Auditing processing method for relay protection setting value

Abstract

The invention discloses an auditing processing method for a relay protection setting value. The method comprises the following steps of acquiring the reactance X1, the length and an assistance coefficient Kfz of a current line, and a reliability coefficient Kk, which is input by a user, of the current line from an actual model of a power grid; judging whether the assistance coefficient Kfz of the current line is lower than a threshold value or not, and if the assistance coefficient Kfz of the current line is lower than the threshold value, prompting the user that the current line is unmatched with a subordinate line, and finishing the flow, otherwise acquiring a protection sensitivity value of the current line according to the length and the reactance X1 of the current line; determining a protection setting value Actv1 for a first section of a phase spacing of the current line according to the length of the current line; acquiring an action setting value Zp1 of a first section of the subordinate line from the power grid and a matching coefficient Kk1 for a protection setting value of a first section of a phase spacing of the subordinate line from the user; and calculating a protection setting value Actv2=Kk*X1+Kk1*Kfz*Zp1 for a second section of the phase spacing. According to the method, the problems that the conventional auditing processing method is low in calculation efficiency and accuracy and high in labor intensity, and that the protection setting value cannot be timely displayed to workers of the power grid can be solved.

Description

technical field [0001] The invention belongs to the technical field of relay protection of an AC power transmission system, and more specifically relates to an audit processing method of a relay protection fixed value. Background technique [0002] The setting value of relay protection is an important work in the production and operation of power system. The setting calculation uses the data obtained from the power grid to calculate the protection setting, which must meet the requirements of selectivity, quick action, sensitivity and reliability. Once the protection setting is incorrect, it will cause the protection to refuse to operate or malfunction, resulting in Power grid accidents can even cause the entire system to collapse. [0003] With the continuous expansion of the grid scale and the increasingly complex structure of the grid, the workload and complexity of the calculation of the existing power system relay protection settings are increasing, and the following pr...

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Problems solved by technology

[0007] In view of the above defects or improvement needs of the prior art, the present invention provides an audit processing method of relay protection fixed value, the purpose of which is to solve the problems of low calculation efficiency, high work intensity and low accuracy in the existing audit processing method 1. The problem that the protection setting value cannot be displayed to the power grid staff in time, avoiding the situation that the basic setting principle is violated due to misoperation and other factors in the process of manual adjustment of the setting value, and overcomes the calculation error or operation error of the protection setting value , the staff of the power grid need to repeatedly check the technical problems that are time-consuming and labor-intensive

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