CN102650654A - Operation performance on-line assessment method for power transformer iron core and clamping piece grounding current monitoring device - Google Patents
Operation performance on-line assessment method for power transformer iron core and clamping piece grounding current monitoring device Download PDFInfo
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- CN102650654A CN102650654A CN2012101486319A CN201210148631A CN102650654A CN 102650654 A CN102650654 A CN 102650654A CN 2012101486319 A CN2012101486319 A CN 2012101486319A CN 201210148631 A CN201210148631 A CN 201210148631A CN 102650654 A CN102650654 A CN 102650654A
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Abstract
The invention discloses an operation performance on-line assessment method for a power transformer iron core and a clamping piece grounding current monitoring device. According to the invention, the assessment of an electromagnetic coupling sensor is separated from that of a follow-up signal cable, a hardware system, an optical fiber transmission system and a software display and analysis system; and based on an openable electromagnetic coupling sensor, which is checked and in the effective check period, and an oscilloscope with the bandwidth no less than 100 MHz, and through comparison and analysis of directly monitored wave shapes of the sensor as well as comparison and analysis of directly monitored wave shapes of the signal processing and displaying system and other systems except for the sensor of the monitoring device, the operation performance on-line assessment of the monitoring device can be realized. Based on the characteristics of the monitoring device in an operating site, the invention provides the on-line assessment method which can realize assessment of all pieces through the manner of separating the sensor from a follow-up system, and has the remarkable advantages of strong field operability, convenience, accuracy, reliability, no influence on operation of electric equipment, and the like.
Description
Technical field
The invention belongs to electric system electric equipment operation state-detection, monitoring device category, be particularly useful for electrical transformer cores, clamp earthing current monitoring device runnability assessment method technical field.
Background technology
There is electric field in transformer around its winding when normal operation, because hardwares such as iron core, folder, mailbox residing position in this electric field is different, produce potential difference (PD) each other, causes discharge.Therefore, the necessary reliable ground of hardwares such as transformer core, folder, and one point earth can only be arranged.If another ground connection appears in iron core or folder for a certain reason, then form the closed-loop path, because there is magnetic flux to pass this closed-loop path, just has circulation on the ground wire and occur, iron core or multipoint earthing of clamping piece fault promptly take place.Can outside transformer core, draw on the ground lead of grounding sleeve with whether there being electric current to realize judging on the clamp on amperemeter measuring lead wire.
Current transformer important or core site is understood more installation iron core, clamp earthing current on-Line Monitor Device.For the monitoring system of the type on-line operation itself, how to carry out the runnability evaluation and test, or even the evaluation and test under the online situation, there are not means effectively and reasonably at present.Based on the wide range scope (several mA levels to A levels up to a hundred) of transformer core, clamp earthing current, the evaluation and test that its EM coupling sensor performance need rationalize; And the on-the-spot abominable electromagnetic interference (EMI) of operation also can impact the hardware handles and the signal transmission system of total system; Software for system shows and analytic system each item function, needs more full and accurate test.Each parts laboratory test and appraisal of relevant this system, the evaluation and test under system's installing and the scene, and the evaluation and test of system after the operation some time all need certain technological means and embodiment.
Comprehensive above-mentioned situation; A kind of electrical transformer cores, the online assessment method of clamp earthing current monitoring device runnability are proposed; And the technology of giving realizes, this method can cover that breadboard system unit test is tested with entire system, the on-line testing of operational system etc.
Summary of the invention
For solving the test and appraisal of electrical transformer cores, clamp earthing current monitoring device; Guarantee the reliable, stable of monitoring system; Based on the mode that sensor is separated with follow-up system; The oscillograph through but the folding EM coupling sensor warp check, in effective check phase and bandwidth are not less than 100MHz directly utilizes the waveform compare of analysis, realizes the online test and appraisal to electrical transformer cores, clamp earthing current monitoring device.
The present invention realizes through following technical proposal.
A kind of electrical transformer cores, the online assessment method of clamp earthing current monitoring device runnability, characteristic of the present invention is:
(1) test and appraisal of EM coupling sensor and the test and appraisal of follow-up signal cable, hardware system, fibre-optic transmission system (FOTS), software demonstration and analytic system are separated; But, realize the online test and appraisal of monitoring device runnability based on the oscillograph that is not less than 100MHz through folding EM coupling sensor that check, in effective check phase and bandwidth;
(2) but will be through online being installed on transformer core, the folder down conductor of folding EM coupling sensor that check, in effective check phase; Be not less than the oscillograph of 100MHz through bandwidth; Adopt the signal cable of equal in length; But the monitoring waveform of the EM coupling sensor of measurement monitoring device and the folding EM coupling sensor of online installing is compared through phase place, amplitude, registration to two waveforms, realizes the online test and appraisal of EM coupling sensor to monitoring device;
(3) but be installed in range with two on 1mA～500A, the power current source lead-in wire that can regulate continuously through same model folding EM coupling sensor that check, in effective check phase; One links to each other with the follow-up signal cable of monitoring device; Carry out current monitoring by its hardware system, fibre-optic transmission system (FOTS), software demonstration and analytic system; An oscillograph that is not less than 100MHz through signal cable and bandwidth links to each other, and carries out current monitoring; Amplitude, phase place, waveform registration to two groups of current monitoring data are compared, and realize all the other systems online test and appraisal of monitoring device except that the EM coupling sensor.
Further set forth content of the present invention below in conjunction with accompanying drawing and instance.
Description of drawings
Fig. 1 is electrical transformer cores, clamp earthing current monitoring device synoptic diagram;
Fig. 2 is the online test and appraisal synoptic diagram of the EM coupling sensor of iron core, clamp earthing current monitoring device;
Fig. 3 is the online test and appraisal synoptic diagram of signal transmission, processing, demonstration and the analytic system of iron core, clamp earthing current monitoring device.
Among the figure: 1, transformer; 2, iron core grounding extraction tube; 3, folder ground connection extraction tube; 4, supporting insulator; 5, down conductor; 6, EM coupling sensor; 7, signal cable; 8, hardware handles system; 9, fibre-optic transmission system (FOTS); 10, software shows and analytic system; 11, earth point; But 12, through folding EM coupling sensor that check, in effective check phase; 13, oscillograph; 14, range is in 1mA～500A, the power current source that can regulate continuously; 15, power current source lead-in wire.
Embodiment
A kind of electrical transformer cores, the online assessment method of clamp earthing current monitoring device runnability, characteristic of the present invention is:
(1) test and appraisal of EM coupling sensor and the test and appraisal of follow-up signal cable, hardware system, fibre-optic transmission system (FOTS), software demonstration and analytic system are separated; But, realize the online test and appraisal of monitoring device runnability based on the oscillograph that is not less than 100MHz through folding EM coupling sensor that check, in effective check phase and bandwidth.
(2) but will be through online being installed on transformer core, the folder down conductor of folding EM coupling sensor that check, in effective check phase; Be not less than the oscillograph of 100MHz through bandwidth; Adopt the signal cable of equal in length; But the monitoring waveform of the EM coupling sensor of measurement monitoring device and the folding EM coupling sensor of online installing is compared through phase place, amplitude, registration to two waveforms, realizes the online test and appraisal of EM coupling sensor to monitoring device.
(3) but be installed in range with two on 1mA～500A, the power current source lead-in wire that can regulate continuously through same model folding EM coupling sensor that check, in effective check phase; One links to each other with the follow-up signal cable of monitoring device; Carry out current monitoring by its hardware system, fibre-optic transmission system (FOTS), software demonstration and analytic system; An oscillograph that is not less than 100MHz through signal cable and bandwidth links to each other, and carries out current monitoring; Amplitude, phase place, waveform registration to two groups of current monitoring data are compared, and realize all the other systems online test and appraisal of monitoring device except that the EM coupling sensor.
See Fig. 1, the figure shows electrical transformer cores, clamp earthing current monitoring device synoptic diagram.1 is power transformer among the figure, and the ground connection of iron core and folder is through iron core grounding extraction tube 2, folder ground connection extraction tube 3, and the down conductor 5 through supporting insulator 4 supports is connected to earth point 11.6 is the EM coupling sensor of transformer core, clamp earthing current monitoring device; Through signal cable 7; Detection signal is transferred to on-the-spot hardware handles system 8 nearby; Signal is after the electric light conversion, and through fibre-optic transmission system (FOTS) 9, the software that detection signal is transferred to the monitoring backstage shows and analytic system.
See Fig. 2, the figure shows the online test and appraisal synoptic diagram of EM coupling sensor of iron core, clamp earthing current monitoring device.The EM coupling sensor 6 of monitoring device separates with follow-up signal transmission, processing, demonstration and analytic system among the figure.But will be through folding EM coupling sensor 12 online being installed on transformer core, the folder down conductor 5 that check, in effective check phase.Sensor 6 directly links to each other with oscillograph 13 through signal cable 7 with 12.Through the monitoring waveform of oscillograph 13, utilize the test and appraisal of comparing of 12 pairs of sensors 6 of sensor.
See Fig. 3, the figure shows the online test and appraisal synoptic diagram of signal transmission, processing, demonstration and analytic system of iron core, clamp earthing current monitoring device.But will link to each other with signal cable 7 through folding EM coupling sensor 12 that check, in effective check phase among the figure, and make monitoring device normally to move.14 for range in 1mA～500A, the power current source that can regulate continuously, 15 penetrate sensor 12 through going between, make the waveform monitoring of oscillograph 13 and the software demonstration and the analytic system 10 of monitoring device can record current signal.Waveform monitoring through oscillograph 13 is carried out integral body comparison test and appraisal to signal cable 7, hardware handles system 8, fibre-optic transmission system (FOTS) 9, software demonstration and the analytic system 10 of monitoring device.
Claims (1)
1. an electrical transformer cores, the online assessment method of clamp earthing current monitoring device runnability is characterized in that:
(1) test and appraisal of EM coupling sensor and the test and appraisal of follow-up signal cable, hardware system, fibre-optic transmission system (FOTS), software demonstration and analytic system are separated; But, realize the online test and appraisal of monitoring device runnability based on the oscillograph that is not less than 100MHz through folding EM coupling sensor that check, in effective check phase and bandwidth;
(2) but will be through online being installed on transformer core, the folder down conductor of folding EM coupling sensor that check, in effective check phase; Be not less than the oscillograph of 100MHz through bandwidth; Adopt the signal cable of equal in length; But the monitoring waveform of the EM coupling sensor of measurement monitoring device and the folding EM coupling sensor of online installing is compared through phase place, amplitude, registration to two waveforms, realizes the online test and appraisal of EM coupling sensor to monitoring device;
(3) but be installed in range with two on 1mA～500A, the power current source lead-in wire that can regulate continuously through same model folding EM coupling sensor that check, in effective check phase; One links to each other with the follow-up signal cable of monitoring device; Carry out current monitoring by its hardware system, fibre-optic transmission system (FOTS), software demonstration and analytic system; An oscillograph that is not less than 100MHz through signal cable and bandwidth links to each other, and carries out current monitoring; Amplitude, phase place, waveform registration to two groups of current monitoring data are compared, and realize all the other systems online test and appraisal of monitoring device except that the EM coupling sensor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012101486319A CN102650654A (en) | 2012-05-14 | 2012-05-14 | Operation performance on-line assessment method for power transformer iron core and clamping piece grounding current monitoring device |
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| CN2012101486319A CN102650654A (en) | 2012-05-14 | 2012-05-14 | Operation performance on-line assessment method for power transformer iron core and clamping piece grounding current monitoring device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103558450A (en) * | 2013-11-02 | 2014-02-05 | 国家电网公司 | On-line monitoring device of three mutual inductors of grounding current of clamp of transformer |
| CN103560484A (en) * | 2013-11-02 | 2014-02-05 | 国家电网公司 | Multipoint ground-connection current control device for three current transformers to monitor transformer clamping parts in online mode |
| CN103558449A (en) * | 2013-11-02 | 2014-02-05 | 国家电网公司 | On-line monitoring device of double mutual inductors of grounding current of clamp of transformer |
| CN105223457A (en) * | 2014-05-29 | 2016-01-06 | 国网山西省电力公司电力科学研究院 | The device and method that extra-high voltage reactor earth fault judges and processes, eliminates |
| CN110568305A (en) * | 2019-09-27 | 2019-12-13 | 上海锐开电气有限公司 | Iron core and clamp grounding current monitoring device for extra-high voltage converter transformer |
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| CN101038306A (en) * | 2007-04-24 | 2007-09-19 | 华北电力大学 | Device for online monitoring and overcurrent limiting power transformer iron core grounding current |
| CN201247294Y (en) * | 2008-08-15 | 2009-05-27 | 上海致达智利达系统控制有限责任公司 | Synthesis on-line automatization monitoring system for transformer substation |
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| CN102419410A (en) * | 2011-08-19 | 2012-04-18 | 云南电力试验研究院(集团)有限公司 | Voltage/current double-applying testing device for electric device |
| CN102435922A (en) * | 2011-10-26 | 2012-05-02 | 上海交通大学 | Acoustic-electric combined detection system and positioning method for GIS (Gas Insulated Switchgear) local discharge |
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| CN87204152U (en) * | 1987-04-23 | 1987-12-30 | 杨继保 | Double-current transducer type earthometer for winding inside slot of core |
| CN1605879A (en) * | 2003-10-11 | 2005-04-13 | 欧阳南尼 | Testing method for on-line monitoring internal insulation incipient fault of electric equipment |
| CN2844932Y (en) * | 2005-11-07 | 2006-12-06 | 珠海泰坦科技股份有限公司 | System for monitoring external insulation of transformer |
| CN101038306A (en) * | 2007-04-24 | 2007-09-19 | 华北电力大学 | Device for online monitoring and overcurrent limiting power transformer iron core grounding current |
| CN101452035A (en) * | 2007-12-04 | 2009-06-10 | 肖秋贵 | Electric appliance earthing status monitoring circuit |
| CN101561472A (en) * | 2008-04-18 | 2009-10-21 | 日本电力电线电缆株式会社 | Detection method for local discharge |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103558450A (en) * | 2013-11-02 | 2014-02-05 | 国家电网公司 | On-line monitoring device of three mutual inductors of grounding current of clamp of transformer |
| CN103560484A (en) * | 2013-11-02 | 2014-02-05 | 国家电网公司 | Multipoint ground-connection current control device for three current transformers to monitor transformer clamping parts in online mode |
| CN103558449A (en) * | 2013-11-02 | 2014-02-05 | 国家电网公司 | On-line monitoring device of double mutual inductors of grounding current of clamp of transformer |
| CN103560484B (en) * | 2013-11-02 | 2015-11-25 | 国家电网公司 | Three current transformer on-line monitoring multipoint earthing of clamping piece of transformer current control devices |
| CN103558450B (en) * | 2013-11-02 | 2015-11-25 | 国家电网公司 | Three mutual inductor on-Line Monitor Device of apparatus for fixing transformer ground current |
| CN103558449B (en) * | 2013-11-02 | 2016-01-20 | 国家电网公司 | Two mutual inductor on-Line Monitor Device of apparatus for fixing transformer ground current |
| CN105223457A (en) * | 2014-05-29 | 2016-01-06 | 国网山西省电力公司电力科学研究院 | The device and method that extra-high voltage reactor earth fault judges and processes, eliminates |
| CN110568305A (en) * | 2019-09-27 | 2019-12-13 | 上海锐开电气有限公司 | Iron core and clamp grounding current monitoring device for extra-high voltage converter transformer |
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Application publication date: 20120829 |