Fully-digital relay protection reliability system based on software failure and human failure, and evaluation method of system
A relay protection, all-digital technology, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve problems such as the inability to simulate the operation of the all-digital relay protection system and the failure to consider the protection reliability.
Active Publication Date: 2013-02-27
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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[0010] The present invention aims at the conventional protection as the research object of the reliability evaluation of the existing relay protection, only considers the hardware failure of the protec...
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[0030] The preferred embodiments will be described in detail below in conjunction with the accompanying drawings. It should be emphasized that the following description is only exemplary and not intended to limit the scope of the invention and its application.
[0031] A fully digital relay protection reliability system considering software failure and human failure, the relay protection reliability system includes:
[0032] Full-digital relay protection hardware reliability system, this system is aimed at the failure of full-digital relay protection hardware, and based on the structure of full-digital relay protection hardware, it is a reliability system that reflects the law of hardware failure;
[0033] All-digital relay protection software reliability system, this system is a reliability system established for all-digital relay protection system software failure, combined with software failure mode;
[0034] Fully digital relay protection artificial reliability system, th...
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The invention relates to a fully-digital relay protection reliability system based on software failure and human failure, and an evaluation method of the system, and belongs to the field of relay protection reliability of power systems. The fully-digital relay protection reliability system comprises a hardware reliability system, a software reliability system and a human reliability system, and when a failure occurs in any one of the hardware reliability system, the software reliability system and the human reliability system, the fully-digital relay protection reliability system fails to work. The evaluation method comprises the following steps: establishing the hardware reliability system, the software reliability system and the human reliability system for the fully-digital relay protection reliability system; establishing a Markov state space of the fully-digital relay protection reliability system; and calculating the availability of the fully-digital relay protection reliability system according to a Markov system. The sum of the probabilities of steady state of the fully-digital relay protection reliability system in the normal state is the system availability. By considering the software and human failures which influence the relay protection reliability, the relay protection reliability system capable of effectively simulating the condition of state transition of the fully-digital relay protection system, and the evaluation method are established, and the problem that the conventional system considers the hardware failure in protection only from a perspective of the protective device without considering other factors of protection reliability is solved.
Description
technical field [0001] The present invention relates to a relay protection reliability system and evaluation method, in particular to an all-digital relay protection [0002] The reliability system and evaluation method belong to the field of power system relay protection reliability. Background technique [0003] As the first line of defense of the power system, the relay protection device plays a decisive role in ensuring the safe operation of the power grid. Ensuring the reliability of the relay protection device is one of the important contents to ensure the safe and stable operation of the power grid. With the digital transformation and upgrading of substations, all-digital relay protection is gradually replacing conventional protection and is widely used. [0004] The methods for studying the reliability of relay protection include Monte Carlo simulation method, network method, fault tree method and Markov state space method. Relay protection is a repairable system,...
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Inventor 薛安成王宝罗麟王睿琛毕天姝
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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