CN103776622B - A kind of Mechanical Failure of HV Circuit Breaker rapid diagnosis system - Google Patents
A kind of Mechanical Failure of HV Circuit Breaker rapid diagnosis system Download PDFInfo
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- CN103776622B CN103776622B CN201410007890.9A CN201410007890A CN103776622B CN 103776622 B CN103776622 B CN 103776622B CN 201410007890 A CN201410007890 A CN 201410007890A CN 103776622 B CN103776622 B CN 103776622B
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Abstract
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).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) with to close a floodgate in circuit breaker mechanism case and open position signal is connected, data collecting card (3) is connected with computing machine (4) by communication bus (9).This Mechanical Failure of HV Circuit Breaker rapid diagnosis system is by record combined floodgate vibration signal and separating brake vibration signal carry out fault diagnosis automatically, can assess the state of primary cut-out and serviceability in real time, thus ensure the safe and reliable work of primary cut-out.
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, when there are the abnormal conditions such as short circuit when electric system, the mechanical faults such as the Ju Dong ﹑ Wu Dong ﹑ slow motion of isolating switch and three-phase asynchrony all may cause serious accident, even can cause equipment explosion, bring massive losses to the life of the people 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 carry out diagnosis timely to the fault of the emerged in operation of primary cut-out and seem very important, the diagnosis research carrying out Mechanical Failure of HV Circuit Breaker has huge economic and social benefit.
The planned preventive reqair blindness of current implementation is large, time-consuming, effort, also can bring a lot of non-essential shut-down, and operation and excessive field-strip can reduce the reliability of isolating switch frequently.Therefore, how the duty of isolating switch is effectively monitored, the fault of Timeliness coverage 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, for ensureing that the safe and reliable operation of electrical network has very important meaning.Along with electric system improving constantly cost-effectiveness requirement, scheduled overhaul can not adapt to on-the-spot demand, monitors and fault diagnosis has been trend of the times to mechanical state of high-voltage circuit breaker.
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 the Diagnosis system of mechanical failure that are applicable to primary cut-out are provided, the state of primary cut-out can be judged quickly and easily, 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) are connected successively with signal amplifier (2.2), 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 delivers to the A/D module (3.1) of data collecting card (3), and voltage signal is converted to digital signal, namely vibration signal conversion is in order to digital signal, and digital signal is sent to computing machine;
The signal of closing position (8.1) and sub-gate position (8.1) make and break contact in step S02, 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, after computing machine (4) receives the vibration signal of step S01 and step S02 closing position (8.1) and sub-gate position (8.2) make and break contact signal, the digital signal of computing machine (4) comparison step S01 and default filter are made an uproar threshold value, 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, threshold value of Circuit breaker vibration signal and default filter being made an uproar compares, and to make an uproar threshold value, then enter step 2 if be more than or equal to default filter), determine whether making process, otherwise continue the output signal of monitoring A/D module (3.1);
2) if the sub-gate position switch of primary cut-out (5) closes and closing position switch opens, then judge that this process is making process, "on" position threshold decision is carried out after record one combination lock vibration signal, if Circuit breaker vibration signal is less than "on" position threshold value, then complete combined floodgate vibration signal record, and return to step 1) continue monitoring breaker vibration signal, otherwise continue record combined floodgate vibration signal;
3) if the closing position switch of primary cut-out (5) closes and sub-gate position switch opens, then judge that this process is separating brake process, record separating brake vibration signal, gate-dividing state threshold decision is carried out after recording a component lock vibration signal, if survey vibration signal and be less than gate-dividing state threshold value, then complete separating brake vibration signal record, and return to step 1) continuation monitoring breaker vibration signal, otherwise continue record separating brake vibration signal.
After step S03 computer acquisition to the vibration signal of step S01 and step S02 closing position (8.1) and sub-gate position (8.2) make and break contact signal, computing machine (4) also comprises the signal processing collected: the envelope spectrum extracting vibration signal, vibration signals spectrograph is extracted based on envelope spectrum, vibration signals spectrograph and the data in the circuit breaker failure feature database set up in advance are compared, realizes fault diagnosis.
Described knowledge base process of establishing comprises: compared by the vibration signals spectrograph that the isolating switch of normal condition and malfunction extracts, the mechanical fault that stoppage circuit breaker likely occurs is compared one by one, sets up the knowledge base that vibration signals spectrograph is corresponding with Mechanical Failure of HV Circuit Breaker thus.
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, can assess the state of primary cut-out and serviceability in real time, thus ensure the safe and reliable work of primary cut-out, this system can solve the deficiency of periodic monitoring that existing primary cut-out takes and 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.
Have in figure: 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, primary cut-out 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) with to close a floodgate in circuit breaker mechanism case and open position signal is connected, 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) are connected successively with signal amplifier (2.2), 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 delivers to the A/D module (3.1) of data collecting card (3), and voltage signal is converted to digital signal, namely vibration signal conversion is in order to digital signal, and digital signal is sent to computing machine;
The signal of closing position (8.1) and sub-gate position (8.1) make and break contact in step S02, 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, after computing machine (4) receives the vibration signal of step S01 and step S02 closing position (8.1) and sub-gate position (8.2) make and break contact signal, the digital signal of computing machine (4) comparison step S01 and default filter are made an uproar threshold value, 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, threshold value of Circuit breaker vibration signal and default filter being made an uproar compares, and to make an uproar threshold value, then enter step 2 if be more than or equal to default filter), determine whether making process, otherwise continue the output signal of monitoring A/D module (3.1);
2) if the sub-gate position switch of primary cut-out (5) closes and closing position switch opens, then judge that this process is making process, "on" position threshold decision is carried out after record one combination lock vibration signal, if Circuit breaker vibration signal is less than "on" position threshold value, then complete combined floodgate vibration signal record, and return to step 1) continue monitoring breaker vibration signal, otherwise continue record combined floodgate vibration signal;
3) if the closing position switch of primary cut-out (5) closes and sub-gate position switch opens, then judge that this process is separating brake process, record separating brake vibration signal, gate-dividing state threshold decision is carried out after recording a component lock vibration signal, if survey vibration signal and be less than gate-dividing state threshold value, then complete separating brake vibration signal record, and return to step 1) continuation monitoring breaker vibration signal, otherwise continue 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 (3)
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) are connected successively with signal amplifier (2.2), 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 in circuit breaker mechanism case (8.1); Data collecting card (3) is connected with computing machine (4);
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 delivers to the A/D module (3.1) of data collecting card (3), voltage signal is converted to digital signal, namely vibration signal conversion is in order to digital signal, and described digital signal is sent to computing machine;
The signal of closing position (8.1) and sub-gate position (8.1) make and break contact in step S02, 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, after computing machine (4) receives the vibration signal of step S01 and step S02 closing position (8.1) and sub-gate position (8.2) make and break contact signal, the digital signal of computing machine (4) more described step S01 and default filter are made an uproar threshold value, 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;
Described step S03 specifically comprises the following steps:
1) computing machine (4) on-line monitoring Circuit breaker vibration signal, threshold value of Circuit breaker vibration signal and default filter being made an uproar compares, and to make an uproar threshold value, then enter step 2 if be more than or equal to default filter), determine whether making process, otherwise continue the output signal of monitoring A/D module (3.1);
2) if the sub-gate position switch of primary cut-out (5) closes and closing position switch opens, then judge that this process is making process, "on" position threshold decision is carried out after record one combination lock vibration signal, if Circuit breaker vibration signal is less than "on" position threshold value, then complete combined floodgate vibration signal record, and return to step 1) continue monitoring breaker vibration signal, otherwise continue record combined floodgate vibration signal;
3) if the closing position switch of primary cut-out (5) closes and sub-gate position switch opens, then judge that this process is separating brake process, record separating brake vibration signal, gate-dividing state threshold decision is carried out after recording a component lock vibration signal, if survey vibration signal and be less than gate-dividing state threshold value, then complete separating brake vibration signal record, and return to step 1) continuation monitoring breaker vibration signal, otherwise continue record separating brake vibration signal;
After described step S03 computer acquisition to the vibration signal of step S01 and step S02 closing position (8.1) and sub-gate position (8.2) make and break contact signal, computing machine (4) also comprises the signal processing collected: the envelope spectrum extracting vibration signal, vibration signals spectrograph is extracted based on envelope spectrum, vibration signals spectrograph and the data in the circuit breaker failure feature database set up in advance are compared, realizes fault diagnosis.
2. a kind of Mechanical Failure of HV Circuit Breaker rapid diagnosis system according to claim 1, it is characterized in that, described knowledge base process of establishing comprises: compared by the vibration signals spectrograph that the isolating switch of normal condition and malfunction extracts, the mechanical fault that stoppage circuit breaker likely occurs is compared one by one, sets up the knowledge base that vibration signals spectrograph is corresponding with Mechanical Failure of HV Circuit Breaker thus.
3. 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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| 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 |
| 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 |
| CN109900469B (en) * | 2019-03-28 | 2020-06-19 | 西安交通大学 | Stress relaxation fault detection device and method for high-voltage circuit breaker spiral spring |
| 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 |
| CN110470465B (en) * | 2019-09-19 | 2021-09-10 | 武汉市华英电力科技有限公司 | Circuit breaker testing method and system based on vibration signal analysis |
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