Risk assessment method for relay protection equipment in intelligent substation

Abstract

Provided is a risk assessment method for relay protection equipment in an intelligent substation. The risk assessment method comprises the following steps: 1) obtaining status information of the relay protection equipment through conventional technological means of operation patrol, regular service-stop maintenance or live detection and on-line monitoring and the like, evaluating the operation performance of the equipment, and obtaining quantized states of the relevant equipment in the corresponding assessment time sections through state scores; 2) according to equipment historical fault cases, assessing the re-occurrence possibility of the relevant faults under the existing equipment state, and relevant loss degree after the fault occurs; 3) judging the equipment asset condition and status importance degree thereof according to relevant equipment information comprising equipment account, grid structure, power supply user information and importance degree; and 4) based on the information of the relay protection equipment above, carrying out integration on the state quantity of the equipment and then, carrying out risk assessment, and making a condition-based maintenance decision for relay protection according to the risk degree of the equipment.

Description

technical field [0001] The invention belongs to the field of state evaluation of relay protection equipment in intelligent substations, relates to risk value evaluation of relay protection equipment in intelligent substations, and can effectively provide a basis for state maintenance decision-making. Background technique [0002] With the development of science and technology, the equipment of the power system is constantly being updated, and most substations have completely entered the mode of automatic control. Relay protection equipment, as the patron saint of power grid equipment, has also fully entered the era of microcomputerization. [0003] In such a big environment, if we continue to use the traditional maintenance mode, in the current situation where the number of substations is increasing by leaps and bounds and there are so many equipments in the substations, inappropriate maintenance planning will lead to a serious shortage of maintenance personnel, and the work...

AI Technical Summary

Problems solved by technology

[0005] Although the traditional evaluation method of condition-based maintenance of relay protection has taken a big step forward from a fixed regular maintenance method to a condition-based maintenance based on the state of the equipment itself, it still has certain deficiencies, and each item is independent. Separate evaluation, to a certain extent, splits the internal connection between some state quantities, and only estimates the situation of each module separately according to several modules

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