CN203054194U - Monitoring system for breaking coil and closing coil of breaker - Google Patents

Monitoring system for breaking coil and closing coil of breaker Download PDF

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Publication number
CN203054194U
CN203054194U CN 201220749874 CN201220749874U CN203054194U CN 203054194 U CN203054194 U CN 203054194U CN 201220749874 CN201220749874 CN 201220749874 CN 201220749874 U CN201220749874 U CN 201220749874U CN 203054194 U CN203054194 U CN 203054194U
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China
Prior art keywords
circuit
coil
balance type
magnetic balance
type hall
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CN 201220749874
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Chinese (zh)
Inventor
黄慧红
陆国俊
李爱波
杨柳
张显聪
何勇
汪民
李徽胜
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GUANGZHOU NANFANG POWER GROUP ELECTRICAL APPLIANCE CO Ltd
Guangzhou Power Supply Bureau Co Ltd
Original Assignee
GUANGZHOU NANFANG POWER GROUP ELECTRICAL APPLIANCE CO Ltd
Guangzhou Power Supply Bureau Co Ltd
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Publication of CN203054194U publication Critical patent/CN203054194U/en
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Abstract

The utility model provides a monitoring system for a breaking coil and a closing coil of a breaker, and the system comprises the breaker, magnetic balance type Hall current voltage sensors and a signal analyzing device; and a breaking coil circuit and a closing coil circuit of the breaker are connected with the magnetic balance type Hall current voltage sensors, and the magnetic balance type Hall current voltage sensors are connected with the signal analyzing device. The monitoring system monitors current and voltage of the breaking coil and the closing coil of the breaker, and is higher in detection precision, shorter in response time, and better in non-linearity.

Description

Circuit-breaker switching on-off coil monitoring system
Technical field
The utility model relates to a kind of circuit-breaker switching on-off coil monitoring system.
Background technology
At present, most of circuit-breaker switching on-off coil currents do not have monitoring, monitor perhaps that error is big, sensitivity is low.And circuit-breaker switching on-off coil current waveform is the important evidence of analyzing the circuit breaker operation mechanism mechanical property, contain a lot of information in the current waveform of circuit-breaker switching on-off magnet coil, can reflect electromagnet itself and locking a door or valve and the working condition of chain contact in the actuating process of controlling, have or not clamping stagnation as motion unshakable in one's determination, the situation of dropout, release energy machine tool load change, whether the state of coil is (normal as resistance, whether blow), what be connected with push rod unshakable in one's determination locks a door and the state of valve.By the monitoring to the circuit-breaker switching on-off coil current, can calculate start-up time, pull bar run duration, coil electrify time of operating mechanism etc., in conjunction with the parameter area of isolating switch self, can judge whether isolating switch running statuses such as jumping steathily, malfunction, tripping take place simultaneously.Therefore, be reference with circuit-breaker switching on-off current waveform under the normal condition, the divide-shut brake situation under the malfunction is carried out fingerprint comparison, can reach the purpose of fault detect.
Isolating switch is in the divide-shut brake process, and coil current is the DC simulation signal, and changes fast, non-linear.Conventional current transformer can't be measured direct current signal, domestic most of on-Line Monitor Device is generally used straight inspection formula Hall current sensor when gathering the circuit-breaker switching on-off coil current, this sensor accuracy is not high, the response time long, temperature is floated greatly, nonlinearity is poor, can accurately not reflect the variation of electric current.
The utility model content
Based on this, the utility model provides a kind of circuit-breaker switching on-off coil monitoring system, and higher to the output current monitoring accuracy of isolating switch branch, closing coil, the response time is shorter, and nonlinearity is better.
A kind of circuit-breaker switching on-off coil monitoring system comprises isolating switch, wherein also comprises magnetic balance type Hall current voltage sensor, signal analysis device;
Connect described magnetic balance type Hall current voltage sensor on the branch of described isolating switch, the closing coil circuit,
Described magnetic balance type Hall current voltage sensor is connected to signal analysis device.
Therein among embodiment, comprise two described magnetic balance type Hall current voltage sensors, one of them described magnetic balance type Hall current voltage sensor is connected on the switching winding circuit of described isolating switch, another described magnetic balance type Hall current voltage sensor is connected on the closing coil circuit of described isolating switch, is used for respectively the switching winding circuit of primary cut-out and electric current and the voltage of closing coil circuit being monitored.
Among embodiment, described signal analysis device comprises A/D change-over circuit, small echo signal processing circuit therein; Described magnetic balance type Hall current voltage sensor is connected with described A/D change-over circuit, and described A/D change-over circuit is connected with described small echo signal processing circuit; Be used for the output signal of magnetic balance type Hall current voltage sensor is handled, the waveform of electric current and voltage is reflected accurately.
Above-mentioned circuit-breaker switching on-off coil monitoring system utilizes magnetic balance type Hall current voltage sensor to gather electric current and the voltage signal of circuit-breaker switching on-off coil, the measuring accuracy of sensor<± 0.5%, response time≤1 μ S, nonlinearity<0.2%, its precision is higher, response time is shorter, and nonlinearity is better, can reflect the variation of electric current and the voltage of circuit-breaker switching on-off coil more accurately.
Description of drawings
Fig. 1 is the utility model circuit-breaker switching on-off coil monitoring system structural representation in one embodiment.
Fig. 2 is the structural representation of magnetic balance type Hall current voltage sensor among Fig. 1.
Fig. 3 is the circuit structure diagram that signal analysis device connects magnetic balance type Hall current voltage sensor among Fig. 1.
Embodiment
Below in conjunction with embodiment and accompanying drawing the utility model is described in further detail, but embodiment of the present utility model is not limited thereto.
As shown in Figure 1, for the utility model circuit-breaker switching on-off coil monitoring system structural representation in one embodiment, comprise isolating switch 10, wherein also comprise magnetic balance type Hall current voltage sensor 20, signal analysis device 30;
Branch, closing coil circuit at isolating switch 10 connect described magnetic balance type Hall current voltage sensor 20;
Described magnetic balance type Hall current voltage sensor 20 is connected to signal analysis device 30;
The utility model adopts the magnetic balance type Hall current voltage sensor 20 of zero magnetic flux principle to gather electric current and the voltage signal of isolating switch 10 divide-shut brake coils, this sensor can measure short, temperature of various waveform electric currents and voltage and precision height, response time float little, nonlinearity good, can accurately kinetic current and the variation of voltage;
As shown in Figure 2, it is a kind of structural representation of magnetic balance type Hall current voltage sensor 20, the principle of magnetic balance type Hall current voltage sensor 20 is: former limit major loop has a measured current I 1, to produce magnetic flux Φ 1, the magnetic flux Φ 2 that the electric current I of being passed through by the secondary compensating coil 2 is produced compensates the back and keeps the magnetic balance state, hall device then is in the effect that detects zero magnetic flux all the time, so be called Hall magnetic balance type current/voltage sensor.This advanced person's principle modes is better than directly examining the formula principle modes, and outstanding advantage is fast and measuring accuracy height of response time, is specially adapted to the detection of small and weak electric current, thereby can accurately reacts the variation of circuit-breaker switching on-off coil current.
As can be seen from Figure 2: Φ 1=Φ 2
I1N1=I2N2
I2=NI/N2·I1
When offset current I2 flows through measuring resistance Rm, convert voltage at the Rm two ends, as sensor measurement voltage U 0 namely: U0=I2Rm.
In a preferred embodiment, native system comprises two described magnetic balance type Hall current voltage sensors 20, comprise two described magnetic balance type Hall current voltage sensors 20, one of them described magnetic balance type Hall current voltage sensor 20 is connected on switching winding 101 circuit of described isolating switch 10, another described magnetic balance type Hall current voltage sensor 20 is connected on closing coil 102 circuit of described isolating switch, is used for respectively switching winding 101 circuit of primary cut-out 10 and electric current and the voltage of closing coil 102 circuit being monitored.
In a preferred embodiment, described signal analysis device 30 comprises A/D change-over circuit 301 and small echo signal processing circuit 302;
Described magnetic balance type Hall current voltage sensor 20 is connected with described A/D change-over circuit 301, and described A/D change-over circuit 301 is connected with described small echo signal processing circuit 302;
In the present embodiment, be the circuit structure diagram after signal analysis device 30 connects described magnetic balance type Hall current voltage sensor 20 as shown in Figure 3, described signal analysis device 30 can adopt 32 bit CPUs (MB9BF610S) of Fujitsu, magnetic balance type Hall current voltage sensor 20 is connected with this signal analysis device 30, and the signal of gathering is exported in this device; This device can comprise A/D change-over circuit 301 and small echo signal processing circuit 302, A/D change-over circuit 301 is changed the back with current signal and is handled by small echo signal processing circuit 302, current waveform is reflected accurately, the principle of small echo signal processing circuit 302 is to adopt Wavelet packet signal extracting algorithm, it adopts window when variable, at the signal HFS, the time window narrow down, play the effect that high-frequency signal is amplified; And in the low frequency part of signal, the time window broaden again, frequency resolution that fully can adaptation signal has realized double action that signal is carried out the overall picture analysis and high-frequency signal is carried out partial analysis preferably, can diagnose the signal that is out of order rapidly;
The utility model utilizes magnetic balance type Hall current voltage sensor to gather electric current and the voltage of circuit-breaker switching on-off coil, the measuring accuracy of sensor<± 0.5%, response time≤1 μ S, nonlinearity<0.2%, its precision is higher, response time is shorter, and nonlinearity is better, can reflect electric current and the change in voltage of circuit-breaker switching on-off coil more accurately.
The above embodiment has only expressed several embodiment of the present utility model, and it describes comparatively concrete and detailed, but can not therefore be interpreted as the restriction to the utility model claim.Should be pointed out that for the person of ordinary skill of the art under the prerequisite that does not break away from the utility model design, can also make some distortion and improvement, these all belong to protection domain of the present utility model.Therefore, the protection domain of the utility model patent should be as the criterion with claims.

Claims (3)

1. a circuit-breaker switching on-off coil monitoring system comprises isolating switch, it is characterized in that, also comprises magnetic balance type Hall current voltage sensor, signal analysis device;
Connect described magnetic balance type Hall current voltage sensor on the branch of described isolating switch, the closing coil circuit,
Described magnetic balance type Hall current voltage sensor is connected to signal analysis device.
2. circuit-breaker switching on-off coil monitoring system according to claim 1, it is characterized in that, comprise two described magnetic balance type Hall current voltage sensors, one of them described magnetic balance type Hall current voltage sensor is connected on the switching winding circuit of described isolating switch, and another described magnetic balance type Hall current voltage sensor is connected on the closing coil circuit of described isolating switch.
3. circuit-breaker switching on-off coil monitoring system according to claim 1 is characterized in that, described signal analysis device comprises A/D change-over circuit, small echo signal processing circuit;
Described magnetic balance type Hall current voltage sensor is connected with described A/D change-over circuit, and described A/D change-over circuit is connected with described small echo signal processing circuit.
CN 201220749874 2012-12-31 2012-12-31 Monitoring system for breaking coil and closing coil of breaker Active CN203054194U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201220749874 CN203054194U (en) 2012-12-31 2012-12-31 Monitoring system for breaking coil and closing coil of breaker

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201220749874 CN203054194U (en) 2012-12-31 2012-12-31 Monitoring system for breaking coil and closing coil of breaker

Publications (1)

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CN203054194U true CN203054194U (en) 2013-07-10

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104793131A (en) * 2015-04-03 2015-07-22 国网山东省电力公司东营供电公司 Full working condition monitoring circuit for tripping coil and closing coil of circuit breaker
CN105891705A (en) * 2016-03-15 2016-08-24 国家电网公司 Detection system of a circuit breaker
CN106291351A (en) * 2016-09-20 2017-01-04 西安工程大学 Primary cut-out fault detection method based on convolutional neural networks algorithm
CN106814313A (en) * 2017-01-13 2017-06-09 天津大学 The intellectual faculties in breaker operator loop
CN106911121A (en) * 2017-04-21 2017-06-30 贵州电网有限责任公司 A kind of guard method of intelligent breaker closing coil protection device
CN109633428A (en) * 2018-12-14 2019-04-16 贵州电网有限责任公司 A kind of high-voltage circuit-breaker switching on-off coil fault detector

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104793131A (en) * 2015-04-03 2015-07-22 国网山东省电力公司东营供电公司 Full working condition monitoring circuit for tripping coil and closing coil of circuit breaker
CN105891705A (en) * 2016-03-15 2016-08-24 国家电网公司 Detection system of a circuit breaker
CN106291351A (en) * 2016-09-20 2017-01-04 西安工程大学 Primary cut-out fault detection method based on convolutional neural networks algorithm
CN106291351B (en) * 2016-09-20 2019-01-18 西安工程大学 High-voltage circuitbreaker fault detection method based on convolutional neural networks algorithm
CN106814313A (en) * 2017-01-13 2017-06-09 天津大学 The intellectual faculties in breaker operator loop
CN106814313B (en) * 2017-01-13 2019-05-17 天津大学 The intellectual faculties in breaker operator circuit
CN106911121A (en) * 2017-04-21 2017-06-30 贵州电网有限责任公司 A kind of guard method of intelligent breaker closing coil protection device
CN109633428A (en) * 2018-12-14 2019-04-16 贵州电网有限责任公司 A kind of high-voltage circuit-breaker switching on-off coil fault detector

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