Motion simulation method of protection constant value

Abstract

The invention discloses a motion simulation method of a protection constant value. The motion simulation method can simulate switch motion full processes of distance protection, current voltage protection, zero sequence current protection and transformer reserve protection, checks accuracy of the protection constant value, improves motion stimulation calculating speed of the protection constant value and provides guarantee for safe stable operation of a power grid. The motion simulation method comprises the steps of (1) initialing data including failure calculating for the first time; (2) reading a switch in the protective research range; (3) judging whether the switch meets an end condition or not, jumping to a step (8) if yes, and executing a step (4) if not; (4) comparing switch reading constant value information in the research range with the failure calculating result, and fining out all starting switches, motion switches and returning switches; (5) judging whether the motion switches exist, executing the step (6) if yes, and jumping to the step (7) if not; (6) tripping off the motion switches, and conducting the failure calculating; (7) taking time of next calculating, and jumping to the step (3); and (8) finishing.

Description

technical field [0001] The invention relates to the technical field of power system relay protection fixed value checking, in particular to an action simulation method for protection fixed value. Background technique [0002] The scale of modern power grid continues to expand, and the structure of the power grid is increasingly complex, which leads to an increasing workload of relay protection setting calculations, and makes the coordination of protection settings more and more difficult. [0003] During the setting calculation, the operation mode adopts several modes such as maximum, minimum and maintenance to briefly summarize all the operation modes, and the fixed value of the protection is calculated according to such operation mode. A large margin is generally considered in the calculation of the protection range and coordination relationship. All of these make the calculation accuracy of the protection setting limited, unable to adapt to the change of the power grid o...

AI Technical Summary

Problems solved by technology

All of these limit the calculation accuracy of the protection setting and cannot adapt to changes in the power grid operation mode. It is difficult to ensure that the setting and coordination of the setting are optimal.

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