CN103413721A - Vacuum degree on-line monitoring system of vacuum circuit breaker - Google Patents

Vacuum degree on-line monitoring system of vacuum circuit breaker Download PDF

Info

Publication number
CN103413721A
CN103413721A CN2013103541654A CN201310354165A CN103413721A CN 103413721 A CN103413721 A CN 103413721A CN 2013103541654 A CN2013103541654 A CN 2013103541654A CN 201310354165 A CN201310354165 A CN 201310354165A CN 103413721 A CN103413721 A CN 103413721A
Authority
CN
China
Prior art keywords
unit
signal
line monitoring
vacuum
vacuity
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.)
Granted
Application number
CN2013103541654A
Other languages
Chinese (zh)
Other versions
CN103413721B (en
Inventor
张弢
王同阁
董良
孙熠
赵霞兵
张红霞
李春光
李卫国
胡兆明
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.)
BEIJING CREATIVE DISTRIBUTION AUTOMATION Co Ltd
Original Assignee
BEIJING CREATIVE DISTRIBUTION AUTOMATION 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 BEIJING CREATIVE DISTRIBUTION AUTOMATION Co Ltd filed Critical BEIJING CREATIVE DISTRIBUTION AUTOMATION Co Ltd
Priority to CN201310354165.4A priority Critical patent/CN103413721B/en
Publication of CN103413721A publication Critical patent/CN103413721A/en
Application granted granted Critical
Publication of CN103413721B publication Critical patent/CN103413721B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The invention provides a vacuum degree on-line monitoring system of a vacuum circuit breaker. The system comprises three phase vacuum arc-extinguishing chambers and electric field probes respectively inducting phase angle information of each phase vacuum arc-extinguishing chamber. The system is characterized by further comprising a control circuit connected with the electric filed probes, and the control circuit sends the phase angle information into a central control mechanism after performing vector summation on the phase angle information inducted by the electric filed probes. The vacuum degree on-line monitoring system of the vacuum circuit breaker has the advantages that due to the fact that vector summation is performed on signals of the three probes and then digital filtering is performed through a single-chip microcomputer, high frequency harmonic waves can be removed, and the situation whether one or two of the three phase vacuum arc-extinguishing chambers leaks or leak can be clearly found.

Description

The Vacuity of Vacuum Circuit Breakers on-line monitoring system
Technical field
The present invention relates to a kind of Vacuity of Vacuum Circuit Breakers on-line monitoring system.
Background technology
Research in the past has been found that when vacuum level of vacuum arc-quenching chamber drops to certain value Discharge Phenomena in arc control device, but when the vacuum arc control device leaked air pressure fully and reach atmospheric pressure, electric discharge phenomena will disappear.Whether dimension, the mode of only putting or monitoring the potential change of radome by monitoring office can't be distinguished vacuum interrupter and leak.
Summary of the invention
Technical problem to be solved by this invention is to overcome the deficiency of above-mentioned prior art, provide a kind of and do vector summing by the signal by three probes, by single-chip microcomputer, do digital filtering again, remove high-frequency harmonic, just can find clearly a phase or two-phase leakage in the three-phase vacuum interrupter.
The main technical schemes adopted according to a kind of Vacuity of Vacuum Circuit Breakers on-line monitoring system provided by the invention is: the electric field probe that comprises the three-phase vacuum interrupter and respond to respectively described every phase vacuum interrupter phase angle information, also comprise the control circuit be connected with described electric field probe, the phase angle information that described control circuit is sensed each described electric field probe carries out sending into center-control mechanism after vector summing.
Vacuity of Vacuum Circuit Breakers on-line monitoring system provided by the invention also can have following attached technical characterictic:
Described control circuit comprises signal input unit, operation amplifier unit, filter unit and the signal output unit be connected, the induced signal that described signal input unit receives described electric field probe inputs to described operation amplifier unit, by described operation amplifier unit, undertaken exporting described filter unit to after vector summing, described filter unit carries out sending into signal output unit after low-pass digital filter and amplification to the numerical value after described operation amplifier unit calculates.
Described signal input unit comprises three described reception subelements that receive respectively the electric field probe induced signal, described each receive subelement and comprise respectively capacitor C 408, C409 and C410 and corresponding series connection resistance R 422A, R422B and the R422C on it, described three receive subelements and are connected in parallel on described signal computing unit.
Described operation amplifier unit comprises operational amplifier U400A and the resistance R 410 be connected with described operational amplifier U400A, R423, R407 and capacitor C 411, C406, and the induced signal that described operational amplifier U400A receives three described reception subelements inputs to described filter unit after when carrying out vector summing, amplifying.
Described filter unit comprises the operational amplifier U401A that is connected and U401B, capacitor C 407, resistance R 420, R424, R425, and described operational amplifier U401A and the U401B signal after to described signal computing unit input processing carries out inputing to signal output unit after twice low-pass filtering.
On each described electric field probe, all has a sensor circuit, the described sensor circuit of described sensor circuit induction comprises signal gathering unit, signal condition unit and signal conversion unit, AC power frequency potential change and high-frequency impulse current potential change information on the radome of the described vacuum interrupter of described signal gathering unit collection, the described signal conversion unit of input after described signal condition unit carries out the balance computing.
Described signal gathering unit comprises metal substrate J1, the J3 be connected, capacitor C 1, resistance R 5 and operational amplifier U1A, AC power frequency potential change on described radome and high-frequency impulse current potential can cause that the metal substrate electric loading newly distributes, and can reflect the variation of current potential on radome by the voltage on Detection capacitance c1.
Described signal condition unit comprises capacitor C 2, C3, C5, C6, C7, resistance R 2, R3, the R6 be connected.
Described signal conversion unit comprises operational amplifier U2B, transducer U2, capacitor C 4, resistance R 1, R4 and the metal substrate J2 be connected, the high frequency response of U1B, C4 conditioning signal, the voltage of U1B output has changed the electric current that flows through R1, R4, by R4, feed back to input again, U2 transfers voltage signal to current signal.
The beneficial effect that adopts Vacuity of Vacuum Circuit Breakers on-line monitoring system provided by the invention to bring is: Vacuity of Vacuum Circuit Breakers on-line monitoring system proposed by the invention, by in three-phase vacuum extinction, electric field probe being installed, although change because vacuum interrupter leaks the current potential amplitude that can not cause radome fully, but can produce its phase angle changes, by the signal by three probes, do vector summing, by single-chip microcomputer, do digital filtering again, remove high-frequency harmonic, just can find clearly, in the three-phase vacuum interrupter, a phase or two-phase are leaked.
The accompanying drawing explanation
Fig. 1 is structure chart of the present invention.
Fig. 2 is the structure chart of control circuit in the present invention.
Fig. 3 is the structure chart of sensor circuit in the present invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail:
As shown in Figure 1 to Figure 3, embodiment according to a kind of Vacuity of Vacuum Circuit Breakers on-line monitoring system provided by the invention, the electric field probe 2 that comprises three-phase vacuum interrupter 1 and respond to respectively described every phase vacuum interrupter phase angle information, also comprise the control circuit 3 be connected with described electric field probe 2, the phase angle information that described control circuit is sensed each described electric field probe 2 carries out sending into center-control mechanism after vector summing, the technical staff monitors vacuum interrupter by the information that center-control mechanism is transmitted, vacuum interrupter is keeped in repair timely when occurring that a phase or two-phase are leaked, by in three-phase vacuum extinction 1, electric field probe 2 being installed, although change because vacuum interrupter leaks the current potential amplitude that can not cause radome fully, but can produce its phase angle changes, we do vector summing by the signal by three probes, by single-chip microcomputer, do digital filtering again, remove high-frequency harmonic, just can find clearly, in the three-phase vacuum interrupter, a phase or two-phase are leaked.
Referring to Fig. 2, according to Vacuity of Vacuum Circuit Breakers on-line monitoring system provided by the invention, described control circuit 3 comprises the signal input unit 31 be connected, operation amplifier unit 32, filter unit 33 and signal output unit 34, the induced signal that described signal input unit 31 receives described electric field probe 2 inputs to described operation amplifier unit 32, by described operation amplifier unit 32, undertaken exporting described filter unit 33 to after vector summing, 33 pairs of numerical value after described signal computing unit 32 calculates of described filter unit carry out sending into signal output unit 34 after low-pass digital filter and amplification.
Referring to Fig. 2, according to Vacuity of Vacuum Circuit Breakers on-line monitoring system provided by the invention, described signal input unit 31 comprises three described reception subelements of the induced signal that receives respectively electric field probe 2, described each reception subelement comprises respectively capacitor C 408, C409 and C410 and the corresponding series connection resistance R 422A on it, R422B and R422C, described three reception subelements are connected in parallel on described signal computing unit, SIGA, SIGB, SIGC is the three-phase probe output, by U400A, sue for peace, by U401A, carrying out low-pass filtering again sends into MCU and does the AD sampling analysis.
The numerical value that MCU obtains the AD sampling is done the IIR low-pass digital filter.MCU (Micro Control Unit) Chinese is micro-control unit, claim again one chip microcomputer (Single Chip Microcomputer) or single-chip microcomputer, refer to appearance and development thereof along with large scale integrated circuit, by the CPU of computer, RAM, ROM, timer conter and multiple I/O Interface integration on a slice chip, form the computer of chip-scale, for different application scenarios, do various combination and control.The analog signal conversion of circuit the inside is that the circuit of digital signal is called for short the AD circuit
Referring to Fig. 2, according to Vacuity of Vacuum Circuit Breakers on-line monitoring system provided by the invention, described operation amplifier unit 32 comprises operational amplifier U400A and the resistance R 410 be connected with described operational amplifier U400A, R423, R407 and capacitor C 411, C406, and the induced signal that described operational amplifier U400A receives three described reception subelements inputs to described filter unit after when carrying out vector summing, amplifying.
Referring to Fig. 2, according to Vacuity of Vacuum Circuit Breakers on-line monitoring system provided by the invention, described filter unit 33 comprises the operational amplifier U401A that is connected and U401B, capacitor C 407, resistance R 420, R424, R425, and described operational amplifier U401A and the U401B signal after to described signal computing unit input processing carries out inputing to signal output unit after twice low-pass filtering.
Capacitor C 408, C409 and C410 are as capacitance filtering DC component, operational amplifier U400A, resistance R 422 and R410 have formed the summing circuit of a homophase input, resistance R 423 and R407 determine multiplication factor, and capacitor C 406 and C411 are for eliminating frequency and phase distortion.Operational amplifier U401A and U401B form the low pass filter of a double operational, fix on 500Hz by frequency.
Referring to Fig. 3, according to Vacuity of Vacuum Circuit Breakers on-line monitoring system provided by the invention, on each described electric field probe 2, all has a sensor circuit, described sensor circuit comprises signal gathering unit 21, signal condition unit 22 and signal conversion unit 23, AC power frequency potential change and high-frequency impulse current potential change information on the radome of the described vacuum interrupter 1 of described signal gathering unit 21 collection, the described signal conversion unit 23 of input after described signal condition unit 22 carries out the balance computing.
Referring to Fig. 3, according to Vacuity of Vacuum Circuit Breakers on-line monitoring system provided by the invention, described signal gathering unit 21 comprises metal substrate J1, the J3 be connected, capacitor C 1, resistance R 5 and operational amplifier U1A, AC power frequency potential change on described radome and high-frequency impulse current potential can cause that the metal substrate electric loading newly distributes, by the voltage on Detection capacitance c1, can reflect the variation of current potential on radome, R5, C1 and metal substrate form a capacitance partial pressure circuit, U1A plays the effect of voltage follower, so that follow-up signal is processed.
Referring to Fig. 3, according to Vacuity of Vacuum Circuit Breakers on-line monitoring system provided by the invention, described signal condition unit 22 comprises capacitor C 2, C3, C5, C6, C7, resistance R 2, R3, the R6 be connected, described signal conversion unit 23 comprises operational amplifier U2B, transducer U2, capacitor C 4, resistance R 1, R4 and the metal substrate J2 be connected, the high frequency response of U1B, C4 conditioning signal, the voltage of U1B output has changed the electric current that flows through R1, R4, by R4, feed back to input again, U2 transfer voltage signal to current signal so that when transmission anti-interference.

Claims (9)

1. Vacuity of Vacuum Circuit Breakers on-line monitoring system, the electric field probe that comprises the three-phase vacuum interrupter and respond to respectively described every phase vacuum interrupter phase angle information, it is characterized in that: also comprise the control circuit be connected with described electric field probe, the phase angle information that described control circuit is sensed each described electric field probe carries out sending into center-control mechanism after vector summing.
2. Vacuity of Vacuum Circuit Breakers on-line monitoring system as claimed in claim 1, it is characterized in that: described control circuit comprises signal input unit, operation amplifier unit, filter unit and the signal output unit be connected, the induced signal that described signal input unit receives described electric field probe inputs to described operation amplifier unit, by described operation amplifier unit, undertaken exporting described filter unit to after vector summing, described filter unit carries out sending into signal output unit after low-pass digital filter and amplification to the numerical value after described operation amplifier unit calculates.
3. Vacuity of Vacuum Circuit Breakers on-line monitoring system as claimed in claim 2, it is characterized in that: described signal input unit comprises three described reception subelements that receive respectively the electric field probe induced signal, described each receive subelement and comprise respectively capacitor C 408, C409 and C410 and corresponding series connection resistance R 422A, R422B and the R422C on it, described three receive subelements and are connected in parallel on described signal computing unit.
4. Vacuity of Vacuum Circuit Breakers on-line monitoring system as claimed in claim 2, it is characterized in that: described operation amplifier unit comprises operational amplifier U400A and the resistance R 410 be connected with described operational amplifier U400A, R423, R407 and capacitor C 411, C406, and the induced signal that described operational amplifier U400A receives three described reception subelements inputs to described filter unit after when carrying out vector summing, amplifying.
5. Vacuity of Vacuum Circuit Breakers on-line monitoring system as claimed in claim 2, it is characterized in that: described filter unit comprises the operational amplifier U401A that is connected and U401B, capacitor C 407, resistance R 420, R424, R425, and described operational amplifier U401A and the U401B signal after to described signal computing unit input processing carries out inputing to signal output unit after twice low-pass filtering.
6. Vacuity of Vacuum Circuit Breakers on-line monitoring system as claimed in claim 1, it is characterized in that: all have a sensor circuit on each described electric field probe, the described sensor circuit of described sensor circuit induction comprises signal gathering unit, signal condition unit and signal conversion unit, AC power frequency potential change and high-frequency impulse current potential change information on the radome of the described vacuum interrupter of described signal gathering unit collection, the described signal conversion unit of input after described signal condition unit carries out the balance computing.
7. Vacuity of Vacuum Circuit Breakers on-line monitoring system as claimed in claim 6, it is characterized in that: described signal gathering unit comprises metal substrate J1, the J3 be connected, capacitor C 1, resistance R 5 and operational amplifier U1A, AC power frequency potential change on described radome and high-frequency impulse current potential can cause that the metal substrate electric loading newly distributes, and can reflect the variation of current potential on radome by the voltage on Detection capacitance c1.
8. Vacuity of Vacuum Circuit Breakers on-line monitoring system as claimed in claim 6, it is characterized in that: described signal condition unit comprises capacitor C 2, C3, C5, C6, C7, resistance R 2, R3, the R6 be connected.
9. Vacuity of Vacuum Circuit Breakers on-line monitoring system as claimed in claim 6, it is characterized in that: described signal conversion unit comprises operational amplifier U2B, transducer U2, capacitor C 4, resistance R 1, R4 and the metal substrate J2 be connected, the high frequency response of U1B, C4 conditioning signal, the voltage of U1B output has changed the electric current that flows through R1, R4, by R4, feed back to input again, U2 transfers voltage signal to current signal.
CN201310354165.4A 2013-08-14 2013-08-14 Vacuity of Vacuum Circuit Breakers on-line monitoring system Active CN103413721B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310354165.4A CN103413721B (en) 2013-08-14 2013-08-14 Vacuity of Vacuum Circuit Breakers on-line monitoring system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201310354165.4A CN103413721B (en) 2013-08-14 2013-08-14 Vacuity of Vacuum Circuit Breakers on-line monitoring system

Publications (2)

Publication Number Publication Date
CN103413721A true CN103413721A (en) 2013-11-27
CN103413721B CN103413721B (en) 2015-09-02

Family

ID=49606722

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201310354165.4A Active CN103413721B (en) 2013-08-14 2013-08-14 Vacuity of Vacuum Circuit Breakers on-line monitoring system

Country Status (1)

Country Link
CN (1) CN103413721B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105405714A (en) * 2015-11-25 2016-03-16 国网河南省电力公司三门峡供电公司 Non-contact type 10kV vacuum circuit breaker vacuum degree test apparatus
CN105575724A (en) * 2014-10-17 2016-05-11 国家电网公司 Vacuum-degree on-line monitoring system of vacuum circuit breaker
EP3098830A1 (en) 2015-05-28 2016-11-30 Schneider Electric Industries SAS Device for monitoring partial discharges in an electrical network

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020149372A1 (en) * 1999-12-16 2002-10-17 Hitachi, Ltd. Vacuum switch including vacuum-measurement devices, switchgear using the vacuum switch, and operation method thereof
CN102254736A (en) * 2011-05-30 2011-11-23 山东鲁亿通智能电气股份有限公司 Method for online monitoring vacuum degree of arc extinguishing chamber of vacuum switch of intelligent switch cabinet
CN202205650U (en) * 2011-08-25 2012-04-25 遵义长征电器开关设备有限责任公司 12kV vacuum arc extinguishing chamber capable of detecting vacuum degree and temperature on line
CN102800523A (en) * 2012-08-08 2012-11-28 成都凯赛尔电子有限公司 Solid-sealed polar pole realizing on-line monitoring of vacuum degree
CN203491185U (en) * 2013-08-14 2014-03-19 北京科锐配电自动化股份有限公司 Vacuum degree on-line monitoring system of vacuum circuit breaker

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020149372A1 (en) * 1999-12-16 2002-10-17 Hitachi, Ltd. Vacuum switch including vacuum-measurement devices, switchgear using the vacuum switch, and operation method thereof
CN102254736A (en) * 2011-05-30 2011-11-23 山东鲁亿通智能电气股份有限公司 Method for online monitoring vacuum degree of arc extinguishing chamber of vacuum switch of intelligent switch cabinet
CN202205650U (en) * 2011-08-25 2012-04-25 遵义长征电器开关设备有限责任公司 12kV vacuum arc extinguishing chamber capable of detecting vacuum degree and temperature on line
CN102800523A (en) * 2012-08-08 2012-11-28 成都凯赛尔电子有限公司 Solid-sealed polar pole realizing on-line monitoring of vacuum degree
CN203491185U (en) * 2013-08-14 2014-03-19 北京科锐配电自动化股份有限公司 Vacuum degree on-line monitoring system of vacuum circuit breaker

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105575724A (en) * 2014-10-17 2016-05-11 国家电网公司 Vacuum-degree on-line monitoring system of vacuum circuit breaker
EP3098830A1 (en) 2015-05-28 2016-11-30 Schneider Electric Industries SAS Device for monitoring partial discharges in an electrical network
FR3036843A1 (en) * 2015-05-28 2016-12-02 Schneider Electric Ind Sas DEVICE FOR MONITORING PARTIAL DISCHARGES IN AN ELECTRICAL NETWORK
US10228410B2 (en) 2015-05-28 2019-03-12 Schneider Electric Industries Sas Device for monitoring partial discharges in an electrical network
CN105405714A (en) * 2015-11-25 2016-03-16 国网河南省电力公司三门峡供电公司 Non-contact type 10kV vacuum circuit breaker vacuum degree test apparatus

Also Published As

Publication number Publication date
CN103413721B (en) 2015-09-02

Similar Documents

Publication Publication Date Title
CN103413721A (en) Vacuum degree on-line monitoring system of vacuum circuit breaker
CN103217572B (en) Alternating current voltage and zero-crossing examination device and method thereof
CN204613137U (en) Air-anion concentration detector
CN100460883C (en) Detection method for testing current in resistance property of lightning arrester
CN203491185U (en) Vacuum degree on-line monitoring system of vacuum circuit breaker
CN104820127A (en) Metal oxide arrester resistance current extracting method and device
Irmak et al. Design and application of a novel zero-crossing detector circuit
CN104280593A (en) Quick harmonic and reactive current detection method based on instantaneous reactive power theory
CN104065070B (en) A kind of digital monocyclic phase method based on compensation of delay controls Active Power Filter-APF
CN101995313A (en) Vacuum degree on-line monitor of vacuum circuit breaker based on pulse discharge detection
CN201383000Y (en) Electric energy meter detecting device
CN103134969B (en) A kind of power factor corrector and phase voltage method of estimation
CN102955589A (en) Touch-control panel control system and touch-control panel control method
CN201885852U (en) Online monitoring device for vacuum degree of vacuum circuit breaker on basis of pulse discharging detection
CN107436415B (en) Working method of online testing system for distributed power grid-connected inverter and capacitor
CN208721736U (en) A kind of wide-range voltage and current test device
CN103777126B (en) A kind of partial discharge of transformer sonac circuit structure
CN208207061U (en) The overload detector of new energy auto high-voltage electrical box
CN202159097U (en) DC mine elevator current converter harmonic wave detection apparatus
CN206209054U (en) GIS partial discharge electrification detection system
CN102221643A (en) Converter harmonic detector of direct current mine hoist
CN206710508U (en) A kind of harmonic measurement device
CN105575724A (en) Vacuum-degree on-line monitoring system of vacuum circuit breaker
CN104198813B (en) A kind of vertical correlation method measures the device and method of ultrasonic transducer impedance angle
CN203871265U (en) Vacuum circuit breaker vacuum degree on-line monitoring device

Legal Events

Date Code Title Description
PB01 Publication
C06 Publication
SE01 Entry into force of request for substantive examination
C10 Entry into substantive examination
GR01 Patent grant
C14 Grant of patent or utility model