CN101435347A - Full fault automatic stop relay protection circuit of steam turbine digital electrohydraulic control system master control modular unit - Google Patents
Full fault automatic stop relay protection circuit of steam turbine digital electrohydraulic control system master control modular unit Download PDFInfo
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- CN101435347A CN101435347A CNA2008101478551A CN200810147855A CN101435347A CN 101435347 A CN101435347 A CN 101435347A CN A2008101478551 A CNA2008101478551 A CN A2008101478551A CN 200810147855 A CN200810147855 A CN 200810147855A CN 101435347 A CN101435347 A CN 101435347A
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Abstract
The invention relates to a total failure autostop relay protection circuit for a master control module of a digital electro-hydraulic control system of a steam turbine. The circuit has an autostop relay controlled by soft logic. The autostop relay protection circuit which adopts hardware electric elements is formed by a time relay and the prior relay which are connected according to the 'AND' logic. A wire pad of the time relay is connected with an output module of a master control member; and a normally-open contact of the prior relay is connected in parallel with a normally-open contact of the autostop relay controlled by the soft logic. The total failure autostop relay protection circuit has the advantages that under the condition that a soft logic control system of the steam turbine has failure, the steam turbine is automatically stopped through hard wiring relay logic, thereby ensuring the safety of the steam turbine.
Description
Technical field
The present invention relates to digital electro-hydraulic control system, relate in particular to the main control module total failure automatic stop relay protection circuit of this system.
Background technique
Conventional steam turbine digital electricity liquid (MEH) control system autostop relay logic as shown in Figure 1; because relay R 3 is controlled by soft logic; when MEH control system main control module total failure (as the equal fault of two DPU); relay R 3 can not moved; control system can't be exported MEH autostop signal, thereby make the steam turbine of high speed rotating be in dangerous runaway condition.This moment the MEH control system all leave state before signal condition will keep main control module fault, the relay that the control high pressure interdicts solenoid valve can not move, steam turbine can't autostop under this danger situation, has only by stop botton and shuts down manually.But when the stop botton blackout, high pressure blocking solenoid valve may cause the improper lock of hanging again of steam turbine from horizontal reset again, and this situation very likely causes security incident.
Summary of the invention
Purpose of the present invention, provide a kind of when MEH control system main control module total failure, digital electro-hydraulic control system main control module total failure automatic stop relay protection circuit that also can autostop.
Technical solution of the present invention is:
A kind of digital electro-hydraulic control system main control module total failure automatic stop relay protection circuit; this circuit has the auto shutdoown relay by soft logic control; it is characterized in that this automatic stop relay protection circuit adopts the hardware electric elements; by the time relay and conventional relay by " with " logic connects and composes; the line bag of the described time relay connects the module of leaving of main control module, and the normal opened contact of conventional relay is in parallel with the normal opened contact of the auto shutdoown relay of being controlled by soft logic.
Described automatic stop relay protection circuit by a time relay and a conventional relay by " with " logic is connected.Or
Described automatic stop relay protection circuit by two time relays by " or " logic connects, again with a conventional relay by " with " logic is connected.Or
Described automatic stop relay protection circuit by two time relays by " with " logic is connected, press with a conventional relay again " with " logic is connected.Or
Described automatic stop relay protection circuit have two by " or " branch road that connects of logic, each bar prop up time relay of route and a conventional relay by " with " logic is connected; The normal opened contact of two conventional relays by " with " logic is connected.
Useful technique effect of the present invention:
Under steam turbine soft logic control system failure condition, the present invention has guaranteed the Security of steam turbine by hardwire relay logic realization steam turbine autostop.
Description of drawings
Fig. 1 is steam turbine digital electricity liquid (MEH) control system autostop relay logic diagram
Fig. 2 is the circuit diagram of the embodiment of the invention one
Fig. 3 is the circuit diagram of the embodiment of the invention two
Fig. 4 is the circuit diagram of the embodiment of the invention three
Fig. 5 is the circuit diagram of the embodiment of the invention four
Fig. 6 is the wiring diagram of the time relay
Embodiment
Embodiment one
Referring to Fig. 2, Fig. 6: this MEH control system main control module total failure automatic stop relay protection circuit by a time relay SR and a conventional relay R by " with " logic is connected.
Its working principle is: send out two pulse signals by engineer station's configuration logic of MEH control system, leave a road of module by two respectively and leave passage output (dry contact output), this two pulse signals is connected to the actuating signal input end of time relay SR again respectively.When MEH control system main control module (DPU) proper functioning, pulse signal also will continue to send.At this moment, the line bag of time relay SR is often charged, its break contact SR
1Be in off state, then conventional relay R is failure to actuate.If MEH control system main control module total failure, pulse signal also disappear immediately.At this moment, time relay SR detects actuating signal and disappears and to pick up counting, and when the timing time that overtime relay SR is provided with, time relay line bag is dead electricity, its break contact SR
1Also recover closed state by off state, so conventional relay R will be moved, its normal opened contact R
1With closure.The normal opened contact R of this routine relay R
1Insert in the autostop relay loop of Fig. 1 the automatic shutdown function when promptly beating the hard loop of lock relay (being equivalent to the R3 among Fig. 1) and can realize MEH control system main control module total failure.
Embodiment two
Referring to Fig. 3, Fig. 6: this MEH control system main control module total failure automatic stop relay protection circuit by two time relay 1SR, 2 SR by " or " logic connects, again with a conventional relay R by " with " logic is connected.
Its working principle is: send out two pulse signals by engineer station's configuration logic of MEH control system, leave a road of module by two respectively and leave passage output (dry contact output), this two pulse signals is connected to the actuating signal input end of time relay 1SR, 2 SR again respectively.When MEH control system main control module (DPU) proper functioning, pulse signal also will continue to send.At this moment, the line bag of time relay 1SR, 2 SR is often charged, its break contact 1SR
1, 2 SR
1Be in off state, then conventional relay R is failure to actuate.If MEH control system main control module total failure, pulse signal also disappear immediately.At this moment, time relay 1SR, 2 SR detect actuating signal and disappear and to pick up counting, and when the timing time that overtime relay 1SR, 2 SR are provided with, time relay line bag is dead electricity, its break contact 1SR
1, 2 SR
1Also recover closed state by off state, so conventional relay R will be moved, its normal opened contact R
1With closure.The normal opened contact R of this routine relay R
1Insert in the autostop relay loop of Fig. 1 the automatic shutdown function when promptly beating the hard loop of lock relay (being equivalent to the R3 among Fig. 1) and can realize MEH control system main control module total failure.
Embodiment three
Referring to Fig. 4, Fig. 6: this MEH control system main control module total failure automatic stop relay protection circuit by two time relay 1SR, 2 SR by " with " logic is connected, press with a conventional relay R again " with " logic is connected.
Its working principle is: send out two pulse signals by engineer station's configuration logic of MEH control system, leave a road of module by two respectively and leave passage output (dry contact output), this two pulse signals is connected to the actuating signal input end of time relay 1SR, 2 SR again respectively.When MEH control system main control module (DPU) proper functioning, pulse signal also will continue to send.At this moment, the line bag of time relay 1SR, 2 SR is often charged, its break contact 1SR
1, 2 SR
1Be in off state, then conventional relay R is failure to actuate.If MEH control system main control module total failure, pulse signal also disappear immediately.At this moment, time relay 1SR, 2 SR detect actuating signal and disappear and to pick up counting, and when the timing time that overtime relay 1SR, 2 SR are provided with, time relay line bag is dead electricity, its break contact 1SR
1, 2SR
1Also recover closed state by off state, so conventional relay R will be moved, its normal opened contact R
1With closure.The normal opened contact R of this routine relay R
1Insert in the autostop relay loop of Fig. 1 the automatic shutdown function when promptly beating the hard loop of lock relay (being equivalent to the R3 among Fig. 1) and can realize MEH control system main control module total failure.
Embodiment four
Referring to Fig. 5, Fig. 6: this MEH control system main control module total failure automatic stop relay protection circuit is made of two time relay 1SR, 2SR and two conventional relay 1R, 2R; time relay 1SR and conventional relay 1R by " with " logic is connected; time relay 2SR and conventional relay 2R also by " with " logic is connected; constitute two by " or " branch road that connects of logic, the normal opened contact 1R of conventional relay 1R, 2R
1, 2R
1By " with " logic is connected.
Its working principle is: send out two pulse signals by engineer station's configuration logic of MEH control system, leave a road of module by two respectively and leave passage output (dry contact output), this two pulse signals is connected to the actuating signal input end of time relay 1SR, 2 SR again respectively.When MEH control system main control module (DPU) proper functioning, pulse signal also will continue to send.At this moment, the line bag of time relay 1SR, 2SR is often charged, its break contact 1SR
1, 2SR
1Be in off state, then conventional relay 1R, 2R are failure to actuate.If MEH control system main control module total failure, pulse signal also disappear immediately.At this moment, time relay 1SR, 2 SR detect actuating signal and disappear and to pick up counting, and when the timing time that overtime relay 1SR, 2 SR are provided with, time relay line bag is dead electricity, its break contact 1SR
1, 2 SR
1Also recover closed state by off state, so conventional relay 1R, 2R will move, its normal opened contact 1R
1, 2R
1With closure.The normal opened contact 1R of this routine relay 1R, 2R
1, 2R
1Insert in the autostop relay loop of Fig. 1 the automatic shutdown function when promptly beating the hard loop of lock relay (being equivalent to the R3 among Fig. 1) and can realize MEH control system main control module total failure.
The foregoing description two, three, four is taked the control mode of redundant configuration, and the reliability height should preferentially adopt.
This MEH control system main control module total failure automatic stop relay protection circuit had both embodied abundant security doctrine, had realized optimum configuration again, steam turbine automatic shutdown function in the time of realizing main control module total failure fully.
Claims (5)
1. digital electro-hydraulic control system main control module total failure automatic stop relay protection circuit; this circuit has the auto shutdoown relay by soft logic control; it is characterized in that: this automatic stop relay protection circuit adopts the hardware electric elements; by the time relay and conventional relay by " with " logic connects and composes; the line bag of the described time relay connects the module of leaving of main control module, and the normal opened contact of conventional relay is in parallel with the normal opened contact of the auto shutdoown relay of being controlled by soft logic.
2. digital electro-hydraulic control system main control module total failure automatic stop relay protection circuit according to claim 1 is characterized in that: described automatic stop relay protection circuit by a time relay and a conventional relay by " with " logic is connected.
3. digital electro-hydraulic control system main control module total failure automatic stop relay protection circuit according to claim 1; it is characterized in that: described automatic stop relay protection circuit by two time relays by " or " logic connects, again with a conventional relay by " with " logic is connected.
4. digital electro-hydraulic control system main control module total failure automatic stop relay protection circuit according to claim 1; it is characterized in that: described automatic stop relay protection circuit by two time relays by " with " logic is connected, press with a conventional relay again " with " logic is connected.
5. digital electro-hydraulic control system main control module total failure automatic stop relay protection circuit according to claim 1, it is characterized in that: described automatic stop relay protection circuit have two by " or " branch road that connects of logic, each bar prop up time relay of route and a conventional relay by " with " logic is connected; The normal opened contact of two conventional relays by " with " logic is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101478551A CN101435347B (en) | 2008-12-13 | 2008-12-13 | Full fault automatic stop relay protection circuit of steam turbine digital electrohydraulic control system master control modular unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101478551A CN101435347B (en) | 2008-12-13 | 2008-12-13 | Full fault automatic stop relay protection circuit of steam turbine digital electrohydraulic control system master control modular unit |
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| CN101435347A true CN101435347A (en) | 2009-05-20 |
| CN101435347B CN101435347B (en) | 2010-08-11 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102877896A (en) * | 2012-10-11 | 2013-01-16 | 沈翀 | Trip protection system of steam turbine in emergency situations |
| CN104033192A (en) * | 2014-06-13 | 2014-09-10 | 哈尔滨汽轮机厂有限责任公司 | Second or first rotation speed and jumping protective device for steam turbine |
| CN110231797A (en) * | 2019-04-30 | 2019-09-13 | 华电电力科学研究院有限公司 | A kind of ETS trip(ping) circuit on-line monitoring method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4471446A (en) * | 1982-07-12 | 1984-09-11 | Westinghouse Electric Corp. | Control system and method for a steam turbine having a steam bypass arrangement |
| CN2739361Y (en) * | 2004-07-14 | 2005-11-09 | 东方汽轮机厂 | Steam turbine oil switch dynamic-acting load overspeed safety protecting system |
| CN101307699B (en) * | 2007-05-14 | 2010-05-19 | 上海电气电站设备有限公司 | Digital electrichydraulic control system for generating plant turboset |
-
2008
- 2008-12-13 CN CN2008101478551A patent/CN101435347B/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102877896A (en) * | 2012-10-11 | 2013-01-16 | 沈翀 | Trip protection system of steam turbine in emergency situations |
| CN102877896B (en) * | 2012-10-11 | 2015-08-19 | 沈翀 | Turbine emergency situation trip protection system |
| CN104033192A (en) * | 2014-06-13 | 2014-09-10 | 哈尔滨汽轮机厂有限责任公司 | Second or first rotation speed and jumping protective device for steam turbine |
| CN110231797A (en) * | 2019-04-30 | 2019-09-13 | 华电电力科学研究院有限公司 | A kind of ETS trip(ping) circuit on-line monitoring method |
| CN110231797B (en) * | 2019-04-30 | 2021-05-28 | 华电电力科学研究院有限公司 | Online monitoring method for ETS (extraction-transformation-Loading) trip circuit |
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| Publication number | Publication date |
|---|---|
| CN101435347B (en) | 2010-08-11 |
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Owner name: SICHUAN ORIENT ELECTRIC AUTOMATIC CONTROL ENGINEER Effective date: 20121107 |
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Free format text: CORRECT: ADDRESS; FROM: 618201 DEYANG, SICHUAN PROVINCE TO: 618000 DEYANG, SICHUAN PROVINCE |
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Effective date of registration: 20121107 Address after: 618000 Jiangxi hi tech Industrial Park, Sichuan, Jinsha Road, No. 666, No. Patentee after: Dongfang Turbine Co., Ltd., Dongfang Electric Group Patentee after: Sichuan Orient Electric Automatic Control Engineering Co., Ltd. Address before: 618201 Deyang City, Sichuan Province town of Hanwang Patentee before: Dongfang Turbine Co., Ltd., Dongfang Electric Group |
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Address after: 618000 Jinsha Jiangxi Road, high tech Industrial Park, Deyang, Sichuan, 666 Co-patentee after: Dongfang Electric Automatic Control Engineering Co., Ltd. Patentee after: Dongfang Turbine Co., Ltd., Dongfang Electric Group Address before: 618000 Jinsha Jiangxi Road, high tech Industrial Park, Deyang, Sichuan, 666 Co-patentee before: Sichuan Orient Electric Automatic Control Engineering Co., Ltd. Patentee before: Dongfang Turbine Co., Ltd., Dongfang Electric Group |