CN105510676A - Small-current signal monitoring device for high-voltage switchgear - Google Patents
Small-current signal monitoring device for high-voltage switchgear Download PDFInfo
- Publication number
- CN105510676A CN105510676A CN201610012611.7A CN201610012611A CN105510676A CN 105510676 A CN105510676 A CN 105510676A CN 201610012611 A CN201610012611 A CN 201610012611A CN 105510676 A CN105510676 A CN 105510676A
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- monitoring device
- module
- switch gear
- tension switch
- control module
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
-
- 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
- G01R31/3271—Testing of circuit interrupters, switches or circuit-breakers of high voltage or medium voltage devices
- G01R31/3272—Apparatus, systems or circuits therefor
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Arrangements For Transmission Of Measured Signals (AREA)
Abstract
The invention relates to a small-current signal monitoring device for a high-voltage switchgear. The small-current signal monitoring device comprises a control module, a current acquisition module, a dormancy awakening triggering circuit and a wireless transmission module, wherein the current acquisition module is used for acquiring a current of a breaking and closing coil in the high-voltage switchgear; the current acquisition module is connected with the control module; a signal output end of the current acquisition module is further connected with an input end of the dormancy awakening triggering circuit; an output end of the dormancy awakening triggering circuit is connected with a corresponding port of the control module; the control module is connected with the wireless transmission module. Wireless transmission of a current signal is realized by using the wireless transmission module, so that investment cost of a cable is reduced; the wireless transmission is adopted so that a current signal is prevented from being electromagnetically interfered and the reliability of the current signal is guaranteed. With the adoption of the dormancy awakening triggering circuit, the monitoring device can enter a low-power-consumption state without the need of power consumption so that electric energy is saved.
Description
Technical field
The present invention relates to a kind of high-tension switch gear small area analysis signal monitoring device, relate to high-tension switch gear performance monitoring field.
Background technology
At present, domesticly wideling popularize Diagnostic Examination And Repair of Electric Power Facilities work, high-tension switch gear is as the important element of electric system, and its equipment dependability has vital impact to Operation of Electric Systems reliability.In high-tension switch gear isolating switch divide-shut brake coil current waveform in containing a lot of information, reflection electromagnet itself and locking a door of controlling or valve and the working condition of chain contact in actuating process, if motion unshakable in one's determination is with or without the situation of clamping stagnation, dropout, release energy machine tool load change, the state of coil is (as whether resistance is normal, whether blow), what be connected with push rod unshakable in one's determination locks a door and the state of valve.
In prior art, conventional detection mode is: adopt the divide-shut brake coil current signal of small electric current sensor to isolating switch to gather, then be transferred in monitoring device, carry out signal digital, realize storage and the analysis of current waveform, and by data cable, current signal is exported to the Surveillance center of far-end.But because there are certain distance in monitoring device and Surveillance center, the connection of middle employing cable is easily subject to electromagnetic interference (EMI), makes the current waveform of collection be interfered.
Summary of the invention
The object of this invention is to provide a kind of high-tension switch gear small area analysis signal monitoring device, in order to solve the problem that existing data transfer mode easily makes the current signal collected be interfered.
For achieving the above object, the solution of the present invention comprises a kind of high-tension switch gear small area analysis signal monitoring device, comprise control module, current acquisition module, dormancy awakening trigger circuit and wireless transport module, described current acquisition module is for gathering the electric current in high-tension switch gear in divide-shut brake coil, and the signal output part of described current acquisition module connects the collection signal input end of described control module; The signal output part of described current acquisition module also connects the input end of described dormancy awakening trigger circuit, and the output terminal of described dormancy awakening trigger circuit connects port corresponding to described control module; Described control module connects described wireless transport module.
Described dormancy awakening trigger circuit comprise a comparer, the output signal of described current acquisition module is input to one of them input end of described comparer after being converted to corresponding voltage signal, another input end of described comparer is for inputting the reference voltage of setting, and the output terminal of described comparer connects the interruptive port of described control module.
Described wireless transport module is 4G communication module.
Described monitoring device also comprises serial communication modular, and described serial communication modular is connected with described control module.
Described monitoring device also comprises A/D modular converter, and the signal output part of described current acquisition module connects the collection signal input end of described control module by described A/D modular converter.
Described monitoring device also comprises filtering conditioning module, and the signal output part of described current acquisition module connects described A/D modular converter by described filtering conditioning module.
Described monitoring device also comprises data memory module, and described data memory module is connected with described control module.
Described control module is single-chip microcomputer.
Described monitoring device also comprises one for providing the power supply of electric energy for each module.
Described current detection module is Hall current sensor.
In current signal monitoring device provided by the invention, utilize wireless transport module to realize the wireless transmission of current signal, not only save the input cost of cable, and, use wireless transmission to avoid current signal and be subject to electromagnetic interference (EMI), ensure that the reliability of current signal.And adopt dormancy awakening trigger circuit, when current signal is more weak, now high-tension switch gear is without mode of operation, the correlation module that dormancy awakening trigger circuit control in monitoring device is in dormant state, i.e. low power consumpting state; Only have when high-tension switch gear is at operating state, monitoring device just normally works, and this mode can make monitoring device when entering low power consumpting state without the need to when power consumption, has saved electric energy.So, this monitoring device can realize collection and the process of high-tension switch gear status information easily, can the real-time information of real-time analysis high-tension switch gear, realize equipment fault early-warning early, the loss because equipment failure causes can be reduced to a certain extent.
Accompanying drawing explanation
Fig. 1 is the structural representation of high-tension switch gear small area analysis signal monitoring device;
Fig. 2 is the circuit diagram of dormancy awakening trigger circuit.
Embodiment
The invention provides a kind of high-tension switch gear small area analysis signal monitoring device, comprise control module, current acquisition module, dormancy awakening trigger circuit and wireless transport module, current acquisition module for gathering the electric current in high-tension switch gear in divide-shut brake coil, the collection signal input end of the signal output part link control module of current acquisition module; The sampling of dormancy awakening trigger circuit connects current acquisition module, control linkage control module; Control module communication connection wireless transport module.
As a specific embodiment, high-tension switch gear is isolating switch; Small area analysis signal in current acquisition module acquires circuit-breaker switching on-off control coil, current acquisition module is Hall current sensor, can gather small area analysis signal; Control module is single-chip microcomputer, as shown in Figure 1.In addition, in order to detect the current signal in divide-shut brake control coil more exactly, multiple Hall current mutual inductor can be used simultaneously to detect the electric current in this control coil, as shown in Figure 1, use three mutual inductors to detect.Certainly, the present invention is not limited to above-mentioned embodiment.
This monitoring device is arranged on the spot at primary cut-out place, between the two not without the need to longer stube cable, ensure that the data interference suffered when transmitting is less; And, this monitoring device owing to installing on the spot, so, use battery power, battery is that the ingredient in this monitoring device is powered; Utilize powered battery can also avoid interference signal to be impacted normal operation of sensor by power lead coupling scheme.
In wireless transmission process, electromagnetic interference (EMI) is reduced further in order to current signal can be made, this wireless transport module uses advanced 4G communication module, namely the 4th third-generation mobile communication technology, is the mainstream technology of current public mobile communications network, has stronger transmission reliability.By means of 4G technology, the real time remote that can be realized data by mobile client is mutual, realizes equipment state Real-Time Monitoring easily and analyzes judgement, for Diagnostic Examination And Repair of Electric Power Facilities provides strong technical support.
As shown in Figure 2, dormancy awakening trigger circuit comprise comparer U1, VIN end is the signal output part of one of them Hall current sensor, connection line between VIN end and ground is gone here and there and is provided with divider resistance R24 and R26, tie point between divider resistance R24 and R26, namely dividing point is connected to the in-phase input end of comparer U1.Go here and there successively between comparative voltage LB+ and ground and be provided with resistance R23 and stabilivolt D7, tie point between resistance R23 and stabilivolt D7 is connected to the inverting input of comparer U1, the comparative voltage of the inverting input being input to comparer U1 can be made to stablize by the effect of stabilivolt D7.The output terminal of comparer U1 connects the interruption control port on single-chip microcomputer, and the output signal of comparer U1 is exactly the working state control signal of single-chip microcomputer, is the interrupt trigger signal of single-chip microcomputer work or dormancy.
As a specific embodiment, the signal output part of this Hall current sensor is connected to the input end of A/D modular converter by a filtering conditioning circuit module, the output terminal of A/D modular converter is connected to the collection signal input end on single-chip microcomputer.The simulating signal of Hall current sensor after filtering after modulate circuit, then becomes digital signal through A/D modular converter, realizes the digitizing of collection signal.
In addition, single-chip microcomputer is connected with a data memory module, for storing the data message that single-chip microcomputer receives, facilitates follow-up data preparation and data call.Single chip communication is connected with a serial communication modular.
Each ingredient in above-mentioned monitoring device all can be set directly in the mechanism case of isolating switch, realizes integrated design.
This monitoring device, before installation and operation, inputs correlation parameter by serial communication modular to single-chip microcomputer with PC, and these parameters are used for setting the work in every parameter of sensor, mainly comprise activation threshold value, sampling rate etc.; And by serial ports, normalized current waveform can be inputted, be stored in device, can contrast with the data waveform collected, analyze the waveform collected and whether there is exception; And corresponding SIM card is installed, communicate for 4G.
Utilize dormancy awakening trigger circuit realize the divide-shut brake coil of single-chip microcomputer in isolating switch do not work (namely coil current is too small) time be dormant state.Detailed process is: when the electric current in coil is too small, the voltage that resistance R26 shares at two ends is less than the voltage on stabilivolt D7, comparer U1 output low level, and the signal that single-chip microcomputer exports according to comparer U1 controls, make itself to enter dormant state, i.e. low power consumpting state; When the electric current in coil reaches certain value, when namely exceeding setting threshold value, the voltage that resistance R26 shares at two ends is greater than the voltage on stabilivolt D7, and comparer U1 exports high level, the signal that single-chip microcomputer exports according to comparer U1 controls, and makes itself to enter normal operating conditions; After data acquisition, storage and transmitting-receiving, if coil current returns to below threshold value, single-chip microcomputer enters low power consumpting state automatically, and this mode effectively can extend service time of battery.
Single-chip microcomputer is in normal operating conditions process, and Hall current sensor gathers the current analog signal on coil, and this simulating signal after filtering after modulate circuit, then becomes digital signal through A/D modular converter, and inputs to single-chip microcomputer.In addition, single-chip microcomputer reads clock circuit signal, digital quantity signal joining day label is carried out preliminary arrangement, then, deposits in data memory module.Then, by 4G communication module, the current waveform information collected is sent to the mobile terminal of assigned ip, completes current monitoring.Wherein, isolating switch often completes single job, and the 4G communication module of device just sends corresponding current waveform information from the mobile terminal of trend assigned ip, and mobile terminal is after receiving shape information, analyzing and processing is carried out to information, display analysis result and maintenance suggestion etc.
In above-described embodiment, give a kind of physical circuit of dormancy awakening trigger circuit, as other embodiment, dormancy awakening trigger circuit can also have other circuit structure, based on principle of work identical with the principle of work of the circuit in above-described embodiment.
Be presented above concrete embodiment, but the present invention is not limited to described embodiment.Basic ideas of the present invention are above-mentioned basic scheme, and for those of ordinary skill in the art, according to instruction of the present invention, designing the model of various distortion, formula, parameter does not need to spend creative work.The change carried out embodiment without departing from the principles and spirit of the present invention, amendment, replacement and modification still fall within the scope of protection of the present invention.
Claims (10)
1. a high-tension switch gear small area analysis signal monitoring device, it is characterized in that, comprise control module, current acquisition module, dormancy awakening trigger circuit and wireless transport module, described current acquisition module is for gathering the electric current in high-tension switch gear in divide-shut brake coil, and the signal output part of described current acquisition module connects the collection signal input end of described control module; The signal output part of described current acquisition module also connects the input end of described dormancy awakening trigger circuit, and the output terminal of described dormancy awakening trigger circuit connects port corresponding to described control module; Described control module connects described wireless transport module.
2. high-tension switch gear small area analysis signal monitoring device according to claim 1, it is characterized in that, described dormancy awakening trigger circuit comprise a comparer, the output signal of described current acquisition module is input to one of them input end of described comparer after being converted to corresponding voltage signal, another input end of described comparer is for inputting the reference voltage of setting, and the output terminal of described comparer connects the interruptive port of described control module.
3. high-tension switch gear small area analysis signal monitoring device according to claim 1, is characterized in that, described wireless transport module is 4G communication module.
4. high-tension switch gear small area analysis signal monitoring device according to claim 1, it is characterized in that, described monitoring device also comprises serial communication modular, and described serial communication modular is connected with described control module.
5. high-tension switch gear small area analysis signal monitoring device according to claim 1, it is characterized in that, described monitoring device also comprises A/D modular converter, and the signal output part of described current acquisition module connects the collection signal input end of described control module by described A/D modular converter.
6. high-tension switch gear small area analysis signal monitoring device according to claim 5, it is characterized in that, described monitoring device also comprises filtering conditioning module, and the signal output part of described current acquisition module connects described A/D modular converter by described filtering conditioning module.
7. high-tension switch gear small area analysis signal monitoring device according to claim 1, it is characterized in that, described monitoring device also comprises data memory module, and described data memory module is connected with described control module.
8. high-tension switch gear small area analysis signal monitoring device according to claim 1, is characterized in that, described control module is single-chip microcomputer.
9. high-tension switch gear small area analysis signal monitoring device according to claim 1, is characterized in that, described monitoring device also comprises one for providing the power supply of electric energy for each module.
10. high-tension switch gear small area analysis signal monitoring device according to claim 1, is characterized in that, described current detection module is Hall current sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610012611.7A CN105510676A (en) | 2016-01-08 | 2016-01-08 | Small-current signal monitoring device for high-voltage switchgear |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610012611.7A CN105510676A (en) | 2016-01-08 | 2016-01-08 | Small-current signal monitoring device for high-voltage switchgear |
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| CN105510676A true CN105510676A (en) | 2016-04-20 |
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| CN201610012611.7A Pending CN105510676A (en) | 2016-01-08 | 2016-01-08 | Small-current signal monitoring device for high-voltage switchgear |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106959637A (en) * | 2017-03-23 | 2017-07-18 | 国家电网公司 | A kind of high-tension switch gear and its mechanical property monitoring device |
| CN107121645A (en) * | 2017-03-23 | 2017-09-01 | 国家电网公司 | A kind of high-tension switch gear and electrical power monitoring device |
| CN107505496A (en) * | 2017-09-28 | 2017-12-22 | 北京索弗电气科技有限公司 | A kind of current detector |
| CN111929493A (en) * | 2020-08-24 | 2020-11-13 | 通号(北京)轨道工业集团有限公司轨道交通技术研究院 | Current acquisition equipment and circuit monitoring system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106959637A (en) * | 2017-03-23 | 2017-07-18 | 国家电网公司 | A kind of high-tension switch gear and its mechanical property monitoring device |
| CN107121645A (en) * | 2017-03-23 | 2017-09-01 | 国家电网公司 | A kind of high-tension switch gear and electrical power monitoring device |
| CN106959637B (en) * | 2017-03-23 | 2019-12-27 | 国家电网公司 | High-voltage switch equipment and mechanical characteristic monitoring device thereof |
| CN107505496A (en) * | 2017-09-28 | 2017-12-22 | 北京索弗电气科技有限公司 | A kind of current detector |
| CN111929493A (en) * | 2020-08-24 | 2020-11-13 | 通号(北京)轨道工业集团有限公司轨道交通技术研究院 | Current acquisition equipment and circuit monitoring system |
| CN111929493B (en) * | 2020-08-24 | 2023-08-08 | 北京铁路信号有限公司 | Current acquisition equipment and circuit monitoring system |
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| CB03 | Change of inventor or designer information |
Inventor after: Song Yakai Inventor after: Li Shaohua Inventor after: Gao Qunwei Inventor after: Zhang Wentao Inventor after: Jia Gengfeng Inventor after: Zhang Yiming Inventor after: Han Guohui Inventor after: Yu Tongwei Inventor after: Guo Yujing Inventor after: Ge Weichun Inventor after: Lin Shengjun Inventor after: Jiang Xiaoxu Inventor after: Lu Yan Inventor before: Song Yakai Inventor before: Gao Qunwei Inventor before: Zhang Wentao Inventor before: Jia Gengfeng Inventor before: Zhang Yiming Inventor before: Han Guohui Inventor before: Yu Tongwei Inventor before: Guo Yujing Inventor before: Lin Shengjun Inventor before: Jiang Xiaoxu Inventor before: Lu Yan Inventor before: Li Shaohua |
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Application publication date: 20160420 |
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