CN103560050A - Starting circuit and method for relay protection switching value output circuit - Google Patents
Starting circuit and method for relay protection switching value output circuit Download PDFInfo
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- CN103560050A CN103560050A CN201310525010.2A CN201310525010A CN103560050A CN 103560050 A CN103560050 A CN 103560050A CN 201310525010 A CN201310525010 A CN 201310525010A CN 103560050 A CN103560050 A CN 103560050A
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Abstract
The invention provides a starting circuit for a relay protection switching value output circuit. The starting circuit can reliably protect a relay protection device from sending outlet instructions by mistake. According to the technical scheme of the starting circuit, a GPIO pin of a processor and an IO pin of a programmable device are connected with an input pin of a single stable-state multivibrator, an output pin of the multivibrator controls on-off of an optocoupler, a relay is controlled to start and be locked through on-off of the optocoupler, and the relay starts and is locked to control a power supply of a switching value output relay. On the condition, switching value output instructions are sent out normally only when the processor is completely initialized and complete operation, the programmable device completes configuration completely, a system operates normally, and the power supply of the switching value output circuit is turned on. If processing failures, or operation system abnormality or programmable device failures occur, the power supply of the switching value output circuit is cut off, the protection device can not send out switching value output instructions, so that risks, of sending switching value output instructions by mistake, caused by failures of the relay protection device are reduced.
Description
Technical field
The start-up circuit and the method that the present invention relates to a kind of relaying protection switching value output loop, belong to industrial automation, especially electric relay protection field.
Background technology
In relaying protection field, automation equipment is by the driving of relay being realized to the output of switching value, and with this control controlled system operation.Especially relaying protection enters Microcomputer Protection after the epoch, and the switching value output of relay output is the IO pin by the microprocessor of protective device substantially, by light-coupled isolation rear drive switching value output relay, realizes.Yet the available IO resource of general microprocessor is more limited, in order to realize the more input and output of the switching value of multichannel, control, usual method is (as FPGA with programming device, CPLD etc.) realize the expansion of IO and other interface, programming device is connected by certain bus with microprocessor.The chip such as microprocessor and programming device exists various uncontrollable IO pin states such as power-up initializing and device fault, may cause automation equipment mistake to be sent out and output order, causes controlled plant misoperation.This is unacceptable for safety and reliability requires relatively high power industry.
In order to prevent error action of device work, automation equipment is generally all designed with and starts loop.The IO pin that generally starts back route processors is controlled starting relay after light-coupled isolation, the power supply of starting relay control switch amount output relay.Only have after starting relay starts, switching value output relay just can obtain power supply, just can send and output order.Yet in actual applications, because the microprocessor of automation equipment generally all wants operation system also will process the algorithm of various complexity.If microprocessor is processed bad to above-mentioned time beat and the control of various pin, or the initial stage microprocessor of powering on is in init state, control the pin state of starting relay in nondeterministic statement, probably cause starting relay to start, and then cause automation equipment mistake to output order.Therefore this conventional start-up circuit exists certain risk and drawback.
Summary of the invention
The invention provides a kind of circuit that is applied to switching value output startup with the locking in relaying protection field, the protective relaying device that prevents that can be reliable sends a mouthful order by mistake, has improved the reliability of automation equipment.
For realizing above goal of the invention, the present invention proposes a kind of relaying protection switching value output loop start-up circuit, its difference is: it comprises monostable flipflop, be connected microprocessor and programming device with monostable flipflop level triggers input pin, with gate device, photoelectric isolating device and relay, the pulse-triggered input pin of the IO pin order steady state trigger of the GPIO pin of microprocessor and programming device, monostable flipflop is by realizing with logic and then export the break-make of controlling optocoupler with door, utilize the break-make of optocoupler to control starting relay, starting relay is controlled the power supply of outputing relay.
By above scheme, the pulse duration of described monostable flipflop is adjustable, by the external electric capacity of monostable flipflop and its pulse duration of resistance adjustment t
wand guarantee the pulse duration of output when this pulse duration is greater than the GPIO pin of microprocessor and programmable logic device and normally moves, with this, only guarantee that the output pin of monostable flipflop can be exported lasting high level or low level in the situation that microprocessor and programming device all work.
By above scheme, when exporting lasting height comment or low level, monostable flipflop just can make photoelectrical coupler conducting, by photoelectrical coupler, starting relay is started, and then be communicated with the power supply of pass amount output loop, make normally output switch amount of switching value output loop.
Press above scheme, first adjustment and monostable flipflop R pin and the resistance of C pin, the pulsewidth t that electric capacity makes monostable flipflop
wwhile being greater than microprocessor and programming device normal operation, continue the width of the impulse waveform of output; After microprocessor and programming device all work, the output high level that the lasting pulse of their output can continue the Q pin of corresponding with it monostable flipflop, then makes photoelectrical coupler conducting with door output high level to photoelectrical coupler; Photoelectrical coupler conducting starts the starting relay being attached thereto, and after starting relay starts, 24V power positive end is given 24V power supply on the relay of switching value output loop by the make contact of starting relay.
Contrast prior art, beneficial effect of the present invention is: the pulse-triggered input pin of the IO pin order steady state trigger of the GPIO pin of microprocessor of the present invention and programming device, the output pin of monostable flipflop is controlled the break-make of optocoupler, utilize the break-make of optocoupler to control starting relay, starting relay is controlled the power supply of outputing relay.In this case, only in the complete initialization of processor, complete, and programming device configured completely, the situation lower device of the normal operation of system is just opened the power supply of the amount of opening output loop, device can normally be sent and output order.If there is microprocessor and do not complete break down any one in the situations such as fault, operating system are abnormal, programming device fault of initialization, microprocessor in automation equipment; the power supply of switching value output loop will be turned off; protective device can not send outputs order; thereby greatly reduce the probability of outputing order by mistake being sent by protective relaying device fault, improved the reliability of automation equipment.
Accompanying drawing explanation
Fig. 1 is the theory diagram of the embodiment of the present invention.
Embodiment
As shown in Figure 1; a kind of relaying protection switching value output loop start-up circuit; it comprises monostable flipflop, be connected microprocessor and programming device with monostable flipflop level triggers input pin, with gate device, photoelectric isolating device and relay; the pulse-triggered input pin of the IO pin order steady state trigger of the GPIO pin of microprocessor and programming device; monostable flipflop is by realizing with logic and then export the break-make of controlling optocoupler with door; utilize the break-make of optocoupler to control starting relay, starting relay is controlled the power supply of outputing relay.
The present invention is the circuit that is applied to the switching value in relaying protection field output startup and locking, and the protective relaying device that prevents that can be reliable sends a mouthful order by mistake.The input pin of the IO pin order steady state multivibrator of the GPIO pin of processor and programming device, the output pin of multivibrator is controlled the break-make of optocoupler, utilize the break-make of optocoupler to control startup and blocking relay, startup and blocking relay are controlled the power supply of outputing relay.In this case, only, at the complete initialization complete operation of processor, programming device has configured completely, and the normal operation of system is got up, and device is just outputed the power supply in loop, can normally send and output order; If there is handling failure; any one of the situations such as operating system is abnormal, programming device fault, the power supply of outputing loop will be turned off; protective device can not send outputs order, thereby reduced, sends the risk of outputing order because of protective relaying device fault by mistake.
Concrete, as shown in Figure 1, the pulse-width adjustment resistance and the electric capacity that the present invention includes two monostable flipflop U1 and U2 and be attached thereto, one and gate device U3, a photoelectrical coupler U4, a starting relay QDJ.Two monostable flipflops are in reciprocity position, and the pulse input pin of one of them monostable flipflop connects the GPIO pin of microprocessor, and the pulse input pin of another monostable flipflop connects the IO pin of programming device.The resistance that pulsewidth width adjustment is used and electric capacity are connected on the R and C pin of these two monostable state triggers, are used for adjusting the pulsewidth of corresponding monostable flipflop.Be connected with the input of gate device and the Q pin of two monostable flipflops, output is connected on the anode on the former limit of photoelectrical coupler.The output of the anode AND circuit on the former limit of photoelectrical coupler, the negative terminal on the former limit of photoelectrical coupler is connected with signal ground.The collector electrode of the phototriode of photoelectrical coupler secondary connects 24V power positive end by the coil QDJA of starting relay, and the emitter of the phototriode of photoelectrical coupler secondary connects the negative terminal of 24V power supply.The make contact end DQJB of starting relay is connected with 24V power positive end, the anode of another termination switching value output loop relay power.
The method of work of this circuit is, adjusts and monostable flipflop R pin and the resistance of C pin, the pulsewidth t that electric capacity makes monostable flipflop
wwhile being greater than microprocessor and programming device normal operation, continue the width of the impulse waveform of output.After microprocessor and programming device all work, the output high level that the lasting pulse of their output can continue the Q pin of corresponding with it monostable flipflop, then makes photoelectrical coupler conducting with door output high level to photoelectrical coupler.Photoelectrical coupler conducting starts the starting relay being attached thereto, and after starting relay starts, 24V power positive end is given 24V power supply on the relay of switching value output loop by the make contact of starting relay.After switching value output loop acquisition power supply, could normally send and output order.When any fault appears in microprocessor or programming device, they all can not send lasting pulse, and starting relay can not start like this, and switching value output loop will cannot send and output order owing to losing power supply.
Above-mentioned photoelectrical coupler also can substitute with other isolating device, and above-mentioned relay is also not limited only to electromagnetic type relay, can be that various types of relays are realized.Only otherwise exceed the disclosed method of this patent and thought, this circuit being done to some change at the device of specific implementation and concrete circuit connecting mode should be all the scope of this patent protection.
Claims (4)
1. a relaying protection switching value output loop start-up circuit; it is characterized in that: it comprises monostable flipflop, is connected microprocessor and programming device with monostable flipflop level triggers input pin, with gate device, photoelectric isolating device and relay; the pulse-triggered input pin of the IO pin order steady state trigger of the GPIO pin of microprocessor and programming device; monostable flipflop is by realizing with logic and then export the break-make of controlling optocoupler with door; utilize the break-make of optocoupler to control starting relay, starting relay is controlled the power supply of outputing relay.
2. relaying protection switching value output loop start-up circuit according to claim 1, is characterized in that: the pulse duration of described monostable flipflop is adjustable, by the external electric capacity of monostable flipflop and its pulse duration of resistance adjustment t
wand guarantee the pulse duration of output when this pulse duration is greater than the GPIO pin of microprocessor and programmable logic device and normally moves, with this, only guarantee that the output pin of monostable flipflop can be exported lasting high level or low level in the situation that microprocessor and programming device all work.
3. relaying protection switching value output loop start-up circuit according to claim 1; it is characterized in that: when monostable flipflop is exported lasting height comment or low level, just can make photoelectrical coupler conducting; by photoelectrical coupler, starting relay is started; and then be communicated with the power supply that output loop is measured in pass, make normally output switch amount of switching value output loop.
4. a relaying protection switching value output loop starting method, is characterized in that: first adjust and monostable flipflop R pin and the resistance of C pin, the pulsewidth t that electric capacity makes monostable flipflop
wwhile being greater than microprocessor and programming device normal operation, continue the width of the impulse waveform of output; After microprocessor and programming device all work, the output high level that the lasting pulse of their output can continue the Q pin of corresponding with it monostable flipflop, then makes photoelectrical coupler conducting with door output high level to photoelectrical coupler; Photoelectrical coupler conducting starts the starting relay being attached thereto, and after starting relay starts, 24V power positive end is given 24V power supply on the relay of switching value output loop by the make contact of starting relay.
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| CN201310525010.2A CN103560050B (en) | 2013-10-30 | 2013-10-30 | A kind of relaying protection output switch parameter loop start circuit and method |
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| CN201310525010.2A CN103560050B (en) | 2013-10-30 | 2013-10-30 | A kind of relaying protection output switch parameter loop start circuit and method |
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| CN103560050B CN103560050B (en) | 2015-12-02 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104331005A (en) * | 2014-10-13 | 2015-02-04 | 山西省交通科学研究院 | Dormancy and wake-up control system and dormancy and wake-up control method for wireless strain acquisition instrument |
| CN104459565A (en) * | 2014-12-02 | 2015-03-25 | 广东威创视讯科技股份有限公司 | Power source reliability testing equipment |
| CN104749657A (en) * | 2015-03-06 | 2015-07-01 | 苏州市职业大学 | Environment monitor for solar power station |
| WO2017173998A1 (en) * | 2016-04-06 | 2017-10-12 | Tian Jianlong | Dynamic system resonant frequency detection and compensation methods for wpt and relevant technologies |
| CN109742868A (en) * | 2019-03-04 | 2019-05-10 | 海能赫兹(青岛)技术有限公司 | A kind of one-to-many wireless charging emitter and wireless charging method of supplying power to |
| CN110086155A (en) * | 2019-06-11 | 2019-08-02 | 云南电网有限责任公司电力科学研究院 | A kind of triggering quick harmonic elimination apparatus of three-phase certainly |
| CN111142435A (en) * | 2019-12-25 | 2020-05-12 | 北京四方继保自动化股份有限公司 | Relay protection open circuit and open control method thereof |
| CN112863939A (en) * | 2021-01-06 | 2021-05-28 | 许继集团有限公司 | Start relay opening control method and device |
| CN113742124A (en) * | 2021-08-25 | 2021-12-03 | 许继集团有限公司 | Intelligent IO (input/output) outlet self-checking method and system based on CAN (controller area network) bus |
| CN114217544A (en) * | 2021-11-02 | 2022-03-22 | 云南电网有限责任公司昆明供电局 | Relay protection outlet logic self-checking system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104331005A (en) * | 2014-10-13 | 2015-02-04 | 山西省交通科学研究院 | Dormancy and wake-up control system and dormancy and wake-up control method for wireless strain acquisition instrument |
| CN104459565A (en) * | 2014-12-02 | 2015-03-25 | 广东威创视讯科技股份有限公司 | Power source reliability testing equipment |
| CN104749657A (en) * | 2015-03-06 | 2015-07-01 | 苏州市职业大学 | Environment monitor for solar power station |
| WO2017173998A1 (en) * | 2016-04-06 | 2017-10-12 | Tian Jianlong | Dynamic system resonant frequency detection and compensation methods for wpt and relevant technologies |
| CN109742868A (en) * | 2019-03-04 | 2019-05-10 | 海能赫兹(青岛)技术有限公司 | A kind of one-to-many wireless charging emitter and wireless charging method of supplying power to |
| CN110086155B (en) * | 2019-06-11 | 2021-09-24 | 云南电网有限责任公司电力科学研究院 | Self-triggering three-phase quick harmonic elimination device |
| CN110086155A (en) * | 2019-06-11 | 2019-08-02 | 云南电网有限责任公司电力科学研究院 | A kind of triggering quick harmonic elimination apparatus of three-phase certainly |
| CN111142435A (en) * | 2019-12-25 | 2020-05-12 | 北京四方继保自动化股份有限公司 | Relay protection open circuit and open control method thereof |
| CN112863939A (en) * | 2021-01-06 | 2021-05-28 | 许继集团有限公司 | Start relay opening control method and device |
| CN112863939B (en) * | 2021-01-06 | 2024-05-14 | 许继集团有限公司 | Start relay opening control method and device |
| CN113742124A (en) * | 2021-08-25 | 2021-12-03 | 许继集团有限公司 | Intelligent IO (input/output) outlet self-checking method and system based on CAN (controller area network) bus |
| CN113742124B (en) * | 2021-08-25 | 2024-02-13 | 河南源网荷储电气研究院有限公司 | Intelligent IO (input/output) self-checking method and system based on CAN (controller area network) bus |
| CN114217544A (en) * | 2021-11-02 | 2022-03-22 | 云南电网有限责任公司昆明供电局 | Relay protection outlet logic self-checking system and method |
| CN114217544B (en) * | 2021-11-02 | 2024-02-27 | 云南电网有限责任公司昆明供电局 | Relay protection export logic self-checking system and method |
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| CN103560050B (en) | 2015-12-02 |
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