CN103776622A - High voltage circuit breaker mechanical fault rapid diagnosis system - Google Patents
High voltage circuit breaker mechanical fault rapid diagnosis system Download PDFInfo
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- CN103776622A CN103776622A CN201410007890.9A CN201410007890A CN103776622A CN 103776622 A CN103776622 A CN 103776622A CN 201410007890 A CN201410007890 A CN 201410007890A CN 103776622 A CN103776622 A CN 103776622A
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Abstract
The invention discloses a high voltage circuit breaker mechanical fault rapid diagnosis system which comprises a vibration sensor (1), a signal processing circuit (2), a data acquisition card (3) and a computer (4). The vibration sensor (1) is fixedly arranged on a beam (6) of a high voltage circuit breaker, and is connected with the signal processing circuit (2) through a signal line. The output of the signal processing circuit (2) is connected with the data acquisition card (3). An input channel of the data acquisition card (3) is in signal connection with closing and opening positions in a circuit breaker mechanism box. The data acquisition card (3) is connected with the computer (4) through a communication bus (9). The high voltage circuit breaker mechanical fault rapid diagnosis system can carry out fault diagnosis by automatically recording a closing vibration signal and an opening vibration signal, and can evaluate the state and the work performance of the high voltage circuit breaker in real time, so as to ensure safe and reliable work of the high voltage circuit breaker.
Description
Technical field
The present invention relates to a kind of mechanical fault diagnosis of isolating switch, be specifically related to a kind of Mechanical Failure of HV Circuit Breaker rapid diagnosis system.
Background technology
Primary cut-out is equipment important in electric system, there are the abnormal conditions such as short circuit during when electric system, the mechanical fault such as Ju Dong ﹑ Wu Dong ﹑ slow motion and three-phase asynchrony of isolating switch all may cause serious accident, even can cause equipment explosion, bring massive losses to the people's life and national wealth.Along with the raising of operation of power networks automaticity and reliability requirement, the reliability of primary cut-out is had higher requirement.Therefore the fault of the emerged in operation to primary cut-out is diagnosed timely and is seemed very important, and the diagnosis research that carries out Mechanical Failure of HV Circuit Breaker has huge economic and social benefit.
The planned preventive reqair blindness carried out is at present large, time-consuming, effort, also can bring a lot of non-essential shut-downs, and operation and excessive field-strip can reduce the reliability of isolating switch frequently.Therefore, how the duty of isolating switch is effectively monitored, find in time the fault of isolating switch, defectiveness position is processed in advance, avoid circuit breaker failure malignant development, prevent the generation of the serious accidents such as isolating switch blast, have very important meaning for the safe and reliable operation that ensures electrical network.Along with improving constantly that electric system requires economy, scheduled overhaul can not adapt to on-the-spot demand, and monitoring with fault diagnosis to primary cut-out machine performance has been trend of the times.
Summary of the invention
The present invention is directed in primary cut-out operation and maintenance, exist blindness large, waste time and energy, the problem such as the interruption maintenance time is long, a kind of on-line monitoring and Diagnosis system of mechanical failure that is applicable to primary cut-out is provided, can judge quickly and easily the state of primary cut-out, guarantee primary cut-out long-term safety reliably working.
Technical solution of the present invention is:
A kind of Mechanical Failure of HV Circuit Breaker rapid diagnosis system, involving vibrations sensor (1), signal processing circuit (2), data collecting card (3), computing machine (4).
Signal processing circuit (2) comprises constant current source (2.1) and signal amplifier (2.2), and data collecting card comprises A/D module (3.1) and I/O module (3.2); Vibration transducer (1) is fixedly mounted on the crossbeam (6) of primary cut-out (5), vibration transducer (1), constant current source (2.1) and signal amplifier (2.2) are connected successively, signal amplifier (2.2) output terminal is connected with A/D module (3.1) input end, and the input end of I/O module (3.2) is connected with sub-gate position make and break contact with closing position in circuit breaker mechanism case; Data collecting card (3) is connected with computing machine (4) by communication bus (9).
The Mechanical Failure of HV Circuit Breaker diagnostic procedure of Mechanical Failure of HV Circuit Breaker rapid diagnosis system comprises the following steps:
Step S01, constant current source (2.1) provides vibration transducer (1) working current, and obtain the voltage signal relevant to tested vibratory output by working current, voltage signal is the vibration signal of vibration transducer (1), voltage signal is sent into signal amplifier (2.2) and is amplified, and the voltage signal after amplification is delivered to the A/D module (3.1) of data collecting card (3), and voltage signal is converted to digital signal, be that vibration signal is changed for digital signal, digital signal is sent to computing machine;
Step S02, the signal of closing position (8.1) and sub-gate position (8.1) make and break contact in I/O module (3.2) monitoring breaker mechanism case, and closing position (8.1) and sub-gate position (8.2) switching node signal are sent to computing machine;
Step S03, computing machine (4) receives after the vibration signal and step S02 closing position (8.1) and sub-gate position (8.2) make and break contact signal of step S01, the digital signal of computing machine (4) comparison step S01 and the default threshold value of making an uproar of filtering, and the closing position of determining step S02 (8.1) and sub-gate position (8.2) make and break contact signal, analyzing and diagnosing Mechanical Failure of HV Circuit Breaker.
Step S03 specifically comprises the following steps:
1) computing machine (4) on-line monitoring Circuit breaker vibration signal, Circuit breaker vibration signal and the default threshold value of making an uproar of filtering are compared, if be more than or equal to the default threshold value of making an uproar of filtering, enter step 2), determine whether making process, otherwise continue the output signal of monitoring A/D module (3.1);
2) if the sub-gate position switch closure of primary cut-out (5) and closing position switch opens, judge that this process is making process, after record one combination lock vibration signal, carry out "on" position threshold decision, if Circuit breaker vibration signal is less than "on" position threshold value, complete combined floodgate vibration signal record, and return to step 1) continue monitoring breaker vibration signal, otherwise continue to record combined floodgate vibration signal;
3) if the closing position switch closure of primary cut-out (5) and sub-gate position switch opens, judge that this process is separating brake process, record separating brake vibration signal, after recording a component lock vibration signal, carry out gate-dividing state threshold decision, if the vibration signal of surveying is less than gate-dividing state threshold value, complete separating brake vibration signal record, and return to step 1) continuation monitoring breaker vibration signal, otherwise continue to record separating brake vibration signal.
Step S03 computer acquisition is after the vibration signal and step S02 closing position (8.1) and sub-gate position (8.2) make and break contact signal of step S01, computing machine (4) also comprises the signal processing collecting: the envelope spectrum that extracts vibration signal, extract vibration signal frequency spectrum based on envelope spectrum, vibration signal frequency spectrum and the data in the circuit breaker failure feature database of setting up are in advance compared, realize fault diagnosis.
Described knowledge base process of establishing comprises: the vibration signal frequency spectrum that the isolating switch of normal condition and malfunction is extracted is compared, the mechanical fault that stoppage circuit breaker is likely occurred is compared one by one, sets up thus the knowledge base that vibration signal frequency spectrum is corresponding with Mechanical Failure of HV Circuit Breaker.
Compared with prior art, beneficial effect of the present invention is: the present invention's application divide-shut brake vibration signal diagnosis Mechanical Failure of HV Circuit Breaker, state to primary cut-out and serviceability are assessed in real time, thereby guarantee the safe and reliable work of primary cut-out, this system can solve periodic monitoring that existing primary cut-out takes and the deficiency of diagnostic method, reduce unnecessary loss, guarantee the reliability and stability of primary cut-out in electric system, for strong smart electric grid system provides sound assurance.
Accompanying drawing explanation
Fig. 1 is the Diagnosis system of mechanical failure schematic diagram of invention.
Fig. 2 is the Diagnosis system of mechanical failure structured flowchart of invention.
Fig. 3 is the monitoring process flow diagram of the Diagnosis system of mechanical failure of invention.
In figure, have: vibration transducer 1, signal processing circuit 2, constant current source 2.1, signal amplifier 2.2, data collecting card 3, A/D module 3.1, I/O module 3.2, computing machine 4, breaker arc extinguishing chamber component 5, crossbeam 6, feet 7, mechanism case 8, communication bus 9.
Embodiment
Below in conjunction with accompanying drawing, the invention will be further described.
As seen from Figure 1, a kind of Mechanical Failure of HV Circuit Breaker rapid diagnosis system, this Mechanical Failure of HV Circuit Breaker rapid diagnosis system involving vibrations sensor (1), signal processing circuit (2), data collecting card (3), computing machine (4); Described vibration transducer (1) is fixedly installed on the crossbeam (6) of primary cut-out, be connected with signal processing circuit (2) by signal wire vibration transducer (1), the output of signal processing circuit (2) is connected with data collecting card (3), the input channel of described data collecting card (3) is closed a floodgate with in circuit breaker mechanism case and open position signal is connected, and data collecting card (3) is connected with computing machine (4) by communication bus (9).
As seen from Figure 2, signal processing circuit (2) comprises constant current source (2.1) and signal amplifier (2.2), and data collecting card comprises A/D module (3.1) and I/O module (3.2); Vibration transducer (1) is fixedly mounted on the crossbeam (6) of primary cut-out (5), vibration transducer (1), constant current source (2.1) and signal amplifier (2.2) are connected successively, signal amplifier (2.2) output terminal is connected with A/D module (3.1) input end, and the input end of I/O module (3.2) is connected with sub-gate position make and break contact with closing position in circuit breaker mechanism case; Data collecting card (3) is connected with computing machine (4) by communication bus (9).
As seen from Figure 3, the Mechanical Failure of HV Circuit Breaker diagnostic procedure of Mechanical Failure of HV Circuit Breaker rapid diagnosis system comprises the following steps:
Step S01, constant current source (2.1) provides vibration transducer (1) working current, and obtain the voltage signal relevant to tested vibratory output by working current, voltage signal is the vibration signal of vibration transducer (1), voltage signal is sent into signal amplifier (2.2) and is amplified, and the voltage signal after amplification is delivered to the A/D module (3.1) of data collecting card (3), and voltage signal is converted to digital signal, be that vibration signal is changed for digital signal, digital signal is sent to computing machine;
Step S02, the signal of closing position (8.1) and sub-gate position (8.1) make and break contact in I/O module (3.2) monitoring breaker mechanism case, and closing position (8.1) and sub-gate position (8.2) switching node signal are sent to computing machine;
Step S03, computing machine (4) receives after the vibration signal and step S02 closing position (8.1) and sub-gate position (8.2) make and break contact signal of step S01, the digital signal of computing machine (4) comparison step S01 and the default threshold value of making an uproar of filtering, and the closing position of determining step S02 (8.1) and sub-gate position (8.2) make and break contact signal, analyzing and diagnosing Mechanical Failure of HV Circuit Breaker.
Step S03 specifically comprises the following steps:
1) computing machine (4) on-line monitoring Circuit breaker vibration signal, Circuit breaker vibration signal and the default threshold value of making an uproar of filtering are compared, if be more than or equal to the default threshold value of making an uproar of filtering, enter step 2), determine whether making process, otherwise continue the output signal of monitoring A/D module (3.1);
2) if the sub-gate position switch closure of primary cut-out (5) and closing position switch opens, judge that this process is making process, after record one combination lock vibration signal, carry out "on" position threshold decision, if Circuit breaker vibration signal is less than "on" position threshold value, complete combined floodgate vibration signal record, and return to step 1) continue monitoring breaker vibration signal, otherwise continue to record combined floodgate vibration signal;
3) if the closing position switch closure of primary cut-out (5) and sub-gate position switch opens, judge that this process is separating brake process, record separating brake vibration signal, after recording a component lock vibration signal, carry out gate-dividing state threshold decision, if the vibration signal of surveying is less than gate-dividing state threshold value, complete separating brake vibration signal record, and return to step 1) continuation monitoring breaker vibration signal, otherwise continue to record separating brake vibration signal.
The above is only the preferred embodiment of the present invention; be noted that for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (6)
1. a Mechanical Failure of HV Circuit Breaker rapid diagnosis system, is characterized in that: involving vibrations sensor (1), signal processing circuit (2), data collecting card (3), computing machine (4);
Described signal processing circuit (2) comprises constant current source (2.1) and signal amplifier (2.2);
Described data collecting card comprises A/D module (3.1) and I/O module (3.2);
Described vibration transducer (1) is fixedly mounted on the crossbeam (6) of primary cut-out (5), described vibration transducer (1), constant current source (2.1) and signal amplifier (2.2) are connected successively, described signal amplifier (2.2) output terminal is connected with A/D module (3.1) input end, and the input end of described I/O module (3.2) is connected with sub-gate position (8.2) make and break contact with closing position (8.1) in circuit breaker mechanism case; Data collecting card (3) is connected with computing machine (4).
2. a kind of Mechanical Failure of HV Circuit Breaker rapid diagnosis system according to claim 1, is characterized in that, the Mechanical Failure of HV Circuit Breaker diagnostic procedure of described Mechanical Failure of HV Circuit Breaker rapid diagnosis system comprises the following steps:
Step S01, described constant current source (2.1) provides vibration transducer (1) working current, and obtain the voltage signal relevant to tested vibratory output by described working current, described voltage signal is the vibration signal of vibration transducer (1), described voltage signal is sent into signal amplifier (2.2) and is amplified, voltage signal after amplification is delivered to the A/D module (3.1) of data collecting card (3), voltage signal is converted to digital signal, be that vibration signal is changed for digital signal, described digital signal is sent to computing machine;
Step S02, the signal of closing position (8.1) and sub-gate position (8.1) make and break contact in I/O module (3.2) monitoring breaker mechanism case, and described closing position (8.1) and sub-gate position (8.2) switching node signal are sent to computing machine;
Step S03, computing machine (4) receives after the vibration signal and step S02 closing position (8.1) and sub-gate position (8.2) make and break contact signal of step S01, the digital signal of the more described step S01 of computing machine (4) and the default threshold value of making an uproar of filtering, and judge closing position (8.1) and sub-gate position (8.2) the make and break contact signal of described step S02, analyzing and diagnosing Mechanical Failure of HV Circuit Breaker.
3. a kind of Mechanical Failure of HV Circuit Breaker rapid diagnosis system according to claim 2, is characterized in that, described step S03 specifically comprises the following steps:
1) computing machine (4) on-line monitoring Circuit breaker vibration signal, Circuit breaker vibration signal and the default threshold value of making an uproar of filtering are compared, if be more than or equal to the default threshold value of making an uproar of filtering, enter step 2), determine whether making process, otherwise continue the output signal of monitoring A/D module (3.1);
2) if the sub-gate position switch closure of primary cut-out (5) and closing position switch opens, judge that this process is making process, after record one combination lock vibration signal, carry out "on" position threshold decision, if Circuit breaker vibration signal is less than "on" position threshold value, complete combined floodgate vibration signal record, and return to step 1) continue monitoring breaker vibration signal, otherwise continue to record combined floodgate vibration signal;
3) if the closing position switch closure of primary cut-out (5) and sub-gate position switch opens, judge that this process is separating brake process, record separating brake vibration signal, after recording a component lock vibration signal, carry out gate-dividing state threshold decision, if the vibration signal of surveying is less than gate-dividing state threshold value, complete separating brake vibration signal record, and return to step 1) continuation monitoring breaker vibration signal, otherwise continue to record separating brake vibration signal.
4. a kind of Mechanical Failure of HV Circuit Breaker rapid diagnosis system according to claim 2, it is characterized in that, described step S03 computer acquisition is after the vibration signal and step S02 closing position (8.1) and sub-gate position (8.2) make and break contact signal of step S01, computing machine (4) also comprises the signal processing collecting: the envelope spectrum that extracts vibration signal, extract vibration signal frequency spectrum based on envelope spectrum, vibration signal frequency spectrum and the data in the circuit breaker failure feature database of setting up are in advance compared, realize fault diagnosis.
5. a kind of Mechanical Failure of HV Circuit Breaker rapid diagnosis system according to claim 4, it is characterized in that, described knowledge base process of establishing comprises: the vibration signal frequency spectrum that the isolating switch of normal condition and malfunction is extracted is compared, the mechanical fault that stoppage circuit breaker is likely occurred is compared one by one, sets up thus the knowledge base that vibration signal frequency spectrum is corresponding with Mechanical Failure of HV Circuit Breaker.
6. a kind of Mechanical Failure of HV Circuit Breaker rapid diagnosis system according to claim 1, is characterized in that, described data collecting card (3) is connected with computing machine (4) by communication bus (9).
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Cited By (9)
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| CN104236699A (en) * | 2014-10-10 | 2014-12-24 | 天津学子电力设备科技有限公司 | Simulation load vibration test method of transformer |
| CN104568134A (en) * | 2014-12-26 | 2015-04-29 | 国家电网公司 | Feature extraction method and device for mechanical vibration signals of high-voltage circuit breaker |
| CN104597397A (en) * | 2015-01-13 | 2015-05-06 | 国家电网公司 | Method and system for diagnosing fault type of breaker |
| CN108414075A (en) * | 2018-03-09 | 2018-08-17 | 国网陕西省电力公司电力科学研究院 | A kind of high-voltage circuitbreaker fastening bolt loosens detection device and detection method |
| CN108428602A (en) * | 2018-05-16 | 2018-08-21 | 南京谷贝电气科技有限公司 | A kind of antisurge interference vibration trigger device for breaker signal acquisition |
| 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 |
| CN109900469A (en) * | 2019-03-28 | 2019-06-18 | 西安交通大学 | A kind of high-voltage circuitbreaker STRESS RELAXATION OF HELICAL SPRING fault detection means and method |
| CN110187264A (en) * | 2019-05-29 | 2019-08-30 | 西安西电电气研究院有限责任公司 | Method and device for determining mechanical recession of high-voltage circuit breaker |
| CN110470465A (en) * | 2019-09-19 | 2019-11-19 | 武汉市华英电力科技有限公司 | A kind of breaker test method and system based on analysis of vibration signal |
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| CN104236699A (en) * | 2014-10-10 | 2014-12-24 | 天津学子电力设备科技有限公司 | Simulation load vibration test method of transformer |
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| CN104597397A (en) * | 2015-01-13 | 2015-05-06 | 国家电网公司 | Method and system for diagnosing fault type of breaker |
| CN104597397B (en) * | 2015-01-13 | 2017-10-03 | 国家电网公司 | The fault type diagnostic method and system of breaker |
| CN108414075A (en) * | 2018-03-09 | 2018-08-17 | 国网陕西省电力公司电力科学研究院 | A kind of high-voltage circuitbreaker fastening bolt loosens detection device and detection method |
| CN108428602A (en) * | 2018-05-16 | 2018-08-21 | 南京谷贝电气科技有限公司 | A kind of antisurge interference vibration trigger device for breaker signal acquisition |
| 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 |
| CN109900469A (en) * | 2019-03-28 | 2019-06-18 | 西安交通大学 | A kind of high-voltage circuitbreaker STRESS RELAXATION OF HELICAL SPRING fault detection means and method |
| CN110187264A (en) * | 2019-05-29 | 2019-08-30 | 西安西电电气研究院有限责任公司 | Method and device for determining mechanical recession of high-voltage circuit breaker |
| CN110187264B (en) * | 2019-05-29 | 2021-08-20 | 西安西电电气研究院有限责任公司 | Method and device for determining mechanical recession of high-voltage circuit breaker |
| CN110470465A (en) * | 2019-09-19 | 2019-11-19 | 武汉市华英电力科技有限公司 | A kind of breaker test method and system based on analysis of vibration signal |
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Effective date of registration: 20140428 Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Applicant after: State Grid Corporation of China Applicant after: JIANGSU ELECTRIC POWER Co. Applicant after: JIANGSU ELECTRIC POWER COMPANY MAINTENANCE BRANCH Address before: 210000, Jiangsu, Jiangning Development Zone, Nanjing, the source of the road, No. 58, -5 Applicant before: JIANGSU ELECTRIC POWER COMPANY MAINTENANCE BRANCH |
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Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Co-patentee after: JIANGSU ELECTRIC POWER Co. Patentee after: State Grid Corporation of China Co-patentee after: STATE GRID JIANGSU ELECTRIC POWER Co.,Ltd. MAINTENANCE BRANCH Address before: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Co-patentee before: JIANGSU ELECTRIC POWER Co. Patentee before: State Grid Corporation of China Co-patentee before: MAINTENANCE DIVISION OF STATE GRID JIANGSU ELECTRIC POWER Co. Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Co-patentee after: JIANGSU ELECTRIC POWER Co. Patentee after: State Grid Corporation of China Co-patentee after: MAINTENANCE DIVISION OF STATE GRID JIANGSU ELECTRIC POWER Co. Address before: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Co-patentee before: JIANGSU ELECTRIC POWER Co. Patentee before: State Grid Corporation of China Co-patentee before: JIANGSU ELECTRIC POWER COMPANY MAINTENANCE BRANCH |
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