CN101980349B - Control circuit of relay of microcomputer relay protection device and comprehensive measurement and control device - Google Patents
Control circuit of relay of microcomputer relay protection device and comprehensive measurement and control device Download PDFInfo
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- CN101980349B CN101980349B CN 201010273640 CN201010273640A CN101980349B CN 101980349 B CN101980349 B CN 101980349B CN 201010273640 CN201010273640 CN 201010273640 CN 201010273640 A CN201010273640 A CN 201010273640A CN 101980349 B CN101980349 B CN 101980349B
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- 238000005259 measurement Methods 0.000 title abstract 3
- 238000002955 isolation Methods 0.000 claims abstract description 18
- 239000003990 capacitor Substances 0.000 claims description 30
- 230000001681 protective effect Effects 0.000 claims description 26
- 230000015572 biosynthetic process Effects 0.000 claims description 19
- 238000003786 synthesis reaction Methods 0.000 claims description 19
- 230000005622 photoelectricity Effects 0.000 claims description 15
- 238000000034 method Methods 0.000 description 8
- 230000007257 malfunction Effects 0.000 description 6
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Abstract
The invention discloses a control circuit of a relay of a microcomputer relay protection device and a comprehensive measurement and control device, which comprises a pulse control switch, a negative voltage generating circuit and a photoelectric isolation control circuit, wherein the pulse control switch comprises two input pins and an output pin; one of the input pins is connected with a pulse-width modulation (PWM) signal generator, and the other input pin is connected with an input/output (I/O) signal generator; and the output pin of the pulse control switch is connected with the input end of the negative voltage generating circuit, and the output end of the negative voltage generating circuit is connected with the input end of the photoelectric isolation control circuit, and the output end of the photoelectric isolation control switch is connected with a relay coil. The control circuit solves the problem that the relay moves incorrectly during the power failure of the microcomputer relay protection device and the comprehensive measurement and control device and under the condition of strong on-spot interference.
Description
Technical field
The present invention relates in electric power system the relay of microcomputer protective relay device and synthesis observe and control device and leave control circuit.
Background technology
Known technology is in the traditional microcomputer protective relay device and synthesis observe and control device, and the mode that basically adopts IO mouth or data wire by single-chip microcomputer to latch is controlled the relay in the device by high or low level.Its shortcoming is: the IO mouth of single-chip microcomputer and data wire are in the indefinite state of state in the process of microcomputer protective relay device and synthesis observe and control device power on and off, cause relay misoperation; Install in the situation that interference ratio is larger at the scene, cause easily IO mouth and the data wire mistake of single-chip microcomputer, thereby cause relay misoperation.
Summary of the invention
Technical problem to be solved by this invention provides the control circuit of a kind of microcomputer protective relay device and synthesis observe and control device repeat circuit, solves the process middle outlet relay misoperation of power down on microcomputer protective relay device and synthesis observe and control device; In the very large situation of on-the-spot interference, the exit relay malfunction.
For solving the problems of the technologies described above, technical scheme of the present invention is: the control circuit of a kind of microcomputer protective relay device and synthesis observe and control device repeat circuit, comprise pulse control switch, circuit for generating negative voltage, photoelectricity isolation control circuit, described pulse control switch comprises two input pins, one output pin, wherein an input pin is connected with the pwm signal generator, and another input pin is connected with the I/O signal generator; Described pulse control switch output pin is connected with described circuit for generating negative voltage input, and described circuit for generating negative voltage output is connected with described photoelectricity isolation control circuit input, and described photoelectricity isolation control circuit output is connected with relay coil.By the input of pulse control switch control pwm signal, this circuit is as the ground floor protective circuit; After the pwm signal input that particular duty cycle is arranged, circuit for generating negative voltage is just exported the negative voltage that needs, and this circuit is as second layer protective circuit; After the input of photoelectricity isolation control circuit has the specific voltage input, optocoupler conducting, and then control relay action, this circuit is as the three-layer protection circuit; Above-mentioned three layers protective circuit has solved the process middle outlet relay misoperation of power down on microcomputer protective relay device and synthesis observe and control device, in the very large situation of on-the-spot interference, and the exit relay malfunction.
As improvement, in the described circuit for generating negative voltage, capacitor C 1 is connected rear with in parallel with the circuit of diode D2 differential concatenation by capacitor C 2 with diode D1 forward, input a after the parallel connection is connected with the output pin of described pulse control switch, output b after the parallel connection is connected with electrochemical capacitor C3 negative terminal, electrochemical capacitor C4 negative terminal, resistance R 1 respectively, described electrochemical capacitor C3 anode, the positive earth terminal of electrochemical capacitor C4; Be provided with a c between described capacitor C 1 and the diode D1, be connected with the output of circuit for generating negative voltage by wire L1 after some c and the diode D3 differential concatenation, be provided with a d between described capacitor C 2 and the diode D2, be connected with the output of circuit for generating negative voltage by wire L2 after some d and the diode D4 differential concatenation; Be provided with electrochemical capacitor C5, C6, C7, C8, diode D5, resistance R 2 between described wire L1 and the L2, described electrochemical capacitor C5, C6, C7, C8 negative terminal are connected with L1, and anode is connected with wire L2 and ground connection.
As improvement, described pwm signal generator is single-chip microcomputer, and described I/O signal generator is pulse signal generator.
As improvement, the input of described photoelectricity isolation control circuit comprises positive and negative end, described positive ending grounding, and negative terminal is connected with the circuit for generating negative voltage output.
The present invention compared with prior art, the beneficial effect that brings is:
1) microcomputer protective relay device and synthesis observe and control device exit relay power at device, in the power down process, not malfunction of exit relay in the larger situation of on-the-spot interference ratio;
2) in the situation of device normal operation, microcomputer protective relay device and synthesis observe and control device exit relay can fast and reliable move;
3) circuit structure is simple, economy, practicality.
Description of drawings
Fig. 1 is circuit diagram of the present invention.
Embodiment
The invention will be further described below in conjunction with Figure of description.
As shown in Figure 1, the control circuit of a kind of microcomputer protective relay device and synthesis observe and control device repeat circuit comprises pulse control switch 1, circuit for generating negative voltage 2, photoelectricity isolation control circuit 3.Described pulse control switch 1 comprises two input pin P1, P2, one output pin P3, wherein an input pin P1 is connected with the pwm signal generator, another input pin P2 is connected with the I/O signal generator, and described pulse control switch 1 output pin P3 is connected with described circuit for generating negative voltage 2 inputs.Described pwm signal generator is single-chip microcomputer, and described I/O signal generator is pulse signal generator, and pulse signal generator is the pulse of 10KHz.Described circuit for generating negative voltage 2 outputs are connected with the negative terminal of described photoelectricity isolation control circuit 3 inputs, the positive ending grounding of photoelectricity isolation control circuit 3 inputs, and photoelectricity isolation control circuit 3 outputs are connected with relay coil.
In the described circuit for generating negative voltage 2, capacitor C 1 is connected rear with in parallel with the circuit of diode D2 differential concatenation by capacitor C 2 with diode D1 forward, input a after the parallel connection is connected with the output pin of described pulse control switch 1, output b after the parallel connection is connected with electrochemical capacitor C3 negative terminal, electrochemical capacitor C4 negative terminal, resistance R 1 respectively, described electrochemical capacitor C3 anode, the positive earth terminal of electrochemical capacitor C4; Be provided with a c between described capacitor C 1 and the diode D1, be connected with the output of circuit for generating negative voltage 2 by wire L1 after some c and the diode D3 differential concatenation, be provided with a d between described capacitor C 2 and the diode D2, be connected with the output of circuit for generating negative voltage 2 by wire L2 after some d and the diode D4 differential concatenation; Be provided with electrochemical capacitor C5, C6, C7, C8, diode D5, resistance R 2 between described wire L1 and the L2, described electrochemical capacitor C5, C6, C7, C8 negative terminal are connected with L1, and anode is connected with wire L2 and ground connection.
The ground floor protective circuit is namely divided pulse control switch 1; the importation is Single Chip Microcomputer (SCM) PWM signal and an I/O signal; the I/O signal is that high level allows the PWM output signal to pass through; the I/O signal is that the low level pwm signal is invalid; the I/O signal plays the function of control PWM break-make; only when PWM had pulse signal and I/O signal to be high level, outlet side just had pwm pulse output to this part, and this switch mainly prevents in the output of program operation process PWM pin mistake.
Second layer protective circuit is negative voltage generation circuit, and diode utilizes the charge-discharge characteristic of electric capacity to make output voltage maintain negative 1.6V by selectively by the high-low signal of PWM.By mating different resistance capacitance values; make the pwm pulse that only has particular duty cycle can export our needed negative 1.6V voltage; by such design guarantee single-chip microcomputer power on and the power down process in, in the larger situation of on-the-spot interference ratio; the requirement that has the I/O of high level signal to also have simultaneously the pwm signal of particular duty cycle be can't reach, microcomputer protective relay device and the not malfunction of synthesis observe and control device exit relay guaranteed like this.
The three-layer protection circuit is photoelectricity isolation control circuit 3; the optocoupler positive ending grounding; negative terminal connects the negative voltage by circuit for generating negative voltage 2 outputs; optocoupler conducting, microcomputer protective relay device and the action of synthesis observe and control device exit relay when only having the negative voltage that generates when negative voltage generation circuit less than negative 1.2V.Because single-chip microcomputer powers on, in the power down process, in the larger situation of on-the-spot interference ratio, can't apply negative signal to the optocoupler control end, thereby guarantee microcomputer protective relay device and the not malfunction of synthesis observe and control device exit relay.
The present invention produces the negative pressure circuit with the PWM that passive component makes up, and solves the process middle outlet relay misoperation of power down on microcomputer protective relay device and synthesis observe and control device; In the very large situation of on-the-spot interference, the exit relay malfunction.
Claims (4)
1. the control circuit of a microcomputer protective relay device and synthesis observe and control device repeat circuit, it is characterized in that: comprise pulse control switch, circuit for generating negative voltage, photoelectricity isolation control circuit, described pulse control switch comprises two input pins, one output pin, wherein an input pin is connected with the pwm signal generator, and another input pin is connected with the I/O signal generator; Described pulse control switch output pin is connected with described circuit for generating negative voltage input, and described circuit for generating negative voltage output is connected with described photoelectricity isolation control circuit input, and described photoelectricity isolation control circuit output is connected with relay coil; By the input of pulse control switch control pwm signal, this circuit is as the ground floor protective circuit; After the pwm signal input that particular duty cycle is arranged, circuit for generating negative voltage is just exported the negative voltage that needs, and this circuit is as second layer protective circuit; After the input of photoelectricity isolation control circuit has the specific voltage input, optocoupler conducting, and then control relay action, this circuit is as the three-layer protection circuit.
2. the control circuit of a kind of microcomputer protective relay device according to claim 1 and synthesis observe and control device repeat circuit, it is characterized in that: in the described circuit for generating negative voltage, capacitor C 1 is connected rear with in parallel with the circuit of diode D2 differential concatenation by capacitor C 2 with diode D1 forward, input a after the parallel connection is connected with the output pin of described pulse control switch, output b after the parallel connection is connected with electrochemical capacitor C3 negative terminal, electrochemical capacitor C4 negative terminal, resistance R 1 respectively, described electrochemical capacitor C3 anode, the positive earth terminal of electrochemical capacitor C4; Be provided with a c between described capacitor C 1 and the diode D1, be connected with the output of circuit for generating negative voltage by wire L1 after some c and the diode D3 differential concatenation, be provided with a d between described capacitor C 2 and the diode D2, be connected with the output of circuit for generating negative voltage by wire L2 after some d and the diode D4 differential concatenation; Be provided with electrochemical capacitor C5, C6, C7, C8, diode D5, resistance R 2 between described wire L1 and the L2, described electrochemical capacitor C5, C6, C7, C8 negative terminal are connected with L1, and anode is connected with wire L2 and ground connection.
3. the control circuit of a kind of microcomputer protective relay device according to claim 1 and synthesis observe and control device repeat circuit, it is characterized in that: described pwm signal generator is single-chip microcomputer, described I/O signal generator is pulse signal generator.
4. the control circuit of a kind of microcomputer protective relay device according to claim 1 and synthesis observe and control device repeat circuit; it is characterized in that: the input of described photoelectricity isolation control circuit comprises positive and negative end; described positive ending grounding, negative terminal is connected with the circuit for generating negative voltage output.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010273640 CN101980349B (en) | 2010-09-03 | 2010-09-03 | Control circuit of relay of microcomputer relay protection device and comprehensive measurement and control device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201010273640 CN101980349B (en) | 2010-09-03 | 2010-09-03 | Control circuit of relay of microcomputer relay protection device and comprehensive measurement and control device |
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| CN101980349A CN101980349A (en) | 2011-02-23 |
| CN101980349B true CN101980349B (en) | 2013-03-20 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103560050B (en) * | 2013-10-30 | 2015-12-02 | 武汉烽火富华电气有限责任公司 | A kind of relaying protection output switch parameter loop start circuit and method |
| CN106160729A (en) * | 2015-03-31 | 2016-11-23 | 展讯通信（上海）有限公司 | A kind of novel negative voltage generator |
| CN111142435B (en) * | 2019-12-25 | 2021-06-08 | 北京四方继保自动化股份有限公司 | Output control method based on relay protection output circuit |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2682570Y (en) * | 2004-03-22 | 2005-03-02 | 北京市科通电子继电器总厂 | Impulse gating control module of solid relay |
| CN101013638A (en) * | 2006-12-18 | 2007-08-08 | 杭州电子科技大学 | Voltage adaptive DC low-voltage tripping controller and control method |
| CN201084651Y (en) * | 2007-08-21 | 2008-07-09 | 钦丽英 | A small-size high-voltage electronic relay |
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- 2010-09-03 CN CN 201010273640 patent/CN101980349B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2682570Y (en) * | 2004-03-22 | 2005-03-02 | 北京市科通电子继电器总厂 | Impulse gating control module of solid relay |
| CN101013638A (en) * | 2006-12-18 | 2007-08-08 | 杭州电子科技大学 | Voltage adaptive DC low-voltage tripping controller and control method |
| CN201084651Y (en) * | 2007-08-21 | 2008-07-09 | 钦丽英 | A small-size high-voltage electronic relay |
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