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Indicator system for evaluating reliability of microcomputer relay protection device

A microcomputer relay protection and evaluation index system technology, which is applied in electrical digital data processing, instruments, calculations, etc., can solve the problems that reliability cannot be ignored, the relay protection cannot be comprehensively and accurately evaluated, and the reliability evaluation is single.

Active Publication Date: 2014-11-26
STATE GRID CORP OF CHINA +1
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Problems solved by technology

As the first line of defense of the power system, the reliability of relay protection devices cannot be ignored. However, in previous academic research, the reliability evaluation of relay protection devices mostly used a single index, which has been unable to comprehensively and accurately evaluate relay protection. , therefore, it is necessary to propose an evaluation index system that can comprehensively evaluate the reliability of microcomputer relay protection devices

Method used

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  • Indicator system for evaluating reliability of microcomputer relay protection device
  • Indicator system for evaluating reliability of microcomputer relay protection device
  • Indicator system for evaluating reliability of microcomputer relay protection device

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Experimental program
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Embodiment Construction

[0081] 1) Calculate the reliability index R of the protection device.

[0082] Reliability index R is a general term for the reliability and selectivity of relay protection devices: reliability means that the protection device acts when it should act, and does not act when it should not act; selectivity means that the faulty equipment or line itself is protected or disconnected When the protection of the faulty equipment or line itself or the circuit breaker refuses to operate, it is allowed to remove the fault by the protection of adjacent equipment and lines or the failure protection of the circuit breaker. It is characterized by no false action and no refusal to operate. The reliability index R is the average value of 11 types of indexes:

[0083] R = 1 11 Σ i = 1 11 R i - ...

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Abstract

The invention relates to an indicator system for evaluating the reliability of a microcomputer relay protection device. The indicator system involves the following steps of firstly, calculating a reliability indicator R of the protection device; secondly, calculating a power swing indicator S of the protection device; thirdly, calculating the sensitivity indicator L of the protection device; fourthly, calculating a durability indicator N of the protection device; fifthly, calculating a maintenance indicator W of the protection device; sixthly, calculating an economy indicator J of the protection device; seventhly, converting the obtained reverse evaluation indicators into forward indicators by calculating the indicators R, S, L, N, W and J so that all the indicators can have the same directivity, converting all the forward indicators into relative value indicators, and finally comprehensively and uniformly evaluating the reliability of the relay protection device according to the relative value indicators, wherein the larger the calculation values of the relative value indicators are, the more perfect all the aspects of the protection device are, and the higher the reliability is. The indicator system can comprehensively evaluate the reliability of the relay protection device and is widely applied to relay protection device maintenance management personnel and relay protection device manufacturers.

Description

technical field [0001] The invention relates to a reliability evaluation index system of a power system, in particular to a reliability evaluation index system of a microcomputer relay protection device. Background technique [0002] Relay protection is the first line of defense for power system security. Whether the relay protection can work correctly and reliably has a significant impact on the operation of the power system. In large-scale interconnected power grids, local accidents may cause large-scale blackouts of the entire system, and the probability of accidents will increase as the scale of the power system expands. On August 14, 2003, the power outage in the United States and Canada was rare in the world, causing economic losses of more than 30 billion U.S. dollars, and the production and life of nearly 50 million people were affected to varying degrees, including aviation, communications, water supply, transportation and even social security. The cause of such a ...

Claims

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Application Information

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IPC IPC(8): G06F19/00
Inventor 宋璇坤刘颖薛安成彭竹弈张祥龙
Owner STATE GRID CORP OF CHINA
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