CN102435424A - On-line monitoring system for high-voltage breaker based on vibration characteristics - Google Patents
On-line monitoring system for high-voltage breaker based on vibration characteristics Download PDFInfo
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- CN102435424A CN102435424A CN2011102600105A CN201110260010A CN102435424A CN 102435424 A CN102435424 A CN 102435424A CN 2011102600105 A CN2011102600105 A CN 2011102600105A CN 201110260010 A CN201110260010 A CN 201110260010A CN 102435424 A CN102435424 A CN 102435424A
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Abstract
The invention discloses an on-line monitoring system for a high-voltage breaker based on vibration characteristics. The on-line monitoring system comprises a vibration sensor arranged on a mechanical shell of a breaker, a signal processing circuit, a wireless data receiving and sending module, a vibration measuring plate and a lower computer, wherein the vibration sensor is used for collecting mechanical vibration response signals of a breaker switch; after the mechanical vibration response signals are subjected to signal pre-treatment by the signal processing circuit, short-range wireless receiving and sending can be performed by the wireless data receiving and sending module; the vibration measuring plate is used for collecting the wirelessly transmitted vibration signals and sending the signals to the lower computer; and the vibration signals are sequentially compared with a characteristic waveform 'fingerprint' at a moveably switching moment of the normal breaker stored in the lower computer, so as to judge whether the breaker is in mechanical fault. The on-line monitoring system has the advantages that the method is simple, the mounting and maintenance are convenient, and the sensor need not be placed in the breaker, and the like, so that the danger of mounting personnel is greatly reduced.
Description
Technical field
The present invention relates to applications such as power equipment, signal Processing, sensor network, especially a kind of primary cut-out on-line monitoring system based on vibration performance.
Background technology
Primary cut-out it not only can cut off or the closed high circuit in no-load current and load current; And the effect through relay protection when system breaks down; Cut off overload electric current and short-circuit current; It has quite perfect arc extinguishing structure and enough cutout abilities, can be divided into: oil-break (bulk oil circuit, oil-minimum breaker), sulfur hexafluoride breaker (SF6 isolating switch), vacuum circuit breaker, compressed-air circuit breaker etc.According to national standard, primary cut-out is meant that WV is higher than the isolating switch of 6KV.
The reliable in action property of isolating switch is directly connected to the safety and stablization of electric system.Twice world wide investigation and China that international conference on large HV electric systems is done the reliability of primary cut-out show all that to the high-voltage switch gear accident statistical analysis primary cut-out fault 80% is a mechanical fault, and most of faults are problems of operating mechanism.Inspection to the primary cut-out mechanical property mainly is to combine maintenance regularly to carry out preventive trial in equipment handing-over and outage both at home and abroad, changes parts, the mechanical property of checked operation mechanism.Practice shows that frequent operation and excessive field-strip can reduce the reliability of primary cut-out action.Therefore, isolating switch is implemented condition diagnosing or real time on-line monitoring, in time understand its operation conditions, grasp its operation characteristic and change and variation tendency, very important to improving its operational reliability.
Close switching time the traditional main monitoring breaker mechanically actuated of primary cut-out on-line monitoring method number of times, switch accumulated running time, contact, the switching winding loop, close, switching winding electric current, voltage; The moving contact of breaker stroke; Contact of breaker speed; Switching-in spring state etc.; This method monitoring method is simple, be prone to standardization, but has some problem and shortage, shows mainly that electromagnetic interference (EMI) is serious, sensor must be received isolating switch inside, security is relatively poor, self performance is unstable, dismounting is inconvenient, poor anti jamming capability, the data accuracy that records be not high.
In sum; Developing a kind of the need implants sensor isolating switch inside, reduces electromagnetic interference (EMI), reduces Personal Risk's isolating switch on-line monitoring system; For building intelligent grid; The fundamental policy of carrying out country's proposition " rebuilding traditional industry with new and high technology " and " through implementing energy-saving and emission-reduction, creating conservation-minded society " has important practical significance.
Summary of the invention
For overcome existing primary cut-out on-line monitoring system dangerous big, dismounting is constant, be not suitable for the extensive deficiency of implementing, the present invention provide a kind of do not need with sensor implant isolating switch inside, convenient disassembly, be fit to implement on a large scale, the good primary cut-out on-line monitoring system of real-time based on vibration performance.
The technical solution adopted for the present invention to solve the technical problems is:
A kind of primary cut-out on-line monitoring system based on vibration performance; Comprise that the vibration transducer, signal processing circuit, the wireless number that are positioned on the breaker mechanical shell adopt reception and sending module, vibration survey plate, next bit computer; Said vibration transducer is used for the mechanical vibration response signal of circuit-breaker switching on-off is gathered; After the process signal processing circuit is carried out Signal Pretreatment to said mechanical vibration response signal; Adopt through wireless number and to receive and sending module carries out the short-distance wireless transmitting-receiving; Next bit computer is gathered and given to vibration signal by the vibration survey plate is come to wireless transmission, compares with the moving signature waveform " fingerprint " that closes moment that is stored in the normal isolating switch in the next bit computer successively then, and whether there was a mechanical failure thereby judge isolating switch.
Described system, said two vibration transducers all glued joint and are positioned over breaker mechanical housing upside centermost socket cap two side positions respectively, and said two vibration transducer spacings are greater than 10 centimetres, less than 50 centimetres, said two vibration transducers series connection.Sensitivity not only can be improved, and the extraneous vibration effect of signals can be reduced.
Described system, said two vibrating sensing models are ULT2012
Described system; Compare with the moving signature waveform " fingerprint " that closes moment that is stored in the normal isolating switch in the next bit computer, if the goodness of fit greater than and equal 90%, judge that then primary cut-out is normal; If the goodness of fit, judges then that primary cut-out breaks down less than 90%.
Described system carries out in the process of Signal Pretreatment said mechanical vibration response signal, adopts the wavelet analysis algorithm in frequency field, signal to be analyzed, and the noise section of signal is removed, and extracts useful signal, realizes the de-noising of signal.
The inventive method is simple, realize easily, the vibratory response waveform of the mechanical hull through Measurement and analysis isolating switch branch, combined floodgate, and compare with isolating switch branch, the signature waveform of combined floodgate after new isolating switch or the overhaul, thus judged the mechanical fault of isolating switch.The present invention adopts easy mounting, sensitivity, reliable, piezoelectric vibration sensors that the linearity is good, adopts the vibration development platform of America NI company to realize the security measurement of isolating switch.It is simple that the present invention has method, install and easy to maintenance, need not sensor placed advantage such as isolating switch inside, greatly reduce installation personnel danger.
Description of drawings
Fig. 1 is the primary cut-out on-line monitoring system block diagram based on vibration performance
Fig. 2 is the waveform of the moment mechanical hull vibration signal that closes a floodgate
Fig. 3 is the waveform of separating brake moment mechanical hull vibration signal
Embodiment
Below in conjunction with specific embodiment, the present invention is elaborated.
Embodiment 1
With reference to figure 1; Primary cut-out on-line monitoring system based on vibration performance; Comprise that the vibration transducer, signal processing circuit, the wireless number that are positioned on the breaker mechanical shell adopt reception and sending module, vibration survey plate, next bit computer; The vibration transducer that employing is positioned on the breaker mechanical shell is monitored the mechanical vibration response signal of circuit-breaker switching on-off; Through after signal processing circuit carries out signal Processing, adopt through wireless number and to receive and sending module carries out the short-distance wireless transmitting-receiving, gather and give next bit computer by the vibration signal that the vibration survey plate is come to wireless transmission; Compare with the moving signature waveform " fingerprint " that closes moment that is stored in the normal isolating switch in the next bit computer successively then, whether there was a mechanical failure thereby judge isolating switch.
Branch/contacting controling circuit control circuit-breaker switching on-off, branchs/energization control signal is provided by supervisory control comuter, with zero point of branch/energization control signal be the initial moment of vibration transducer measurement branch/combined floodgate moment mechanical hull vibration signal.The software of supervisory control comuter regularly provides the branch/energization control signal of primary cut-out according to quality supervision personnel and maintenance personal's requirement; Timing can be set (isolating switch timing under rugged surroundings is set shorter) according to the external environment condition situation by operating personnel; Also can be by the needs change supervisory control comuter software arrangements of operating personnel according to operation of power networks; Send branch/energization control signal, carry out the monitoring of primary cut-out random state.
Vibration transducer adopts the piezoelectric type vibration transducer, is used to gather mechanical hull vibration signal, and the magnetic interference of this type sensor electrical is less, and is highly sensitive, and the survey frequency scope is big, and the linearity is good.Adopt the piezoelectric type oscillatory type sensor of the U.S. safe (QUATRONIX) company, model and performance are seen shown in the table 1:
Table 1
The vibration signal that vibration transducer records comprises many spikes and sudden change part, and noise neither be stably, therefore should carry out pre-service to signal, and the noise section of signal is removed, and extracts useful signal.Native system adopts wavelet analysis to carry out signal Processing, and this disposal route can be analyzed signal in frequency field simultaneously, can distinguish sudden change part and noise in the signal effectively, thereby realizes the de-noising of signal.
Vibration signal after wavelet method is handled adopts reception through wireless number and sending module carries out the short-distance wireless transmitting-receiving; The model that wireless number is adopted reception and sending module employing America NI company is a NI WLS-9205 module, and this module has: the wireless and ethernet interface of IEEE802.11g (Wi-Fi); 32 tunnel single-ended or 16 road difference analogues inputs; 16 bit resolutions; The total sampling rate of 250kS/s; ± 200mV, ± 1V, ± 5V and ± 10V input range able to programme; 128 AES data encryptions and IEEE 802.11i (WPA2) support the high security guaranteed.
Next bit computer is gathered and given to the vibration signal that the vibration survey plate of employing America NI company is come to wireless transmission.The model of vibration survey plate is: 779696-35, and this vibration survey plate has following function: 5000 synchronizing channels that are used for vibrating data collection; 204.8kS/s sampling rate (AI) and the turnover rate (AO) of 204.8kS/s; 24 ADC of 118dB dynamic range and DAC; Support LABVIEW programming and INTERNET upload function;
Adopt the LABVIEW software and sub-software vibratory tool bag the developing software thereof of America NI company as Surveillance center's computing machine and next bit computer; This software has information analysis, information stores, vibration survey, mark octave analysis, sine sweep analysis, sound level measurement, frequency analysis, frequency response measurement and transient analysis; Waterfall shows, chromatic graph shows, octave illustrates and value/phase place shows; Wavelet analysis, functions such as data upload.
The singularity index of the vibration signal envelope crest that produces when the dynamic/static contact during with normal operation of circuit breaker contacts carries out record, as normal fingerprint, when next bit computer is diagnosed at every turn; Every separated 1ms gets 1 point on the vibration signal that records; Calculate its amplitude, get 200 points altogether, obtain 200 points in ground with normal fingerprint ripple by above-mentioned rule respectively and compare; If the goodness of fit greater than and equal 90%; Judge that then primary cut-out is normal, if the goodness of fit, judges then that primary cut-out breaks down less than 90%.
Next bit computer arrives Surveillance center through Internet with the measurement situation teletransmission of each isolating switch, and Surveillance center has database storing, printing, warning, storage, Presentation Function.
Embodiment 2
Be illustrated in figure 2 as one of moving signature waveform " fingerprint " that closes moment of normal isolating switch; Be the primary cut-out combined floodgate fingerprint waveform basic structure of moment; But breaker closing its fingerprint waveform of moment of different model is different on details; Main difference point is on its amplitude, and breaker closing its fingerprint waveform of moment of different model is stored in the database of slave computer LABVIEW software.Like pairing important impact shock among Fig. 2 as follows constantly:
T1: closing contactor moves pairing weak vibration (contactor on-off time) on the support;
T2: combined floodgate iron core lead agency kinematic link setting in motion (the contact system setting in motion constantly);
T3: dynamic/static contact time of contact (main contact time of contact);
T4: the combined floodgate impact damper inserts constantly;
T5: the combined floodgate iron core moves to the end, maximum one-shot in corresponding the support making process;
T6: the link motion of mechanism to the end with keep combined floodgate pallet contact impact.
Each motion state of impacting wavelet and isolating switch has relation one to one in operating process, and this provides significant data for isolating switch on-line monitoring and fault distinguishing.
The fingerprint waveform of separating brake moment is as shown in Figure 3, for the sub-switching operation process, important impact shock as follows constantly:
T1: separating brake release electromagnet and linkage assembly bump, corresponding fainter vibration;
T2: mechanism rod off-the-line, tripping spring begin the motion of drive transmission device and contact system, maximum impact shock in corresponding the separating brake process.
T3: main contact separates constantly;
T4: moving contact moves to the end, and the pairing impact of braking buffering also is a stronger vibration signal.
Should be understood that, concerning those of ordinary skills, can improve or conversion, and all these improvement and conversion all should belong to the protection domain of accompanying claims of the present invention according to above-mentioned explanation.
Claims (5)
1. primary cut-out on-line monitoring system based on vibration performance; It is characterized in that: comprise that the vibration transducer, signal processing circuit, the wireless number that are positioned on the breaker mechanical shell adopt reception and sending module, vibration survey plate, next bit computer; Said vibration transducer is used for the mechanical vibration response signal of circuit-breaker switching on-off is gathered; After the process signal processing circuit is carried out Signal Pretreatment to said mechanical vibration response signal; Adopt through wireless number and to receive and sending module carries out the short-distance wireless transmitting-receiving; Next bit computer is gathered and given to vibration signal by the vibration survey plate is come to wireless transmission, compares with the moving signature waveform " fingerprint " that closes moment that is stored in the normal isolating switch in the next bit computer successively then, and whether there was a mechanical failure thereby judge isolating switch.
2. system according to claim 1; It is characterized in that said two vibration transducers all glued joint and are positioned over breaker mechanical housing upside centermost socket cap two side positions respectively, said two vibration transducer spacings are greater than 10 centimetres; Less than 50 centimetres, said two vibration transducers series connection.
3. system according to claim 1 is characterized in that, said two vibrating sensing models are ULT2012.
4. system according to claim 1; It is characterized in that; Compare with the moving signature waveform " fingerprint " that closes moment that is stored in the normal isolating switch in the next bit computer, if the goodness of fit greater than and equal 90%, judge that then primary cut-out is normal; If the goodness of fit, judges then that primary cut-out breaks down less than 90%.
5. system according to claim 1 is characterized in that, said mechanical vibration response signal is carried out in the process of Signal Pretreatment; Adopt the wavelet analysis algorithm in frequency field, signal to be analyzed; The noise section of signal is removed, extracted useful signal, realize the de-noising of signal.
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Cited By (21)
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|---|---|---|---|---|
| CN102928069A (en) * | 2012-10-08 | 2013-02-13 | 西安交通大学 | System and method for detecting vibration of high-voltage circuit breaker |
| CN103076168A (en) * | 2013-01-09 | 2013-05-01 | 西安交通大学 | Diagnosis method for mechanical faults of circuit breaker |
| CN103412258A (en) * | 2013-08-23 | 2013-11-27 | 国家电网公司 | Breaker switch-on-off gate spring ultrasound monitoring device and method |
| CN103616635A (en) * | 2013-12-05 | 2014-03-05 | 国家电网公司 | Method and device for diagnosing mechanical characteristic failures of high-voltage circuit-breaker |
| CN103743554A (en) * | 2013-06-28 | 2014-04-23 | 国家电网公司 | High-voltage circuit breaker mechanical failure diagnosis method based on vibration signal analysis |
| CN103743468A (en) * | 2013-12-31 | 2014-04-23 | 国家电网公司 | Vibration sensing device for circuit breaker failure |
| CN103776622A (en) * | 2014-01-08 | 2014-05-07 | 江苏省电力公司检修分公司 | High voltage circuit breaker mechanical fault rapid diagnosis system |
| CN104062111A (en) * | 2014-06-13 | 2014-09-24 | 云南电力试验研究院（集团）有限公司电力研究院 | Method for collecting mechanical characteristic parameters of breaker based on high-speed camera |
| CN104597397A (en) * | 2015-01-13 | 2015-05-06 | 国家电网公司 | Method and system for diagnosing fault type of breaker |
| CN105241643A (en) * | 2015-09-19 | 2016-01-13 | 东北电力大学 | High-voltage circuit breaker mechanical state monitoring method employing HS transformation and single-type support vector machine |
| CN105548873A (en) * | 2015-12-09 | 2016-05-04 | 中国西电电气股份有限公司 | Method and system for achieving health diagnosis of switchgear in online monitoring device |
| WO2016206056A1 (en) * | 2015-06-25 | 2016-12-29 | 国家电网公司 | Circuit breaker detection method, device and system |
| CN106706294A (en) * | 2016-12-30 | 2017-05-24 | 航天科工深圳（集团）有限公司 | Acoustic fingerprint-based monitoring system and monitoring method for monitoring machine condition of switchgear |
| CN106707151A (en) * | 2016-12-15 | 2017-05-24 | 中国南方电网有限责任公司超高压输电公司贵阳局 | High-voltage breaker online monitoring system |
| CN107976684A (en) * | 2016-10-25 | 2018-05-01 | Abb瑞士股份有限公司 | System and method for observation circuit breaker |
| CN108983085A (en) * | 2018-08-27 | 2018-12-11 | 国网河南省电力公司电力科学研究院 | A kind of circuit breaker electric magnetostatic wave signal three-phase acquisition device and three-phase separation method |
| CN109100641A (en) * | 2017-06-20 | 2018-12-28 | 平高集团有限公司 | A kind of high voltage isolator fault detection method and device |
| CN109613423A (en) * | 2018-12-19 | 2019-04-12 | 同济大学 | High-voltage circuitbreaker on-line monitoring and trouble analysis system based on vibration signal |
| CN110426192A (en) * | 2019-08-14 | 2019-11-08 | 南方电网科学研究院有限责任公司 | A kind of the acoustic fingerprints detection system and method for breaker |
| CN111289892A (en) * | 2020-04-07 | 2020-06-16 | 南京机电职业技术学院 | High-voltage circuit breaker fault diagnosis method based on PCA-SVM |
| CN114112017A (en) * | 2021-11-25 | 2022-03-01 | 国网安徽省电力有限公司电力科学研究院 | Vibration signal extraction method and system of GIS isolating switch |
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| CN102928069A (en) * | 2012-10-08 | 2013-02-13 | 西安交通大学 | System and method for detecting vibration of high-voltage circuit breaker |
| CN102928069B (en) * | 2012-10-08 | 2014-11-05 | 西安交通大学 | System and method for detecting vibration of high-voltage circuit breaker |
| CN103076168A (en) * | 2013-01-09 | 2013-05-01 | 西安交通大学 | Diagnosis method for mechanical faults of circuit breaker |
| CN103743554A (en) * | 2013-06-28 | 2014-04-23 | 国家电网公司 | High-voltage circuit breaker mechanical failure diagnosis method based on vibration signal analysis |
| CN103743554B (en) * | 2013-06-28 | 2017-03-29 | 国家电网公司 | A kind of Mechanical Failure of HV Circuit Breaker diagnostic method based on analysis of vibration signal |
| CN103412258B (en) * | 2013-08-23 | 2015-06-17 | 国家电网公司 | Breaker switch-on-off gate spring ultrasound monitoring device and method |
| CN103412258A (en) * | 2013-08-23 | 2013-11-27 | 国家电网公司 | Breaker switch-on-off gate spring ultrasound monitoring device and method |
| CN103616635A (en) * | 2013-12-05 | 2014-03-05 | 国家电网公司 | Method and device for diagnosing mechanical characteristic failures of high-voltage circuit-breaker |
| CN103616635B (en) * | 2013-12-05 | 2017-02-08 | 国家电网公司 | Method and device for diagnosing mechanical characteristic failures of high-voltage circuit-breaker |
| CN103743468A (en) * | 2013-12-31 | 2014-04-23 | 国家电网公司 | Vibration sensing device for circuit breaker failure |
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| CN104062111A (en) * | 2014-06-13 | 2014-09-24 | 云南电力试验研究院（集团）有限公司电力研究院 | Method for collecting mechanical characteristic parameters of breaker based on high-speed camera |
| CN104597397B (en) * | 2015-01-13 | 2017-10-03 | 国家电网公司 | The fault type diagnostic method and system of breaker |
| CN104597397A (en) * | 2015-01-13 | 2015-05-06 | 国家电网公司 | Method and system for diagnosing fault type of breaker |
| WO2016206056A1 (en) * | 2015-06-25 | 2016-12-29 | 国家电网公司 | Circuit breaker detection method, device and system |
| CN105241643B (en) * | 2015-09-19 | 2017-08-08 | 东北电力大学 | Mechanical state of high-voltage circuit breaker monitoring method with one-class support vector machines is converted using HS |
| CN105241643A (en) * | 2015-09-19 | 2016-01-13 | 东北电力大学 | High-voltage circuit breaker mechanical state monitoring method employing HS transformation and single-type support vector machine |
| CN105548873A (en) * | 2015-12-09 | 2016-05-04 | 中国西电电气股份有限公司 | Method and system for achieving health diagnosis of switchgear in online monitoring device |
| CN107976684B (en) * | 2016-10-25 | 2023-08-04 | 日立能源瑞士股份公司 | System and method for monitoring circuit breaker |
| CN107976684A (en) * | 2016-10-25 | 2018-05-01 | Abb瑞士股份有限公司 | System and method for observation circuit breaker |
| CN106707151A (en) * | 2016-12-15 | 2017-05-24 | 中国南方电网有限责任公司超高压输电公司贵阳局 | High-voltage breaker online monitoring system |
| CN106706294A (en) * | 2016-12-30 | 2017-05-24 | 航天科工深圳（集团）有限公司 | Acoustic fingerprint-based monitoring system and monitoring method for monitoring machine condition of switchgear |
| CN109100641A (en) * | 2017-06-20 | 2018-12-28 | 平高集团有限公司 | A kind of high voltage isolator fault detection method and device |
| CN108983085A (en) * | 2018-08-27 | 2018-12-11 | 国网河南省电力公司电力科学研究院 | A kind of circuit breaker electric magnetostatic wave signal three-phase acquisition device and three-phase separation method |
| CN109613423A (en) * | 2018-12-19 | 2019-04-12 | 同济大学 | High-voltage circuitbreaker on-line monitoring and trouble analysis system based on vibration signal |
| CN110426192A (en) * | 2019-08-14 | 2019-11-08 | 南方电网科学研究院有限责任公司 | A kind of the acoustic fingerprints detection system and method for breaker |
| CN111289892A (en) * | 2020-04-07 | 2020-06-16 | 南京机电职业技术学院 | High-voltage circuit breaker fault diagnosis method based on PCA-SVM |
| CN111289892B (en) * | 2020-04-07 | 2022-07-01 | 南京机电职业技术学院 | High-voltage circuit breaker fault diagnosis method based on PCA-SVM |
| CN114112017A (en) * | 2021-11-25 | 2022-03-01 | 国网安徽省电力有限公司电力科学研究院 | Vibration signal extraction method and system of GIS isolating switch |
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Application publication date: 20120502 |