CN203491185U - Vacuum degree on-line monitoring system of vacuum circuit breaker - Google Patents
Vacuum degree on-line monitoring system of vacuum circuit breaker Download PDFInfo
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- CN203491185U CN203491185U CN201320497088.3U CN201320497088U CN203491185U CN 203491185 U CN203491185 U CN 203491185U CN 201320497088 U CN201320497088 U CN 201320497088U CN 203491185 U CN203491185 U CN 203491185U
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Abstract
The utility model 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. The control circuit sends the phase angle information to a central control mechanism after performing the 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 the signals of the three probes and then digital filtering are performed through a single-chip microcomputer. Meanwhile, high frequency harmonic waves can be removed. The situation whether one or two of the three phase vacuum arc-extinguishing chambers leaks or leak can be clearly found.
Description
Technical field
The utility model 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 vacuum interrupter leaks air pressure completely and reaches atmospheric pressure, electric discharge phenomena will disappear.Dimension, whether the mode of only putting or monitoring the potential change of radome by monitoring office cannot be distinguished vacuum interrupter and leak.
Utility model content
Technical problem to be solved in the utility model is to overcome the deficiency of above-mentioned prior art, provide a kind of by the signal of three probes is done to vector summing, by single-chip microcomputer, do digital filtering again, remove high-frequency harmonic, just can find clearly a phase or two-phase leakage in three-phase vacuum interrupter.
The main technical schemes that a kind of Vacuity of Vacuum Circuit Breakers on-line monitoring system providing according to the utility model adopts is: the electric field probe that comprises three-phase vacuum interrupter and respond to respectively described every phase vacuum interrupter phase angle information, also comprise the control circuit being connected with described electric field probe, the phase angle information that described control circuit senses electric field probe described in each carries out sending into center-control mechanism after vector summing.
The Vacuity of Vacuum Circuit Breakers on-line monitoring system that the utility model provides also can have following attached technical characterictic:
Described control circuit comprises signal input unit, operation amplifier unit, filter unit and the signal output unit being 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 electric field probe induced signal, described each reception subelement comprises respectively capacitor C 408, C409 and C410 and corresponding resistance R 422A, R422B and the R422C connecting on it, and described three reception subelements are connected in parallel on described signal computing unit.
Described operation amplifier unit comprises operational amplifier U400A and the resistance R 410 being 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 amplifying when carrying out vector summing.
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.
Described in each, on electric field probe, all there is a sensor circuit, described sensor circuit is responded to described sensor circuit and is comprised signal gathering unit, signal condition unit and signal conversion unit, described signal gathering unit gathers AC power frequency potential change and the high-frequency impulse current potential change information on the radome of described vacuum interrupter, after described signal condition unit carries out balance computing, inputs described signal conversion unit.
Described signal gathering unit comprises metal substrate J1, the J3 being 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 the redistribution of metal substrate electric lotus, by the voltage on Detection capacitance C1, can reflect the variation of current potential on radome.
Described signal condition unit comprises capacitor C 2, C3, C5, C6, C7, resistance R 2, R3, the R6 being connected.
Described signal conversion unit comprises operational amplifier U2B, transducer U2, capacitor C 4, resistance R 1, R4 and the metal substrate J2 being 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 the Vacuity of Vacuum Circuit Breakers on-line monitoring system that adopts the utility model to provide brings is: the Vacuity of Vacuum Circuit Breakers on-line monitoring system that the utility model proposes, by electric field probe being installed in three-phase vacuum extinction, although can not cause the current potential amplitude of radome to change because vacuum interrupter leaks completely, but can produce its phase angle changes, by the signal of three probes is done to vector summing, by single-chip microcomputer, do digital filtering again, remove high-frequency harmonic, just can find clearly, in three-phase vacuum interrupter, a phase or two-phase are leaked.
Accompanying drawing explanation
Fig. 1 is structure chart of the present utility model.
Fig. 2 is the structure chart of control circuit in the utility model.
Fig. 3 is the structure chart of sensor circuit in the utility model.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail:
As shown in Figure 1 to Figure 3, the embodiment of a kind of Vacuity of Vacuum Circuit Breakers on-line monitoring system providing according to the utility model, 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 being connected with described electric field probe 2, the phase angle information that described control circuit senses electric field probe described in each 2 carries out sending into center-control mechanism after vector summing, the information that technical staff is transmitted by center-control mechanism is monitored vacuum interrupter, vacuum interrupter is keeped in repair timely when occurring one mutually or two-phase is leaked, by electric field probe 2 being installed in three-phase vacuum extinction 1, although can not cause the current potential amplitude of radome to change because vacuum interrupter leaks completely, but can produce its phase angle changes, we are by doing vector summing by the signal of three probes, by single-chip microcomputer, do digital filtering again, remove high-frequency harmonic, just can find clearly, in three-phase vacuum interrupter, a phase or two-phase are leaked.
Referring to Fig. 2, the Vacuity of Vacuum Circuit Breakers on-line monitoring system providing according to the utility model, described control circuit 3 comprises the signal input unit 31 being 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 the described filter units numerical value after described signal computing unit 32 calculates carry out low-pass digital filter and amplify after send into signal output unit 34.
Referring to Fig. 2, the Vacuity of Vacuum Circuit Breakers on-line monitoring system providing according to the utility model, 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 resistance R 422A connecting on it, R422B and R422C, described three reception subelements are connected in parallel on described signal computing unit, SIGA, SIGB, SIGC is three-phase probe output, by U400A, sue for peace, by U401A, carrying out low-pass filtering again sends into MCU and does AD sampling analysis.
The numerical value that MCU obtains AD sampling is done 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 circuit that the analog signal of circuit the inside is converted to digital signal is called for short AD circuit
Referring to Fig. 2, the Vacuity of Vacuum Circuit Breakers on-line monitoring system providing according to the utility model, described operation amplifier unit 32 comprises operational amplifier U400A and the resistance R 410 being 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 amplifying when carrying out vector summing.
Referring to Fig. 2, the Vacuity of Vacuum Circuit Breakers on-line monitoring system providing according to the utility model, 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 used for eliminating frequency and phase distortion.Operational amplifier U401A and U401B form the low pass filter of a double operational, by frequency, fix on 500Hz.
Referring to Fig. 3, the Vacuity of Vacuum Circuit Breakers on-line monitoring system providing according to the utility model, described in each, on electric field probe 2, all there is 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 are inputted described signal conversion unit 23 after described signal condition unit 22 carries out balance computing.
Referring to Fig. 3, the Vacuity of Vacuum Circuit Breakers on-line monitoring system providing according to the utility model, described signal gathering unit 21 comprises metal substrate J1, the J3 being 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 the redistribution of metal substrate electric lotus, 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, the Vacuity of Vacuum Circuit Breakers on-line monitoring system providing according to the utility model, described signal condition unit 22 comprises capacitor C 2, C3, C5, C6, C7, resistance R 2, R3, the R6 being connected, described signal conversion unit 23 comprises operational amplifier U2B, transducer U2, capacitor C 4, resistance R 1, R4 and the metal substrate J2 being 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 (8)
1. a Vacuity of Vacuum Circuit Breakers on-line monitoring system, the electric field probe that comprises 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 being connected with described electric field probe, the phase angle information that described control circuit senses electric field probe described in each carries out sending into center-control mechanism after vector summing, described control circuit comprises the signal input unit being connected, operation amplifier unit, filter unit and signal output unit, 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.
2. Vacuity of Vacuum Circuit Breakers on-line monitoring system as claimed in claim 1, it is characterized in that: described signal input unit comprises three described reception subelements that receive respectively electric field probe induced signal, described each reception subelement comprises respectively capacitor C 408, C409 and C410 and corresponding resistance R 422A, R422B and the R422C connecting on it, and described three reception subelements are connected in parallel on described signal computing unit.
3. 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 being connected with described operational amplifier U400A, R423, R407 and capacitor C 411, C406, the induced signal that described operational amplifier U400A receives three described reception subelements inputs to described filter unit after amplifying when carrying out vector summing.
4. 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, 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.
5. Vacuity of Vacuum Circuit Breakers on-line monitoring system as claimed in claim 1, it is characterized in that: described in each, on electric field probe, all there is a sensor circuit, described sensor circuit is responded to described sensor circuit and is comprised signal gathering unit, signal condition unit and signal conversion unit, described signal gathering unit gathers AC power frequency potential change and the high-frequency impulse current potential change information on the radome of described vacuum interrupter, after described signal condition unit carries out balance computing, inputs described signal conversion unit.
6. Vacuity of Vacuum Circuit Breakers on-line monitoring system as claimed in claim 5, it is characterized in that: described signal gathering unit comprises metal substrate J1, the J3 being 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 the redistribution of metal substrate electric lotus, by the voltage on Detection capacitance C1, can reflect the variation of current potential on radome.
7. Vacuity of Vacuum Circuit Breakers on-line monitoring system as claimed in claim 5, is characterized in that: described signal condition unit comprises capacitor C 2, C3, C5, C6, C7, resistance R 2, R3, the R6 being connected.
8. Vacuity of Vacuum Circuit Breakers on-line monitoring system as claimed in claim 5, 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 being 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320497088.3U CN203491185U (en) | 2013-08-14 | 2013-08-14 | Vacuum degree on-line monitoring system of vacuum circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320497088.3U CN203491185U (en) | 2013-08-14 | 2013-08-14 | Vacuum degree on-line monitoring system of vacuum circuit breaker |
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| Publication Number | Publication Date |
|---|---|
| CN203491185U true CN203491185U (en) | 2014-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320497088.3U Expired - Lifetime CN203491185U (en) | 2013-08-14 | 2013-08-14 | Vacuum degree on-line monitoring system of vacuum circuit breaker |
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| CN (1) | CN203491185U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103413721A (en) * | 2013-08-14 | 2013-11-27 | 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 |
| EP3098830A1 (en) * | 2015-05-28 | 2016-11-30 | Schneider Electric Industries SAS | Device for monitoring partial discharges in an electrical network |
-
2013
- 2013-08-14 CN CN201320497088.3U patent/CN203491185U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103413721A (en) * | 2013-08-14 | 2013-11-27 | 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 |
| CN103413721B (en) * | 2013-08-14 | 2015-09-02 | 北京科锐配电自动化股份有限公司 | Vacuity of Vacuum Circuit Breakers on-line monitoring system |
| 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 |
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