimination of interference and data storage.Wherein main wideband high-frequency sensor, secondary wideband high-frequency sensor, power-frequency voltage sensor all walk abreast and insert the data acquisition module of Synchronization Analysis computation host, and data acquisition module is connected with data processing module in the Synchronization Analysis computation host, data processing module is connected with the interference filtering module, the interference filtering module is connected with input/output module.
The workflow of this device is as follows:
(1) socket master wideband high-frequency sensor on high voltage electric power equip ment ground wire or other earthing device is used for being coupled and contains the local discharge signal of ground unrest; Install secondary wideband high-frequency sensor in the co-located of isolating with the ground connection facility, be used for the ambient noise signal that is coupled; Two sensors all insert the Synchronization Analysis computation host.
(2) connect the power-frequency voltage sensor in lead-in wire on the high voltage electric power equip ment or outlet, the power-frequency voltage sensor inserts the Synchronization Analysis computation host, is used for the triggering of local discharge signal acquisition channel, to determine the power-frequency voltage phase place of local discharge signal.
(3) the Synchronization Analysis computation host is to the data of major-minor wideband high-frequency sensor acquisition, at first demarcate phase place with the power frequency voltage signal, generate the three-dimensional discharge spectrogram that two width of cloth contain signal phase, amplitude, frequency (or frequency), the signal that the major-minor sensor is gathered carries out the comparison of frequency spectrum (or frequency) then, the signal of filtering master wideband high-frequency sensor and secondary wideband high-frequency sensor same frequency spectrum (or frequency), thus an innings discharge signal caught.
(4) thus the Synchronization Analysis processing host by filtering data later being handled the shelf depreciation spectrogram that shows apparent discharge capacity, discharge phase and discharge frequency (or discharge frequency), and measurement result is stored.
Claims (2)
1. high voltage electric power equip ment local discharge detection device that adopts hardware anti-interference, it comprises main wideband high-frequency sensor, secondary wideband high-frequency sensor, power-frequency voltage sensor and Synchronization Analysis computation host, and described main wideband high-frequency sensor is used for being coupled and contains the local discharge signal of ground unrest; Secondary wideband high-frequency sensor is used for the ambient noise signal that is coupled; The power-frequency voltage sensor is used for producing the power-frequency voltage signal; The Synchronization Analysis computation host comprises data acquisition module, data processing module, interference filtering module and input/output module, be used for finishing collection to main wide secondary wideband high-frequency sensor and power-frequency voltage sensor generation signal, elimination and the data storage disturbed, it is characterized in that: described main wideband high-frequency sensor, secondary wideband high-frequency sensor, the power-frequency voltage sensor all walks abreast and inserts the data acquisition module of described Synchronization Analysis computation host, and data acquisition module is connected with data processing module in the described Synchronization Analysis computation host, data processing module is connected with the interference filtering module, the interference filtering module is connected with input/output module.
2. a high voltage electric power equip ment detection method for local discharge that adopts hardware anti-interference adopts high voltage electric power equip ment local discharge detection device as claimed in claim 1, and described method comprises the steps:
(1) socket master wideband high-frequency sensor on high voltage electric power equip ment ground wire or other earthing device is used for being coupled and contains the local discharge signal of ground unrest; Install secondary wideband high-frequency sensor in the co-located of isolating with the ground connection facility, be used for the ambient noise signal that is coupled; Two sensors all insert the Synchronization Analysis computation host;
(2) connect the power-frequency voltage sensor in lead-in wire on the high voltage electric power equip ment or outlet, the power-frequency voltage sensor inserts the Synchronization Analysis computation host, is used for the triggering of local discharge signal acquisition channel, to determine the power-frequency voltage phase place of local discharge signal;
(3) the Synchronization Analysis computation host is at first gathered the signal of major-minor wideband high-frequency sensor and the generation of power-frequency voltage sensor by data acquisition module, demarcate phase place by data processing module with the power frequency voltage signal then, generation contains the phase place of the local discharge signal of ground unrest, the three-dimensional spectrogram of amplitude and frequency and the phase place of having only ambient noise signal, the three-dimensional spectrogram of amplitude and frequency, the last signal of the major-minor sensor being gathered by the interference filtering module carries out the comparison of frequency spectrum, filtering master wideband high-frequency sensor and secondary wideband high-frequency sensor have the ambient noise signal of same frequency spectrum, thereby catch an innings discharge signal;
(4) thus Synchronization Analysis processing host input/output module demonstrates the local discharge signal spectrogram that comprises apparent discharge capacity, discharge phase, discharge frequency by the data after the filter out background noise are handled, and measurement result is stored.
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| CN102944765A (en) * | 2012-11-30 | 2013-02-27 | 中国船舶重工集团公司第七二二研究所 | Low-frequency-stage magnetic sensor background noise measuring method |
| CN104007371A (en) * | 2014-05-15 | 2014-08-27 | 深圳供电局有限公司 | Device and method for checking cable partial discharge signal |
| CN104360242A (en) * | 2014-10-01 | 2015-02-18 | 玉林市科邦技术服务有限公司 | System for online monitoring discharging failures of high-voltage switch cabinet |
| CN104483602A (en) * | 2014-11-28 | 2015-04-01 | 北京兴迪仪器有限责任公司 | Local discharge signal identification method and device |
| CN104977515A (en) * | 2015-07-17 | 2015-10-14 | 许继集团有限公司 | Method for identifying discharge type in three-phase same-cylinder GIS partial discharge monitoring |
| CN105606975A (en) * | 2016-03-09 | 2016-05-25 | 武汉华威众科电力有限公司 | Localizable ultrahigh-frequency cable partial discharge detection method and device |
| CN105629144A (en) * | 2016-03-11 | 2016-06-01 | 华乘电气科技（上海）股份有限公司 | High voltage switchgear partial discharge diagnosis method and system based on fingerprint database |
| CN106353648A (en) * | 2016-08-30 | 2017-01-25 | 浙江新图维电子科技有限公司 | Comprehensive partial discharge monitoring device and method |
| CN107329067A (en) * | 2017-06-16 | 2017-11-07 | 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 circuit for eliminating 12 pulsation interference |
| CN107942206A (en) * | 2017-10-16 | 2018-04-20 | 国网河北能源技术服务有限公司 | A kind of GIS partial discharge on-Line Monitor Device and localization method |
| CN108333487A (en) * | 2018-02-05 | 2018-07-27 | 南通尚力机电工程设备有限公司 | A kind of power equipment partial discharge detecting system |
| CN108333482A (en) * | 2018-01-17 | 2018-07-27 | 南通尚力机电工程设备有限公司 | A kind of measurement method of GIS partial discharge pattern-recognition |
| CN108646151A (en) * | 2018-05-10 | 2018-10-12 | 东南大学 | Cable discharge acoustic detector based on adaptive noise reduction |
| CN109254227A (en) * | 2017-07-13 | 2019-01-22 | 全球能源互联网欧洲研究院 | Detection method, apparatus and system towards electric network state |
| CN112130035A (en) * | 2020-09-11 | 2020-12-25 | 国网福建省电力有限公司检修分公司 | Insulator discharge sound wave and electromagnetic wave detection method and device based on unmanned aerial vehicle |
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| CN102944765B (en) * | 2012-11-30 | 2015-02-11 | 中国船舶重工集团公司第七二二研究所 | Low frequency magnetic sensor background noise measuring method |
| CN102944765A (en) * | 2012-11-30 | 2013-02-27 | 中国船舶重工集团公司第七二二研究所 | Low-frequency-stage magnetic sensor background noise measuring method |
| CN104007371A (en) * | 2014-05-15 | 2014-08-27 | 深圳供电局有限公司 | Device and method for checking cable partial discharge signal |
| CN104360242A (en) * | 2014-10-01 | 2015-02-18 | 玉林市科邦技术服务有限公司 | System for online monitoring discharging failures of high-voltage switch cabinet |
| CN104483602A (en) * | 2014-11-28 | 2015-04-01 | 北京兴迪仪器有限责任公司 | Local discharge signal identification method and device |
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| CN105629144B (en) * | 2016-03-11 | 2018-12-04 | 华乘电气科技（上海）股份有限公司 | High-tension switch gear partial discharge diagnostic method and system based on fingerprint base |
| CN105629144A (en) * | 2016-03-11 | 2016-06-01 | 华乘电气科技（上海）股份有限公司 | High voltage switchgear partial discharge diagnosis method and system based on fingerprint database |
| CN106353648A (en) * | 2016-08-30 | 2017-01-25 | 浙江新图维电子科技有限公司 | Comprehensive partial discharge monitoring device and method |
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| CN109254227A (en) * | 2017-07-13 | 2019-01-22 | 全球能源互联网欧洲研究院 | Detection method, apparatus and system towards electric network state |
| CN107942206A (en) * | 2017-10-16 | 2018-04-20 | 国网河北能源技术服务有限公司 | A kind of GIS partial discharge on-Line Monitor Device and localization method |
| CN107942206B (en) * | 2017-10-16 | 2020-10-23 | 国网河北能源技术服务有限公司 | GIS partial discharge positioning method |
| CN108333482A (en) * | 2018-01-17 | 2018-07-27 | 南通尚力机电工程设备有限公司 | A kind of measurement method of GIS partial discharge pattern-recognition |
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| CN108646151A (en) * | 2018-05-10 | 2018-10-12 | 东南大学 | Cable discharge acoustic detector based on adaptive noise reduction |
| CN112130035A (en) * | 2020-09-11 | 2020-12-25 | 国网福建省电力有限公司检修分公司 | Insulator discharge sound wave and electromagnetic wave detection method and device based on unmanned aerial vehicle |
| CN112130035B (en) * | 2020-09-11 | 2024-04-16 | 国网福建省电力有限公司检修分公司 | Unmanned aerial vehicle-based insulator discharge sound wave and electromagnetic wave detection method and equipment |
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