CN102394492A - Circuit breaker closing protection device and closing protection method - Google Patents
Circuit breaker closing protection device and closing protection method Download PDFInfo
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- CN102394492A CN102394492A CN2011103019453A CN201110301945A CN102394492A CN 102394492 A CN102394492 A CN 102394492A CN 2011103019453 A CN2011103019453 A CN 2011103019453A CN 201110301945 A CN201110301945 A CN 201110301945A CN 102394492 A CN102394492 A CN 102394492A
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Abstract
The invention discloses a circuit breaker closing protection device and a circuit breaker closing protection method. A central control unit is connected with a closing relay and an alarm relay and also connected with a circuit breaker. With the adoption of the structure and the method, the central control unit performs accurate sampling and control over the circuit breaker and the relays, so failure phenomena such as wrong tripping operation and the like at the moment of closing are effectively prevented, fast breaking of a short trouble can be ensured, the power supply reliability is greatly improved, and the protection device is small in volume, high in timed action accuracy, and large in breaking capacity and wiring mounting is easy to realize.
Description
Technical field:
The claimed technical scheme of the present invention relates to a kind of breaker closing protective device and guard method thereof.
Background technology:
In current electric power system; Circuit breaker is can close to close, carry and cut-off the electric current under the normal loop condition; And can close and close, in official hour, carry and cut-off the switching device that unusual loop condition comprises the electric current under the short circuit condition; The fault of divide-shut brake coil, closing contactor coil burnout often takes place in circuit breaker after carrying out closing operation or emergency stop valve trip.This has not only increased maintenance workload, has prolonged interruption duration, and serious also can cause electrical fire.Therefore, must increase protective device in case the generation of type fault here, be main at the switching-on controller of present switch cubicle with relay control mode, and cost is high, and accuracy is low, and fragile.
Summary of the invention:
The technical issues that need to address of the present invention are, provide a kind of breaker closing protective device and guard method thereof to reach accurately the purpose of accurately circuit breaker being protected to the deficiency of prior art.
For solving the problems of the technologies described above technical scheme of the present invention be; A kind of breaker closing protective device; The central control unit that comprises protective device, described central control unit is connected with alarm relay with closing relay, and described central control unit is connected with circuit breaker.
The model of the control chip of described central control unit is STC12C5204.
A kind of guard method of breaker closing protective device is characterized in that: described guard method comprises the following steps:
A) sampling step, the anti-jump signal and the input signal of the sampling circuit breaker output of central control unit;
B) signal processing step, central control unit carries out filtering and calibration to anti-jump signal and the input signal that collects;
C) determining step, the signal that central control unit will be handled and the rating number of setting compare;
D) controlled step, central control unit is controlled closing relay and alarm relay through the judged result of determining step.
Described controlled step, the magnitude of voltage of input signal surpasses 75% of load voltage value, and central control unit control closing relay carries out the closing contact closed procedure, breaks off behind the closed 100ms.
Described controlled step, the magnitude of voltage of input signal is lower than 75% of load voltage value, and central control unit control alarm relay carries out the closing contact closed procedure, and circulate between closed and disconnected in the alarm relay contact, and the intercycle is 500ms.
Described controlled step, the magnitude of voltage of input signal surpasses 75% of load voltage value, and central control unit receives anti-jump signal, and central control unit control closing relay breaks off.
Described controlled step, the closed and disconnected of closing relay 3 is interval greater than 20S.
A kind of breaker closing protective device and guard method thereof; Owing to adopt said structure and method; Central control unit is sampled accurately to circuit breaker and relay and is controlled, and the phenomena of the failure such as mistrip of the moment that prevents effectively to close a floodgate can be guaranteed the quick disjunction of short trouble again; Improved the reliability of power supply greatly, and this protective device advantages of small volume, regularly operation precision is high, breaking capacity is big, wiring is installed simple.
Description of drawings:
Below in conjunction with accompanying drawing and embodiment the present invention is explained further details:
Fig. 1 is a principle of the invention block diagram;
Fig. 2 is a flow chart of the present invention;
In Fig. 1,1, central control unit, 2, circuit breaker, 3, closing relay, 4, alarm relay.
Embodiment:
Shown in Fig. 1-2, a kind of breaker closing protective device comprises the central control unit 1 of protective device, and described central control unit 1 is connected with alarm relay 4 with closing relay 3, and described central control unit 1 is connected with circuit breaker 2.
The model of the control chip of described central control unit 1 is STC12C5204.
Central control unit 1 is controlled alarm relay 4 and closing relay 3 through input signal and anti-jump signal that collection circuit breaker 2 provides accurately, and circuit breaker 2 is protected.
A kind of guard method of breaker closing protective device is characterized in that: described guard method comprises the following steps:
A) sampling step, the anti-jump signal and the input signal of sampling circuit breaker 2 outputs of central control unit 1;
B) signal processing step, anti-jump signal and input signal that 1 pair of central control unit collects carry out filtering and calibration;
C) determining step, the signal that central control unit 1 will be handled and the rating number of setting compare;
D) controlled step, central control unit 1 is controlled closing relay 3 and alarm relay 4 through the judged result of determining step.
Described controlled step, the magnitude of voltage of input signal surpasses 75% of load voltage value, and central control unit control closing relay 3 carries out the closing contact closed procedure, breaks off behind the closed 100ms.
Described controlled step, the magnitude of voltage of input signal is lower than 75% of load voltage value, the central control unit 1 control alarm relay electric shock closed procedure that closes a floodgate, circulate between closed and disconnected in the alarm relay contact, and the intercycle is 500ms.
Described controlled step, the magnitude of voltage of input signal surpasses 75% of load voltage value, and central control unit receives anti-jump signal, and central control unit 1 control closing relay breaks off.
Described controlled step, the closed and disconnected of closing relay 3 is interval greater than 20S.
Central control unit 1 receives the input voltage of anti-jump signal and acquired signal, in control chip, carries out the AD conversion then, disturbs for preventing the signal in the electrical network; Control chip will carry out filtering and calibration, to guarantee the correctness of sampled voltage, judges the scope of magnitude of voltage subsequently; If magnitude of voltage is at 75% closing relay when above of the rated voltage electric shock closed procedure that closes a floodgate; Break off behind the closed 100ms, the magnitude of voltage of input signal is lower than 75% of load voltage value, and central control unit control alarm relay carries out the closing contact closed procedure; Circulate between closed and disconnected in the alarm relay contact, the intercycle is 500ms., closing time carries out the delayed alarm operation if surpassing set point; After closing a floodgate successfully for the first time, carrying out the remote signalling amount must judge, closes a floodgate and alarm operation if anti-jump signal is arranged then can not repeat, if there is not anti-jump signal; Then allow to repeat to close a floodgate and alarm operation; Be the danger of avoiding repeating to close a floodgate and bringing, take into account the function of circuit breaker reclosing again, be defined in and do not allow to repeat combined floodgate in the 20s.
Like Fig. 2 is flow chart of the present invention,
In step 110, initialization;
In step 111, signals collecting;
In step 112, the filtering of signal and calibration;
In step 113, judge whether the magnitude of voltage of input signal surpasses 75% of load voltage value, judged result gets into step 114 for being, and judged result gets into step 115 for not;
In step 114, closing relay output;
In step 115, alarm relay output;
In step 116, judged whether anti-jump signal input, judged result gets into step 117 for being, and judged result gets into step 118 for not;
In step 117, do not allow to repeat to close a floodgate;
In step 118, allow to repeat to close a floodgate;
After getting into step 118, return step 113 and judge voltage range;
In step 119, EP (end of program).
Claims (7)
1. breaker closing protective device; The central control unit (1) that comprises protective device; It is characterized in that: described central control unit (1) is connected with alarm relay (4) with closing relay (3), and described central control unit (1) is connected with circuit breaker (2).
2. a kind of breaker closing protective device according to claim 1 is characterized in that: the model of the control chip of described central control unit (1) is STC12C5204.
3. guard method according to the described breaker closing protective device of claim 1～2, it is characterized in that: described guard method comprises the following steps:
A) sampling step, the anti-jump signal and the input signal of sampling circuit breaker 2 outputs of central control unit 1;
B) signal processing step, anti-jump signal and input signal that 1 pair of central control unit collects carry out filtering and calibration;
C) determining step, the signal that central control unit 1 will be handled and the rating number of setting compare;
D) controlled step, central control unit 1 is controlled closing relay 3 and alarm relay 4 through the judged result of determining step.
4. the guard method of breaker closing protective device according to claim 3; It is characterized in that: described controlled step; The magnitude of voltage of input signal surpasses 75% of load voltage value; Central control unit control closing relay 3 carries out the closing contact closed procedure, breaks off behind the closed 100ms.
5. the guard method of breaker closing protective device according to claim 3; It is characterized in that: described controlled step; The magnitude of voltage of input signal is lower than 75% of load voltage value; The central control unit 1 control alarm relay electric shock closed procedure that closes a floodgate, circulate between closed and disconnected in the alarm relay contact, and the intercycle is 500ms.
6. the guard method of breaker closing protective device according to claim 3; It is characterized in that: described controlled step; The magnitude of voltage of input signal surpasses 75% of load voltage value, and central control unit receives anti-jump signal, and central control unit 1 control closing relay breaks off.
7. the guard method of breaker closing protective device according to claim 3 is characterized in that: described controlled step, the closed and disconnected of closing relay 3 is interval greater than 20S.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103019453A CN102394492A (en) | 2011-09-29 | 2011-09-29 | Circuit breaker closing protection device and closing protection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103019453A CN102394492A (en) | 2011-09-29 | 2011-09-29 | Circuit breaker closing protection device and closing protection method |
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| CN102394492A true CN102394492A (en) | 2012-03-28 |
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| CN2011103019453A Pending CN102394492A (en) | 2011-09-29 | 2011-09-29 | Circuit breaker closing protection device and closing protection method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103066552A (en) * | 2012-12-28 | 2013-04-24 | 麦广宇 | Control method for avoiding false switching-on of breaker and circuit thereof |
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|---|---|---|---|---|
| JPS5396475A (en) * | 1977-01-31 | 1978-08-23 | Brush Switchgear | Method of and circuit for controlling vacuum circuit breaker |
| US4185208A (en) * | 1978-02-14 | 1980-01-22 | Westinghouse Electric Corp. | Anti-pump circuit breaker |
| CN201130844Y (en) * | 2007-11-28 | 2008-10-08 | 上海精益电器厂有限公司 | Automatic reclosing control apparatus for low-voltage breaker |
| CN101414743A (en) * | 2008-11-28 | 2009-04-22 | 天津市百利电气有限公司 | Electronic less/over-voltage protective device for low-voltage circuit breaker and control method thereof |
| CN101447660A (en) * | 2007-11-28 | 2009-06-03 | 上海精益电器厂有限公司 | Automatic reclosing controller of general low-voltage circuit breaker |
| CN101505053A (en) * | 2008-08-07 | 2009-08-12 | 珠海许继电气有限公司 | User demarcation circuit breaker set apparatus and protection method |
| CN202260421U (en) * | 2011-09-29 | 2012-05-30 | 安徽鑫龙电器股份有限公司 | Closing protection device for circuit breaker |
-
2011
- 2011-09-29 CN CN2011103019453A patent/CN102394492A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5396475A (en) * | 1977-01-31 | 1978-08-23 | Brush Switchgear | Method of and circuit for controlling vacuum circuit breaker |
| US4185208A (en) * | 1978-02-14 | 1980-01-22 | Westinghouse Electric Corp. | Anti-pump circuit breaker |
| CN201130844Y (en) * | 2007-11-28 | 2008-10-08 | 上海精益电器厂有限公司 | Automatic reclosing control apparatus for low-voltage breaker |
| CN101447660A (en) * | 2007-11-28 | 2009-06-03 | 上海精益电器厂有限公司 | Automatic reclosing controller of general low-voltage circuit breaker |
| CN101505053A (en) * | 2008-08-07 | 2009-08-12 | 珠海许继电气有限公司 | User demarcation circuit breaker set apparatus and protection method |
| CN101414743A (en) * | 2008-11-28 | 2009-04-22 | 天津市百利电气有限公司 | Electronic less/over-voltage protective device for low-voltage circuit breaker and control method thereof |
| CN202260421U (en) * | 2011-09-29 | 2012-05-30 | 安徽鑫龙电器股份有限公司 | Closing protection device for circuit breaker |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103066552A (en) * | 2012-12-28 | 2013-04-24 | 麦广宇 | Control method for avoiding false switching-on of breaker and circuit thereof |
| CN103066552B (en) * | 2012-12-28 | 2015-01-07 | 麦广宇 | Control method for avoiding false switching-on of breaker and circuit thereof |
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Application publication date: 20120328 |