CN103391094A - Two-out-of-three logic export optimization method for direct current protection system - Google Patents
Two-out-of-three logic export optimization method for direct current protection system Download PDFInfo
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- CN103391094A CN103391094A CN2013102542838A CN201310254283A CN103391094A CN 103391094 A CN103391094 A CN 103391094A CN 2013102542838 A CN2013102542838 A CN 2013102542838A CN 201310254283 A CN201310254283 A CN 201310254283A CN 103391094 A CN103391094 A CN 103391094A
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Abstract
The invention relates to a two-out-of-three logic export optimization method for a direct current protection system and belongs to the technical field of high voltage direct current transmission control and protection. According to the two-out-of-three logic export optimization method for the direct current protection system, measurement fault signals in OK signals of a high voltage direct current transmission protection system are individually separated to enable measurement fault signals of every protection function to be utilized as an independent two-out-of-three logic judgment condition, protection signals which are related to the measurement fault signals are switched to a one-out-of-two logic, and other protection signals are still in the state of a two-out-of-three logic, so that the mal-operation or miss-operation risk due to the fact that any measurement fault can cause exiting of the complete set of direct current protection functions can be effectively avoided and the reliability of the two-out-of-three logic and the direct current protection system is improved.
Description
Technical field
The present invention relates to a kind of DC protection system three and get two logic outlet optimization methods, belong to high-voltage dc transmission electric control resist technology field.
Background technology
Require DC protection system to have the measure of the tripping of preventing and malfunction from configuration and function in HVDC (High Voltage Direct Current) transmission system, the fault of any single element can not cause the mistake action and rejecting action of protection.
In order to meet above requirement, in Practical Project, DC protection system generally adopts the protection system of triple modular redundant, and outlet logic adopts three to get two logics.the three OK signals of getting two logical foundation protection systems carry out the logic switching, three cover protection systems are all three to get two logics during OK, when wherein one the cover protection system the OK blackout time, three get two logics automatically switches to " two get a logic ", when wherein two the cover protection systems the OK blackout time, automatically switch to " one gets a logic ", when " two get a logic " or " one gets a logic ", the probability of protection system faulty action preventing and tripping reduces greatly, therefore getting to existing three the function that two logic realization imagine originally, the OK signal of protection system has key effect.
Comprised the measurement fault in the DC protection system OK signal that the existing three two logic realization methods of getting adopt; while being arbitrary analog quantity generation measurement fault; the OK blackout of this cover DC protection system; three get two logics switches to " two get a logic "; even other defencive function outlet logic irrelevant with this measurement fault also switch to " two get a logic "; increased protection malfunction may, reduced by three reliabilities of getting two logics and whole system.
Summary of the invention
The purpose of this invention is to provide a kind of DC protection system three and get two logic outlet optimization methods; to solve present DC protection system owing to including the measurement fault-signal in its OK signal; when the OK blackout; three get two logics switches to " two get a logic ";, even other defencive function outlet logic irrelevant with this measurement fault also switch to " two get a logic ", cause the malfunction of protecting to have increased.
The present invention provides a kind of DC protection system three to get two logics outlets optimization methods for solving the problems of the technologies described above, the comprising the following steps of this optimization method:
1) the measurement fault-signal in high-voltage dc transmission electric protection system OK signal is separated separately the hardware and software failure of a reservation protection system itself;
2) make the measurement fault-signal of each defencive function as independently three getting two logic Rule of judgment;
3) guard signal that will be relevant to measuring fault-signal is switched to " two get a logic ", and other guard signals still are " three get two logics ".
In described step 2) measure fault-signal as independently three to get two logic Rule of judgment be to carry out inverse by the measurement fault-signal that will separate, then with protection system OK signal and actuating signal with after together with realize as three input signals of getting two logics.
Guard signal that will be relevant to measuring fault-signal in described step 3) be switched to " two get a logic " be by with high-voltage dc transmission electric protection system OK signal by NOR gate after with by or the measurement fault-signal of door carry out exclusive disjunction, then the result of exclusive disjunction and three input signals of getting two logics of process or a computing are carried out phase and computing.
the invention has the beneficial effects as follows: the present invention separates separately by the measurement fault-signal with in high-voltage dc transmission electric protection system OK signal, make the measurement fault-signal of each defencive function as independently three getting two logic Rule of judgment, the guard signal relevant to measuring fault-signal is switched to " two get a logic ", other guard signals still are " three get two " logic, therefore the present invention can effectively avoid arbitrary measurement fault to cause that a whole set of direct current protecting function withdraws from the risk that causes malfunction or tripping, three reliabilities of getting two logics and DC protection system have been improved.
Description of drawings
Fig. 1 is the computing block diagram that DC protection system three of the present invention is got two logic outlet optimization methods;
Fig. 2 three gets the connection diagram between two devices and direct current protecting and utmost point control.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is further described
The present invention is directed to present DC protection system three gets two logics will withdraw from the shortcoming of a whole set of DC protection system when arbitrary measurement fault; propose a kind of DC protection system three and got two logic outlet optimization methods; this method has realized only the protection relevant to the measurement fault-signal being switched to " two get a logic "; and other protections still keep " three get two logics "; kept to greatest extent three to get two logics; improved three reliabilities of getting two logics and direct current protecting, the method comprises the following steps:
1. at first DC protection system three is got in the protection system OK signal that two logics receive and cancelled and measure fault-signal, the measurement fault-signal that is about to comprise in protection system OK signal is separated, the soft and hardware fault of a reservation protection system itself.
2. the measurement fault-signal of all defencive functions of making a difference independently is sent to three and gets two logics; the measurement fault-signal that is about to separate carries out inverse, then with protection system OK signal and actuating signal with after together with get the input signal of two logics as three.
3. three get two logical foundations measurement fault-signal difference classification; switch to two and get a logic measuring therewith the relevant defencive function of fault; other defencive function keeps three to get two logics; be about to high-voltage dc transmission electric protection system OK signal by NOR gate after with by or the measurement fault-signal of door carry out exclusive disjunction, then with the result of exclusive disjunction with through or three input signals of getting two logics of a computing carry out phase and computing.
Two logical operation block diagrams are got in three of the present embodiment employing, as shown in Figure 1.Wherein: " DCPA_OK ", " DCPB_OK ", " DCPC_OK " be the OK signal of triple modular redundant DC protection system respectively; the measurement fault-signal of certain defencive function in " DCPA_Me_Fa ", " DCPB_Me_Fa ", " DCPC_Me_Fa " difference triple modular redundant DC protection system; DCPA_Act ", " DCPB_Act ", " DCPC_Act " certain defencive function signal of triple modular redundant DC protection system output respectively, OUT_Act three gets two logic output protection actuating signals.At first three get two logics identifies measuring fault-signal; if this measures fault and defencive function is irrelevant; according to left half partial logic of Fig. 1, carry out computing; can find out by this partial logic block diagram; the defencive function irrelevant with measuring fault still kept " three get two logics ", can really export the OUT_Act signal after the protection action more than two covers reach.If it is relevant with defencive function to measure fault-signal, the right half part logic that can be switched in Fig. 1 is carried out computing, and three get two logics automatically switches to " two get a logic ", if the OUT_Act signal will be finally exported in the arbitrary protection action in other two covers protections.
Three get the connection diagram between two logics, direct current protecting and utmost point control, as shown in Figure 2.Three get protection system OK signal, the defencive function signal that two logics receive the output of triple modular redundant DC protection systems and measure fault-signal, and three get two logical foundation input signals carries out after logical operation the output protection actuating signal to control system A, the B of redundancy.
Claims (3)
1. a DC protection system three is got two logics outlet optimization methods, it is characterized in that the comprising the following steps of this optimization method:
1) the measurement fault-signal in high-voltage dc transmission electric protection system OK signal is separated separately the hardware and software failure of a reservation protection system itself;
2) make the measurement fault-signal of each defencive function as independently three getting two logic Rule of judgment;
3) guard signal that will be relevant to measuring fault-signal is switched to " two get a logic ", and other guard signals still are " three get two logics ".
2. DC protection system three according to claim 1 is got two logic outlet optimization methods; it is characterized in that; in described step 2) measure fault-signal as independently three to get two logic Rule of judgment be to carry out inverse by the measurement fault-signal that will separate, then with protection system OK signal and actuating signal with after together with realize as three input signals of getting two logics.
3. DC protection system three according to claim 1 and 2 is got two logic outlet optimization methods; it is characterized in that; guard signal that will be relevant to measuring fault-signal in described step 3) be switched to " two get a logic " be by with high-voltage dc transmission electric protection system OK signal by NOR gate after with by or the measurement fault-signal of door carry out exclusive disjunction, then the result of exclusive disjunction and three input signals of getting two logics of process or a computing are carried out phase and computing.
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| CN201310254283.8A CN103391094B (en) | 2013-06-24 | 2013-06-24 | A kind of DC protection system three gets two logic export optimization method |
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| CN201310254283.8A CN103391094B (en) | 2013-06-24 | 2013-06-24 | A kind of DC protection system three gets two logic export optimization method |
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| CN103391094B CN103391094B (en) | 2016-04-13 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106169739A (en) * | 2016-07-22 | 2016-11-30 | 许继集团有限公司 | A kind of flexible direct current power network line relaying configuration method and device |
| CN106374441A (en) * | 2016-09-20 | 2017-02-01 | 南京南瑞继保电气有限公司 | Rapid protection system |
| CN110148921A (en) * | 2019-05-09 | 2019-08-20 | 许继电气股份有限公司 | A kind of relay protection and control method, system and M take N tripgear |
| CN110471467A (en) * | 2019-08-08 | 2019-11-19 | 浙江浙能嘉华发电有限公司 | Intelligent temperature protecting method and its system |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106169739A (en) * | 2016-07-22 | 2016-11-30 | 许继集团有限公司 | A kind of flexible direct current power network line relaying configuration method and device |
| CN106169739B (en) * | 2016-07-22 | 2019-01-29 | 许继集团有限公司 | A kind of flexible direct current power network line relaying configuration method and device |
| CN106374441A (en) * | 2016-09-20 | 2017-02-01 | 南京南瑞继保电气有限公司 | Rapid protection system |
| CN106374441B (en) * | 2016-09-20 | 2019-05-21 | 南京南瑞继保电气有限公司 | A kind of rapid protection system |
| CN110148921A (en) * | 2019-05-09 | 2019-08-20 | 许继电气股份有限公司 | A kind of relay protection and control method, system and M take N tripgear |
| CN110471467A (en) * | 2019-08-08 | 2019-11-19 | 浙江浙能嘉华发电有限公司 | Intelligent temperature protecting method and its system |
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| CN103391094B (en) | 2016-04-13 |
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