CN203839960U - Reactive compensation intelligent combination switch having current detection function - Google Patents
Reactive compensation intelligent combination switch having current detection function Download PDFInfo
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- CN203839960U CN203839960U CN201420171206.6U CN201420171206U CN203839960U CN 203839960 U CN203839960 U CN 203839960U CN 201420171206 U CN201420171206 U CN 201420171206U CN 203839960 U CN203839960 U CN 203839960U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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Abstract
The utility model discloses a reactive compensation intelligent combination switch having the current detection function. The reactive compensation intelligent combination switch comprises a three-phase voltage detection circuit, a three-phase load detection circuit, a zero-cross detection and thyristor drive circuit, a relay control circuit, a thyristor and relay detection circuit, a current detection circuit, and a CPU intelligent detecting and processing circuit. Through the current detection circuit, the combination switch and power capacitors can be effectively protected, and the combination switch and the power capacitors will not be damaged due to overcurrent.
Description
[technical field]
The utility model belongs to power transmission and distribution technical field, particularly a kind of Intelligent composite switch with reactive compensation with current sense function.
[background technology]
In order to improve grid power factor, reduce grid loss, power transformation in one's power power distribution station all to carry out reactive power compensation, general by the mode of electrical network shunt-wound capacitance device, according to the variation of load number and character, change in time the capacity of compensation condenser, to guarantee the stabilization of power grids.In prior art, mainly with combination switch, carry out operating passing zero capacitor, but the combination switch using is at present a lot of, on-the-spot electric current is unstable or harmonic wave damages compared with causing greatly combination switch itself and power capacitor overcurrent, when more serious, can cause field accident.
[summary of the invention]
For the problems referred to above of the prior art, the utility model provides a kind of Intelligent composite switch with reactive compensation with current sense function, by increasing current detection circuit, guarantees product reliability of operation, can be widely used in the occasion of reactive power compensation.
An Intelligent composite switch with reactive compensation with current sense function, comprising:
Three-phase voltage testing circuit, sends into CPU Intelligent Measurement treatment circuit for the three-phase voltage of input being converted into digital signal;
Threephase load testing circuit, sends into CPU Intelligent Measurement treatment circuit for the threephase load information of input is converted into digital signal;
Zero passage detection and thyristor driving circuit, for detection of the zero passage detection of each phase contact of circuit, and drive thyristor;
Control relay circuit, for disconnection and the closure of control relay;
Current detection circuit, for detection of by the size of current of relay;
Thyristor and relay test circuit, abnormal for detection of " thyristor driving circuit " and " control relay circuit ".
CPU Intelligent Measurement treatment circuit, judges whether normal or three-phase electricity balance whether of three-phase voltage for the digital signal of sending into according to three-phase voltage testing circuit; The digital signal of sending into according to threephase load testing circuit judges that whether threephase load is normal; To making complete monitoring before and after thyristor driving circuit and control relay circuit action; Whether the digital signal judgement of sending into according to current detection circuit is normal by the size of current of relay, and feeds back to output.
A kind of preferred version is: by internal current instrument transformer and corresponding electric circuit inspection thereof by the electric current on relay.
Further preferred version is: when CPU sends closing relay signal, disconnect after thyristor, " current detection circuit " flows through detection the size of current of relay and result is changed into digital signal and be input to CPU and process.If testing result is in normal range (NR), CPU does not send alarm signal; If testing result is zero, explanation is fallen to carry, and CPU sends and carries alarm signal; If testing result overrun, illustrates current overload, CPU sends overload-alarm signal.
[accompanying drawing explanation]
Fig. 1 is a kind of Intelligent composite switch with reactive compensation circuit structure diagram with current sense function;
Fig. 2 is the current detection circuit structure chart in Intelligent composite switch with reactive compensation of the present utility model.
[embodiment]
Below in conjunction with accompanying drawing of the present utility model and concrete execution mode, the technical solution of the utility model is clearly and completely described.
As shown in Figure 1, Intelligent composite switch with reactive compensation with current sense function of the present utility model comprises: three-phase voltage testing circuit, threephase load testing circuit, zero passage detection and thyristor driving circuit, control relay circuit, thyristor and relay test circuit, current detection circuit, and CPU Intelligent Measurement treatment circuit.
Three-phase voltage testing circuit is converted into digital signal by the A of input, B, C three-phase voltage, and sends into CPU Intelligent Measurement treatment circuit, and CPU Intelligent Measurement treatment circuit judge that according to the digital signal sent into whether normally or three-phase electricity balance whether three-phase voltage.
Threephase load testing circuit is converted into digital signal by the threephase load information of input and sends into CPU Intelligent Measurement treatment circuit, and CPU Intelligent Measurement treatment circuit judges that according to the digital signal of sending into whether threephase load is normal.
Thyristor and relay test circuit are used for detecting the remarkable action situation of " thyristor driving circuit " and " control relay circuit ".
For solve in prior art due to on-the-spot electric current is unstable or harmonic wave compared with causing that greatly combination switch itself and power capacitor overcurrent damage, the utility model has increased a current detection circuit newly, for detection of flowing through the size of current of relay and result being changed into digital signal, is input to CPU and processes and send corresponding feedback signal.
CPU Intelligent Measurement treatment circuit is to making complete monitoring before and after thyristor driving circuit and control relay circuit action.
Testing result indication is indication testing result in real time.
As shown in Figure 2, the utility model is detected by the size of current on relay and result is changed into digital signal by current detection circuit and is input to CPU and processes.If testing result is in normal range (NR), CPU does not send alarm signal; If testing result is zero, explanation is fallen to carry, and CPU sends and carries alarm signal; If testing result overrun, illustrates current overload, CPU sends overload-alarm signal.
The above; it is only embodiment of the present utility model; but protection range of the present utility model is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the utility model discloses; can expect easily changing or replacing, within all should being encompassed in protection range of the present utility model.
Claims (3)
1. with an Intelligent composite switch with reactive compensation for current sense function, comprising:
Three-phase voltage testing circuit, sends into CPU Intelligent Measurement treatment circuit for the three-phase voltage of input being converted into digital signal;
Threephase load testing circuit, sends into CPU Intelligent Measurement treatment circuit for the threephase load information of input is converted into digital signal;
Thyristor driving circuit, for detection of the zero passage detection of each phase contact of circuit, and drives thyristor;
Control relay circuit, for opening and closure of control relay;
Current detection circuit, for detection of the size of current that flows through relay;
Thyristor and relay test circuit, abnormal for detection of " thyristor driving circuit " and " control relay circuit ";
CPU Intelligent Measurement treatment circuit, judges whether normal or three-phase electricity balance whether of three-phase voltage for the digital signal of sending into according to three-phase voltage testing circuit; The digital signal of sending into according to threephase load testing circuit judges that whether threephase load is normal; To making complete monitoring before and after thyristor driving circuit and control relay circuit action; Whether the digital signal judgement of sending into according to current detection circuit is normal by the size of current of relay, and feeds back to output.
2. the Intelligent composite switch with reactive compensation with current sense function as claimed in claim 1, is characterized in that: by internal current instrument transformer and corresponding electric circuit inspection thereof by the electric current on relay.
3. the Intelligent composite switch with reactive compensation with current sense function as claimed in claim 1 or 2, it is characterized in that: when CPU sends closing relay signal, disconnect after thyristor, current detection circuit flows through detection the size of current of relay and result is changed into digital signal and is input to CPU and processes; If testing result is in normal range (NR), CPU does not send alarm signal; If testing result is zero, explanation is fallen to carry, and CPU sends and carries alarm signal; If testing result overrun, illustrates current overload, CPU sends overload-alarm signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420171206.6U CN203839960U (en) | 2014-04-04 | 2014-04-04 | Reactive compensation intelligent combination switch having current detection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420171206.6U CN203839960U (en) | 2014-04-04 | 2014-04-04 | Reactive compensation intelligent combination switch having current detection function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203839960U true CN203839960U (en) | 2014-09-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420171206.6U Expired - Fee Related CN203839960U (en) | 2014-04-04 | 2014-04-04 | Reactive compensation intelligent combination switch having current detection function |
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| Country | Link |
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| CN (1) | CN203839960U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109782053A (en) * | 2017-11-13 | 2019-05-21 | Tdk株式会社 | Power supply device |
-
2014
- 2014-04-04 CN CN201420171206.6U patent/CN203839960U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109782053A (en) * | 2017-11-13 | 2019-05-21 | Tdk株式会社 | Power supply device |
| CN109782053B (en) * | 2017-11-13 | 2021-03-16 | Tdk株式会社 | Power supply device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140917 Termination date: 20210404 |
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| CF01 | Termination of patent right due to non-payment of annual fee |