CN105467313A - Online power system circuit breaker mechanical fault diagnosis system - Google Patents
Online power system circuit breaker mechanical fault diagnosis system Download PDFInfo
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- CN105467313A CN105467313A CN201610013686.7A CN201610013686A CN105467313A CN 105467313 A CN105467313 A CN 105467313A CN 201610013686 A CN201610013686 A CN 201610013686A CN 105467313 A CN105467313 A CN 105467313A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
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- General Physics & Mathematics (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
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Abstract
The invention discloses an online power system circuit breaker fault diagnosis system, which comprises a signal acquisition module, a signal processing system, and a shock-proof and moisture-proof box, wherein the signal acquisition module is one or more sensors fixedly arranged on the circuit breaker and the operating mechanism of the circuit breaker, and signal and ground two-wire DC voltage is outputted; the signal processing system is electrically connected with the signal acquisition module and comprises a signal filtering module, a voltage conversion module, an A/D conversion module, an expert diagnosis module and a wireless transmitting module connected in sequence; the shock-proof and moisture-proof box is formed by buckling a groove-shaped shell and an upper cover plate, a sealing strip is arranged in a buckling seam between the groove-shaped shell and the cover plate, the box is internally provided with a moisture-proof moisture absorption bag, a plurality of vibration-proof pads are fixed on the surrounding walls of the groove-shaped shell, and a vibration-proof plate suspended in the box for mounting the signal processing system is fixed on the vibration-proof pad. The circuit breaker field state can be monitored in an online mode, the fault can be reproduced, fault data can be acquired, the mechanical fault diagnosis on the circuit breaker can be carried out, the system is vibration-proof and moisture-proof, wireless communication can be carried out, and the system is safe, reliable, economical and affordable.
Description
Technical field
The present invention relates to a kind of electric power system circuit breaker mechanical fault in-circuit diagnostic system, especially a kind of electric power system circuit breaker Diagnosis system of mechanical failure with quakeproof moisture-proof and wireless communication function.
Background technology
Isolating switch is as the visual plant of protection electric system, and its reliability and stability is significant to power grid security.Because breaker mechanical parts thereof is many, Machinery Ministry bit motion is frequent in addition, causes probability of malfunction very large.
In prior art, for the diagnosis of breaker mechanical fault, at least there is following problem:
(1) at present for the diagnosis of breaker mechanical fault, normally carry out when prophylactic repair or the trouble hunting after breaking down, belong to Off-line faults diagnosis, sometimes can not Timeliness coverage for mechanical fault.And isolating switch is not generally equipped with the condition monitoring and fault diagnosis system being installed on equipment working site at present, lack fault recorder data, often cannot reappear again fault when Off-line faults diagnosis and obtain fault data, having a strong impact on the mechanical fault diagnosis of isolating switch.
(2) isolating switch especially primary cut-out owing to requiring quick acting switching-off, combined floodgate, the course of action time is very short, vibratory impulse is very large, common data acquisition system (DAS) be directly installed on isolating switch or isolating switch operating mechanism case in easily damage because being hit.And the working site of isolating switch especially outdoor breaker is easily subject to misty rain weather effect, common data acquisition system (DAS) easily cannot work or damage because making moist.
(3) usually do not reserve unnecessary communication cable pipeline between Substation control room and isolating switch, the data of fault diagnosis system are transferred to pulpit according to wired mode, and quantities is large, technically uneconomical.
Summary of the invention
Technical matters to be solved by this invention, is just to provide a kind of electric power system circuit breaker online system failure diagnosis, and it can the state at on-line monitoring isolating switch scene, reappears fault and obtains fault data, helping the mechanical fault diagnosis carrying out isolating switch; And can quakeproof moisture-proof and wireless telecommunications, safe and reliable economic and practical.
Solve the problems of the technologies described above, the technical solution adopted in the present invention is as follows:
A kind of electric power system circuit breaker online system failure diagnosis, is characterized in that comprising: signal acquisition module, signal processing system, wireless transport module, quakeproof moisture-proof case and human-computer interface system;
Described signal acquisition module is the one or more sensors for measuring circuit-breaker status signal, and described sensor is fixedly mounted on isolating switch or its operating mechanism, and the signal of described sensor exports as signal and ground twin wire DC voltage;
Described signal processing system comprise successively be connected with lower module: signal filtering module, voltage transformation module, A/D modular converter, expert diagnosis module and wireless transmitter module; Signal filtering module, voltage transformation module, A/D modular converter and expert diagnosis module are fixed on same PCB printed circuit board (PCB), are connected successively by bifilar printed circuit cable; Expert diagnosis module is connected by TTL communication interface with wireless transmitter module;
Signal processing system is connected with signal acquisition module by d. c. voltage signal transmission cable; Preferably, connected by low noise concentric cable;
The effect of signal filtering module carries out filtering de-noising to the acceleration signal recorded, the interference noise in eliminating tolerancing signal;
The effect of voltage transformation module is meet the d. c. voltage signal of A/D modular converter to input request signal by the output transform electrical signals of signal filtering module;
A/D modular converter is used for the simulating signal after voltage transformation block transforms to be converted into digital signal, and is real-time transmitted to expert diagnosis module;
Expert diagnosis module, for the treatment of the sensor signal data received, calculates measured instantaneous rate of change and variable quantity and compares with setting threshold value, judging whether to there is fault;
Wireless transmitter module for receiving the result of expert diagnosis module, and is converted into wireless encoding signal, through home control network communication protocol network, is transmitted into human-computer interface system;
Described human-computer interface system comprises interconnective wireless receiving module and microsystem.
Described quakeproof moisture-proof box structure is: fastened by channel-shaped housing and upper cover plate two parts and form, and is provided with sealing strip sealing in the fastening seam of channel-shaped housing and cover plate; Case is built-in with moistureproof desiccant package, the wall of channel-shaped housing is fixed with some vibrationproof feets, vibrationproof feet is fixed with and is suspended in case for installing the shockproof flat board of signal processing system.
Described vibration pad leg structure is: one end of spring is fixed on one end of a rubber buffer post, and the other end of rubber buffer post is fixed on the wall of channel-shaped housing, and the other end of spring supports shockproof flat board.
Described human-computer interface system comprises wireless receiving module and microsystem.The effect of wireless receiving module is: by the output data (as: acceleration, rate of acceleration change, acceleration change numerical quantity and threshold value overload alarm etc.) of home control network communication protocol network reception signal processing system.The effect of microsystem is: show the real time data and historical data that receive, save historical data.
Beneficial effect: compared with prior art, the present invention has the following advantages:
Adopt system of the present invention to carry out circuit breaker failure diagnosis, the on-line monitoring of circuit breaker parameters can be realized, obtain fault data in time; System has quakeproof moisture-proof function, can be directly installed on the working site of isolating switch, such as on isolating switch or in the operating mechanism case of isolating switch; System, by home control network communication protocol HP M diagnostic result, without the need to additionally laying communication cable, and conveniently can realize the expansion of greater number wireless transmitter module.
Accompanying drawing explanation
Fig. 1 is overall construction drawing of the present invention;
Fig. 2 a is a kind of quakeproof moisture-proof case example structure cross-sectional schematic of the present invention;
Fig. 2 b is the schematic top plan view after Fig. 2 a removes cover plate;
Fig. 3 a is the structure cross-sectional schematic of a kind of shockproof feet embodiment of the present invention;
Fig. 3 b is the structure schematic top plan view of Fig. 3 a.
Embodiment
Below in conjunction with accompanying drawing, by embodiment, the invention will be further described.
See Fig. 1, the isolating switch online system failure diagnosis embodiment with quakeproof moisture-proof and wireless communication function of the present invention, comprising: signal acquisition module 10, signal processing system 20, quakeproof moisture-proof case 30 and human-computer interface system 40.
Signal acquisition module 10 is the one or more sensors for measuring circuit-breaker status signal, and it is fixedly mounted on isolating switch or its operating mechanism, and the signal of sensor exports as twin wire (signal) DC voltage.The piezoelectric acceleration sensor (being also called ic-type piezoelectric sensor, IEPE) that the present embodiment signal acquisition module 10 selects voltage mode signal to export, it has the following advantages: less size, wider bandwidth; Built-in charge amplifier carries out signal amplification; Output impedance is low, does not need to use low noise concentric cable.
Signal acquisition module 10 is connected by d. c. voltage signal transmission cable with signal processing system 20, and the present embodiment is for connect by low noise concentric cable.
Signal processing system comprise successively be connected with lower module: signal filtering module 21, voltage transformation module 22, A/D modular converter 23, expert diagnosis module 24 and wireless transmitter module 25; Signal filtering module 21, voltage transformation module 22, A/D modular converter 23 and expert diagnosis module 24 to be fixed on same PCB printed circuit board (PCB) and to be connected successively by bifilar printed circuit cable; Expert diagnosis module 24 is connected by TTL communication interface with wireless transmitter module 25.
Signal filtering module 21, its effect is: carry out filtering de-noising to the acceleration signal recorded, the interference noise in eliminating tolerancing signal; The MAX264 Programable switched capacitor filter that the signal filtering module 21 of the present embodiment selects MAXIMIntegrated company of the U.S. to produce, MAX264 can work in that band is logical, low pass, high pass, band fall into or under all-pass pattern, its cut-off frequecy of passband can reach 140kHz.
The effect of voltage transformation module 22 is meet the d. c. voltage signal of A/D modular converter to input request signal by the output transform electrical signals of signal filtering module; The voltage transformation module 22 of the present embodiment realizes with scaling circuit.
A/D modular converter 23 for the simulating signal after voltage transformation block transforms is converted into digital signal, and is real-time transmitted to expert diagnosis module.The ADC0832 chip that the A/D converting system 23 of the present embodiment selects National Semiconductor (NationalSemiconductor) to produce.ADC0832 is 8 bit resolution double channel A/D conversion chips, its best result is distinguished and can be reached 256 grades, and during 5V Power supply, input voltage is between 0-5V, and frequency of operation is 250kHz, switching time is 32 μ s, can meet the rapidity of fault diagnosis system and the requirement of accuracy.
Expert diagnosis module 24, for the treatment of the sensor signal data received, calculates measured instantaneous rate of change and variable quantity and compares with setting threshold value, judging whether to there is fault.The expert diagnosis module 24 of the present embodiment is DSP, and the TMS320F2812 chip selecting American TI Company to produce transforms the digital signal obtained, is sent to TMS320F2812 chip by SPI interface through A/D modular converter 23.
Wireless transmitter module 25 for receiving the result of expert diagnosis module, and is converted into wireless encoding signal, through home control network communication protocol network, is transmitted into human-computer interface system.The C201B wireless serial data transparent transmission module that the wireless transmitter module 25 of the present embodiment selects Ling Cheng core electron company limited of Shenzhen to produce, be characterized in: 2.5 watts high-power, the remote transparent transmission of sighting distance 5000m, 413-453Mhz is optional for FSK frequency modulation, TTL interface can directly connect single-chip microcomputer or dsp chip TX/RX pin transceiving data.
Signal processing system 20 is fixed on shockproof dull and stereotyped 36 in quakeproof moisture-proof case, and human-computer interface system 40 comprises interconnective wireless receiving module 41 and microsystem 42.
See Fig. 2 a and Fig. 2 b, quakeproof moisture-proof case 30 is fastened by channel-shaped housing 31 and upper cover plate 32 two parts and forms, and is provided with sealing strip 33 and seals in the fastening seam of channel-shaped housing 31 and cover plate 32; Case is built-in with moistureproof desiccant package 34, the wall of channel-shaped housing 31 is fixed with some vibrationproof feets 35, vibrationproof feet is fixed with and is suspended in case, for installing shockproof dull and stereotyped 36 of signal processing system.
See Fig. 3 a and Fig. 3 b, vibrationproof feet 35 structure of the present embodiment is: one end of spring 351 is fixed on one end of a rubber buffer post 352, the other end of rubber buffer post 352 is fixed on the wall of channel-shaped housing 31, and the other end of spring 351 supports shockproof dull and stereotyped 36.
Human-computer interface system 40 comprises wireless receiving module 41 and microsystem 42, and signal processing system and human-computer interface system carry out wireless connections by home control network communication protocol network.
The effect of wireless receiving module is: by the output data (as: acceleration, rate of acceleration change, acceleration change numerical quantity and threshold value overload alarm etc.) of home control network communication protocol network reception signal processing system.Preferably, the C202B wireless serial data transparent transmission module that wireless receiving module 41 selects Ling Cheng core electron company limited of Shenzhen to produce, be characterized in: 2.5 watts high-power, the remote transparent transmission of sighting distance 5000m, 413-453Mhz is optional for FSK frequency modulation, and RS-232 interface can the serial ports transceiving data of direct connected with computer system.
The effect of microsystem 42 is: show the real time data and historical data that receive, save historical data.
The present invention at least has following beneficial effect:
Adopt system of the present invention to carry out circuit breaker failure diagnosis, the on-line monitoring of circuit breaker parameters can be realized, obtain fault data in time; System has quakeproof moisture-proof function, can be directly installed on the working site of isolating switch, such as on isolating switch or in the operating mechanism case of isolating switch; System, by home control network communication protocol HP M diagnostic result, without the need to additionally laying communication cable, and conveniently can realize the expansion of greater number wireless transmitter module.
Claims (3)
1. an electric power system circuit breaker online system failure diagnosis, is characterized in that comprising: signal acquisition module, signal processing system, wireless transport module, human-computer interface system and quakeproof moisture-proof case;
Described signal acquisition module is the one or more sensors for measuring circuit-breaker status signal, and described sensor is fixedly mounted on isolating switch or its operating mechanism, and the signal of described sensor exports as signal and ground twin wire DC voltage;
Described signal processing system comprises the signal filtering module, voltage transformation module, A/D modular converter, expert diagnosis module and the wireless transmitter module that are connected successively; Signal filtering module, voltage transformation module, A/D modular converter and expert diagnosis module are fixed on same PCB printed circuit board (PCB), are connected successively by bifilar printed circuit cable; Expert diagnosis module is connected by TTL communication interface with wireless transmitter module; Signal processing system is connected with described signal acquisition module by d. c. voltage signal transmission cable;
Described human-computer interface system comprises interconnective wireless receiving module and microsystem, and wireless receiving module is connected by home control network communication protocol network with wireless transmitter module;
Described quakeproof moisture-proof box structure is: fastened by channel-shaped housing and upper cover plate two parts and form, and is provided with sealing strip sealing in the fastening seam of channel-shaped housing and cover plate; Case is built-in with moistureproof desiccant package, the wall of channel-shaped housing is fixed with some vibrationproof feets, vibrationproof feet is fixed with and is suspended in case for installing the shockproof flat board of described signal processing system.
2. electric power system circuit breaker online system failure diagnosis according to claim 1, it is characterized in that: described vibration pad leg structure is: one end of spring is fixed on one end of a rubber buffer post, the other end of rubber buffer post is fixed on the wall of channel-shaped housing, and the other end of spring supports shockproof flat board.
3. electric power system circuit breaker online system failure diagnosis according to claim 2, is characterized in that: described signal processing system is connected with described signal acquisition module by low noise concentric cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610013686.7A CN105467313A (en) | 2016-01-07 | 2016-01-07 | Online power system circuit breaker mechanical fault diagnosis system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610013686.7A CN105467313A (en) | 2016-01-07 | 2016-01-07 | Online power system circuit breaker mechanical fault diagnosis system |
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| CN105467313A true CN105467313A (en) | 2016-04-06 |
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| CN201610013686.7A Pending CN105467313A (en) | 2016-01-07 | 2016-01-07 | Online power system circuit breaker mechanical fault diagnosis system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106950493A (en) * | 2017-05-02 | 2017-07-14 | 贵州电网有限责任公司电力科学研究院 | Breaker on-line monitoring system based on infrared detection |
| CN110426220A (en) * | 2019-05-23 | 2019-11-08 | 中国航空工业集团公司上海航空测控技术研究所 | Mechanical Fault Monitoring of HV system based on auto-adaptive filter circuit |
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| US7403015B2 (en) * | 2005-02-09 | 2008-07-22 | Eaton Corporation | System for wireless monitoring of circuit breakers |
| CN101339229A (en) * | 2008-08-18 | 2009-01-07 | 江西省电力科学研究院 | High-voltage circuit-breaker status on-line monitoring method based on synchronous sampling |
| CN102508128A (en) * | 2011-10-24 | 2012-06-20 | 天津大学 | Switch cabinet local discharge transient-to-ground voltage detection system based on wireless network |
| CN203839426U (en) * | 2014-05-27 | 2014-09-17 | 新沂润扬电子科技有限公司 | Novel electric bicycle lithium battery case |
| CN205333811U (en) * | 2016-01-07 | 2016-06-22 | 广东电网有限责任公司电力科学研究院 | Electric power system circuit breaker mechanical breakdown online diagnosis system |
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2016
- 2016-01-07 CN CN201610013686.7A patent/CN105467313A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7403015B2 (en) * | 2005-02-09 | 2008-07-22 | Eaton Corporation | System for wireless monitoring of circuit breakers |
| CN101339229A (en) * | 2008-08-18 | 2009-01-07 | 江西省电力科学研究院 | High-voltage circuit-breaker status on-line monitoring method based on synchronous sampling |
| CN102508128A (en) * | 2011-10-24 | 2012-06-20 | 天津大学 | Switch cabinet local discharge transient-to-ground voltage detection system based on wireless network |
| CN203839426U (en) * | 2014-05-27 | 2014-09-17 | 新沂润扬电子科技有限公司 | Novel electric bicycle lithium battery case |
| CN205333811U (en) * | 2016-01-07 | 2016-06-22 | 广东电网有限责任公司电力科学研究院 | Electric power system circuit breaker mechanical breakdown online diagnosis system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106950493A (en) * | 2017-05-02 | 2017-07-14 | 贵州电网有限责任公司电力科学研究院 | Breaker on-line monitoring system based on infrared detection |
| CN110426220A (en) * | 2019-05-23 | 2019-11-08 | 中国航空工业集团公司上海航空测控技术研究所 | Mechanical Fault Monitoring of HV system based on auto-adaptive filter circuit |
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Application publication date: 20160406 |