CN109425826A - A kind of switchgear intelligent measurement terminal - Google Patents

A kind of switchgear intelligent measurement terminal Download PDF

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Publication number
CN109425826A
CN109425826A CN201710721339.4A CN201710721339A CN109425826A CN 109425826 A CN109425826 A CN 109425826A CN 201710721339 A CN201710721339 A CN 201710721339A CN 109425826 A CN109425826 A CN 109425826A
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CN
China
Prior art keywords
switchgear
dsp chip
divide
data
shut brake
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201710721339.4A
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Chinese (zh)
Inventor
沈晓峰
徐友刚
陆敏安
徐萍
方祺
杨国健
顾华
张佳栋
王福菊
姚磊
赵斯韦
王建高
张健
刘斌
贾雅君
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SHANGHAI JUNSHI ELECTRICAL SCIENCE and TECHNOLOGY Co Ltd
State Grid Shanghai Electric Power Co Ltd
Original Assignee
SHANGHAI JUNSHI ELECTRICAL SCIENCE and TECHNOLOGY Co Ltd
State Grid Shanghai Electric Power Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by SHANGHAI JUNSHI ELECTRICAL SCIENCE and TECHNOLOGY Co Ltd, State Grid Shanghai Electric Power Co Ltd filed Critical SHANGHAI JUNSHI ELECTRICAL SCIENCE and TECHNOLOGY Co Ltd
Priority to CN201710721339.4A priority Critical patent/CN109425826A/en
Publication of CN109425826A publication Critical patent/CN109425826A/en
Pending legal-status Critical Current

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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/327Testing of circuit interrupters, switches or circuit-breakers
    • G01R31/3271Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices

Abstract

The invention discloses a kind of switchgear intelligent measurement terminals, including sensor unit, analog signal conditioning circuit, dsp chip, power module, jtag interface, clock module, wireless communication module, liquid crystal display and memory, the sensor unit includes linear displacement transducer, vibrating sensor, Hall current sensor and temperature sensor;The sensor unit, analog signal conditioning circuit and dsp chip are sequentially connected;The power module is connected with the analog signal conditioning circuit and dsp chip respectively;The jtag interface, clock module, wireless communication module, liquid crystal display and memory are connected with the dsp chip respectively.Switchgear intelligent measurement terminal of the invention, can be realized switchgear divide-shut brake coil stroke and velocity measuring, divide-shut brake coil current detection and operating process in vibration signal detection, for realize switchgear defect intelligent measurement basic data is provided.

Description

A kind of switchgear intelligent measurement terminal
Technical field
The present invention relates to a kind of switchgear intelligent measurement terminals.
Background technique
Compared with transformer, generator, high-tension switch gear on-line monitoring technique is started late.In a sense, " GIS technology " and the concept of " repair based on condition of component " promote the development of switchgear on-line monitoring technique.But after the nineties Switchgear especially high-voltage circuitbreaker on-line monitoring technique just has gradually developed, this is primarily due to present electric system Accident not merely with its it is measured the harm of electric system caused by economic loss.
With the rapid development of semiconductor technology and various novel monitoring technology, created for the on-line monitoring of switchgear Condition.Some advanced countries from the 1990s initially enter by machine performance monitor based on the Predictive Maintenance epoch, should Technical application and research and development quickly, have accumulated mass data experience, have formd more mature method and produced some functions It is more complete, the higher product of interference free performance.2000, ALSTOM company had developed relatively advanced CBWatch-1 system, The system can accurate measurements SF6 breaker pressure value and forecast pressure variation, provide low pressure alarming signal, and be applied to the U.S. Grizzly substation.The representative SF6 Series Circuit Breakers monitoring system produced there are also U.S. CE I company can be online SF6 gas pressure and temperature in arc-chutes are monitored, and can be in its density of line computation, monitoring breaker internal heater, operation electric current And divide-shut brake coil working situation, prediction arc-chutes medium leakage trend and other failures.
The relationship in breaker service life and drop-out current in addition, American scholar takes the lead in providing proposes " arcing contact electric life " Concept, the concept of " full working scope closing loop integrity monitoring " is also what the same period proposed, and research work at this time is mainly It is carried out around circuit-breaker status maintenance.Goed deep into recent years with research, the height that various countries successively all produce oneself is broken Road device on-Line Monitor Device, but all exist testing result adaptability and some projects detection means it is still very unsatisfactory.
Domestic unit is to the speed that live breaker mechanic property examination mainly includes switching on and off, time, the same period, division Lock coil current waveform, speed stroke curve etc., wherein judging the feelings of breaker defect using divide-shut brake coil current waveform Condition is less, and lacks the judgement of theory analysis and defect type.When testing breaker operating characteristic, focus exists more The projects such as breaker switching on and off time, the same period, stroke characteristic curve, concern and utilization for switching on and off coil current waveform It is less.
All in all from the above development situation, most monitoring systems not well by diagnostic techniques and prison Survey technology combines, and analyzing and diagnosing is also only limitted to exceeded alarm, and specific detailed analyzing and diagnosing is substantially complete by testing crew At.So the development trend of on-line monitoring technique should improve the reliability and sensitivity of monitoring system from now on, constantly accumulating Develop artificial intelligence technology on the basis of monitoring data and diagnostic experiences, establish artificial neural network and expert system, is done step-by-step Automaticdiagnosis.
Divide-shut brake coil is the critical elements in high-tension switch gear operating mechanism, the level-one control as switchgear operation Unit processed, structure are generally solenidal electromagnet.Magnetic flux, the iron core of coil inside are generated when passing through electric current in divide-shut brake coil It is inhaled and is moved by magnetic force, so that controlling breaker completes separating brake or closing operation.Coil current time to time change, the current waveform are anti- The working condition of divide-shut brake coil itself and the mechanism controlled in operation has been reflected, has contained and largely can be used as diagnosis The information of mechanical breakdown.
Laboratory and on-site test experience have shown that, divide-shut brake coil current waveform have good repeatability.By to point The monitoring of closing coil electric current, can calculate operating mechanism starting the time, iron core run duration, coil need conduction time Deng can determine whether iron core stroke, the iron core clamping stagnation, coil state of switchgear in combination with the parameter area of switchgear itself The mechanism action situation of (such as whether there are turn-to-turn short circuits) and operating mechanism.
Information rich in can be used as the foundation of diagnostic machinery failure in the electric current of switchgear divide-shut brake coil, it can There are iron core stroke, iron core clamping stagnation etc. with the state of reflection.It, can be with by operating the monitoring of coil action current to switching on and off Working condition and the machinery operating mechanism situation etc. for solving breaker secondary control loop, provide an assistant criteria for maintenance.Cause This, the electric current of switching on and off coil is an important content of switchgear status monitoring.
Summary of the invention
The purpose of the present invention is overcoming the deficiencies of existing technologies, a kind of switchgear intelligent measurement terminal, Neng Goushi are provided Existing switchgear divide-shut brake coil stroke and velocity measuring, divide-shut brake coil current detection and operating process in vibration signal Detection, to realize that switchgear defect intelligent measurement provides basic data.
Realizing the technical solution of above-mentioned purpose is: a kind of switchgear intelligent measurement terminal, including sensor unit, simulation Signal conditioning circuit, dsp chip, power module, jtag interface, clock module, wireless communication module, liquid crystal display and storage Device, in which:
The sensor unit includes linear displacement transducer, vibrating sensor, Hall current sensor and temperature sensing Device;
The sensor unit, analog signal conditioning circuit and dsp chip are sequentially connected;
The power module is connected with the analog signal conditioning circuit and dsp chip respectively;
The jtag interface, clock module, wireless communication module, liquid crystal display and memory respectively with the DSP core Piece is connected.
Above-mentioned a kind of switchgear intelligent measurement terminal, wherein the linear displacement transducer real-time detection switch is set Standby divide-shut brake coil linear displacement signal, the divide-shut brake coil linear displacement signal pass through the analog signal conditioning circuit tune The dsp chip is transferred to after reason;
Vibration signal during the breaking-closing operating of the vibrating sensor real-time detection switchgear, the vibration signal The dsp chip is transferred to after analog signal conditioning circuit conditioning;
The divide-shut brake coil current signal of the Hall current sensor real-time detection switchgear, the divide-shut brake coil electricity Stream signal is transferred to the dsp chip after analog signal conditioning circuit conditioning;
The on/off switch coiled contact temperature signal of the temperature sensor real-time detection switchgear, on/off switch coil touching Head temperature signal is transferred to the dsp chip after analog signal conditioning circuit conditioning;
The dsp chip obtains corresponding divide-shut brake after received various signals are analyzed, converted and are filtered Coil straight-line displacement data, vibration data, divide-shut brake coil current data and on/off switch coiled contact temperature data, each data are logical It crosses the wireless communication module and is transmitted to host computer;
The clock module is used to provide time reference for the dsp chip;
The liquid crystal display is used for the divide-shut brake coil straight-line displacement data of display switch equipment, vibration data, division Brake cable loop current data and on/off switch coiled contact temperature data;
The memory is for storing divide-shut brake coil straight-line displacement data, vibration data, divide-shut brake coil current data With on/off switch coiled contact temperature data;
The power module is respectively the analog signal conditioning circuit and dsp chip power supply.
Above-mentioned a kind of switchgear intelligent measurement terminal, wherein the vibrating sensor selects band permanent magnetic chuck type collection At acceleration transducer, the vibratory output during the breaking-closing operating of switchgear from direct current to 2kHz is measured.
Above-mentioned a kind of switchgear intelligent measurement terminal, wherein the wireless communication module uses ZigBee wireless group Network Communication.
Switchgear intelligent measurement terminal of the invention can be realized stroke and the speed inspection of switchgear divide-shut brake coil The detection of vibration signal in survey, the detection and operating process of divide-shut brake coil current, to realize switchgear defect intelligent measurement Basic data is provided.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of switchgear intelligent measurement terminal of the invention.
Specific embodiment
It is right with reference to the accompanying drawing in order to make those skilled in the art be better understood when technical solution of the present invention Its specific embodiment is described in detail:
Referring to Fig. 1, highly preferred embodiment of the present invention, a kind of switchgear intelligent measurement terminal, including sensor unit 11, analog signal conditioning circuit 12, dsp chip 13, power module 14, jtag interface 15, clock module 16, wireless communication module 17, liquid crystal display 18 and memory 19.
Sensor unit 11 includes linear displacement transducer 111, vibrating sensor 112, Hall current sensor 113 and temperature Spend sensor 114;Sensor unit 11, analog signal conditioning circuit 12 and dsp chip 13 are sequentially connected;Power module 14 is distinguished It is connected with analog signal conditioning circuit 12 and dsp chip 13;Jtag interface 15, clock module 16, wireless communication module 17, liquid crystal Display 18 and memory 19 are connected with dsp chip 13 respectively.
Vibrating sensor 112 selects band permanent magnetic chuck type Integrated Accelerometer, and dress is removed flexibly and easily, can be measured open Vibratory output during the breaking-closing operating of pass equipment from direct current to 2kHz.
Mechanical oscillation signal is an information carrier abundant, includes a large amount of device status information, it is by a series of Transient waveform is constituted, the reflection of inside " event " during each transient waveform is breaker operator.Vibration signal is to setting The response of standby internal a variety of driving sources, for switching devices such as breaker, driving source includes on/off switch electromagnet, energy storage machine The movement of the internal components such as structure, tripping mechanism, four-bar mechanism.The change of breaker mechanical state, will lead to vibration signal Variation.By detection means appropriate and signal processing method, the driving source of vibration can be identified, to find out the source of trouble --- This is using vibration signal as the theoretical basis of fault diagnosis foundation.
For breaker during splitting or integrating lock, mechanical oscillation can be caused by colliding or rubbing every time between mechanism components.Open circuit Iron, the steel structure of device are the good conductors of vibration signal, although for same breaker multi-pass operation, as long as in its identical portions The vibrational waveform that position measures has good repeatability.Equally, different model different brands are shown by multiple actual observation record The vibration signal of circuit breaker operation mechanism has it unique;And the same breaker or same type measured in different time Its corresponding vibration signal of breaker have similitude.But before the variation or breaker overhaul at same breaker measuring point position Afterwards, intrinsic vibration characteristics has small change.For this purpose, reasonably selecting the identical measuring point position of same type breaker is The basic demand of vibration detection, and the main reason in advance not ready-made sample database.Because test job does not often allow It turns on the switch cabinet cabinet door and places vibrating sensor, so the selection of its proper site is particularly important.Band permanent magnetic chuck type is integrated to be added Velocity sensor only needs to be adsorbed on switchgear, and dress is removed flexible and convenient.
Wireless communication module 17 uses ZigBee wireless networking communications, and dsp chip 13 passes through Zigbee wireless networking communications Various data are uploaded to host computer i.e. background monitoring system by mode.
A kind of switchgear intelligent measurement terminal of the invention, when in use, each sensor and switchgear to be detected It is connected, switchgear intelligent measurement terminal is communicated by Zigbee wireless networking communications mode with background monitoring system, Working principle are as follows:
(1) the divide-shut brake coil linear displacement signal of 111 real-time detection switchgear of linear displacement transducer, the divide-shut brake Coil linear displacement signal is transferred to dsp chip 13 after the conditioning of analog signal conditioning circuit 12;
(2) vibration signal during the breaking-closing operating of 112 real-time detection switchgear of vibrating sensor, vibration letter Number by analog signal conditioning circuit 12 conditioning after be transferred to dsp chip 13;
(3) the divide-shut brake coil current signal of 113 real-time detection switchgear of Hall current sensor, the divide-shut brake coil Current signal is transferred to dsp chip 13 after the conditioning of analog signal conditioning circuit 12;
(4) the on/off switch coiled contact temperature signal of 114 real-time detection switchgear of temperature sensor, the on/off switch coil Contact temperature signal is transferred to dsp chip 13 after the conditioning of analog signal conditioning circuit 12.
(5) dsp chip 13 obtains corresponding divide-shut brake after received various signals are analyzed, converted and are filtered Coil straight-line displacement data, vibration data, divide-shut brake coil current data and on/off switch coiled contact temperature data, each data are logical It crosses wireless communication module 17 and is transmitted to host computer;
(6) clock module 16 is used to provide time reference for dsp chip 13, the various signals handled by dsp chip 13 Switch to record having time when corresponding data;
(7) liquid crystal display 18 is used for the divide-shut brake coil straight-line displacement data of display switch equipment, vibration data, division Brake cable loop current data and on/off switch coiled contact temperature data;
(8) memory 19 is for storing divide-shut brake coil straight-line displacement data, vibration data, divide-shut brake coil current data With on/off switch coiled contact temperature data;
(9) power module 14 is respectively that analog signal conditioning circuit 12 and dsp chip 13 are powered.
In conclusion switchgear intelligent measurement terminal of the invention, can be realized the row of switchgear divide-shut brake coil Journey and velocity measuring, divide-shut brake coil current detection and operating process in vibration signal detection, to realize that switchgear lacks It falls into intelligent measurement and basic data is provided.
Those of ordinary skill in the art it should be appreciated that more than embodiment be intended merely to illustrate the present invention, And be not used as limitation of the invention, as long as the change in spirit of the invention, to embodiment described above Change, modification will all be fallen within the scope of claims of the present invention.

Claims (4)

1. a kind of switchgear intelligent measurement terminal, which is characterized in that including sensor unit, analog signal conditioning circuit, DSP Chip, power module, jtag interface, clock module, wireless communication module, liquid crystal display and memory, in which:
The sensor unit includes linear displacement transducer, vibrating sensor, Hall current sensor and temperature sensor;
The sensor unit, analog signal conditioning circuit and dsp chip are sequentially connected;
The power module is connected with the analog signal conditioning circuit and dsp chip respectively;
The jtag interface, clock module, wireless communication module, liquid crystal display and memory respectively with the dsp chip phase Even.
2. a kind of switchgear intelligent measurement terminal according to claim 1, which is characterized in that the straight-line displacement sensing The divide-shut brake coil linear displacement signal of device real-time detection switchgear, the divide-shut brake coil linear displacement signal pass through the mould The dsp chip is transferred to after quasi- signal conditioning circuit conditioning;
Vibration signal during the breaking-closing operating of the vibrating sensor real-time detection switchgear, the vibration signal pass through The dsp chip is transferred to after the analog signal conditioning circuit conditioning;
The divide-shut brake coil current signal of the Hall current sensor real-time detection switchgear, divide-shut brake coil current letter Number by the analog signal conditioning circuit conditioning after be transferred to the dsp chip;
The on/off switch coiled contact temperature signal of the temperature sensor real-time detection switchgear, the on/off switch coiled contact temperature Degree signal is transferred to the dsp chip after analog signal conditioning circuit conditioning;
The dsp chip obtains corresponding divide-shut brake coil after received various signals are analyzed, converted and are filtered Straight-line displacement data, vibration data, divide-shut brake coil current data and on/off switch coiled contact temperature data, each data pass through institute It states wireless communication module and is transmitted to host computer;
The clock module is used to provide time reference for the dsp chip;
The liquid crystal display is used for the divide-shut brake coil straight-line displacement data of display switch equipment, vibration data, division brake cable Loop current data and on/off switch coiled contact temperature data;
The memory is for storing divide-shut brake coil straight-line displacement data, vibration data, divide-shut brake coil current data and conjunction Opening coil contact temperature data;
The power module is respectively the analog signal conditioning circuit and dsp chip power supply.
3. a kind of switchgear intelligent measurement terminal according to claim 1, which is characterized in that the vibrating sensor choosing With band permanent magnetic chuck type Integrated Accelerometer, the breaking-closing operating vibration from direct current to 2kHz in the process of switchgear is measured Momentum.
4. a kind of switchgear intelligent measurement terminal according to claim 1, which is characterized in that the wireless communication module Using ZigBee wireless networking communications.
CN201710721339.4A 2017-08-21 2017-08-21 A kind of switchgear intelligent measurement terminal Pending CN109425826A (en)

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Application Number Priority Date Filing Date Title
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110646183A (en) * 2019-09-04 2020-01-03 国网浙江省电力有限公司嘉兴供电公司 High-voltage circuit breaker mechanical property quick detection device based on thing networking
EP3739348A1 (en) * 2019-05-16 2020-11-18 Hitachi, Ltd. Diagnostic method of switchgear and device thereof

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201681143U (en) * 2010-03-23 2010-12-22 西安工程大学 Online monitoring device for mechanical characteristic of high-voltage circuit breaker
CN203522137U (en) * 2013-10-26 2014-04-02 安徽龙波电气有限公司 Intelligent electrified on-line monitoring and protection device for high-voltage vacuum circuit breaker
CN105823981A (en) * 2016-03-11 2016-08-03 国网天津市电力公司 On-line monitoring system of high-voltage circuit breaker and data processing method thereof
CN205844484U (en) * 2016-07-28 2016-12-28 厦门理工学院 A kind of portable high-pressure breaker mechanic property tester
CN207148285U (en) * 2017-08-21 2018-03-27 国网上海市电力公司 A kind of switchgear Intelligent Measurement terminal

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201681143U (en) * 2010-03-23 2010-12-22 西安工程大学 Online monitoring device for mechanical characteristic of high-voltage circuit breaker
CN203522137U (en) * 2013-10-26 2014-04-02 安徽龙波电气有限公司 Intelligent electrified on-line monitoring and protection device for high-voltage vacuum circuit breaker
CN105823981A (en) * 2016-03-11 2016-08-03 国网天津市电力公司 On-line monitoring system of high-voltage circuit breaker and data processing method thereof
CN205844484U (en) * 2016-07-28 2016-12-28 厦门理工学院 A kind of portable high-pressure breaker mechanic property tester
CN207148285U (en) * 2017-08-21 2018-03-27 国网上海市电力公司 A kind of switchgear Intelligent Measurement terminal

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3739348A1 (en) * 2019-05-16 2020-11-18 Hitachi, Ltd. Diagnostic method of switchgear and device thereof
CN110646183A (en) * 2019-09-04 2020-01-03 国网浙江省电力有限公司嘉兴供电公司 High-voltage circuit breaker mechanical property quick detection device based on thing networking
CN110646183B (en) * 2019-09-04 2021-06-08 国网浙江省电力有限公司嘉兴供电公司 High-voltage circuit breaker mechanical property quick detection device based on thing networking

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Application publication date: 20190305