Simple and quick relay protection action simulation method for power system

Abstract

The invention discloses a simple and quick relay protection action simulation method for a power system. The method comprises the following steps: providing a setting interface for a failure action simulation environment, and setting the simulation environment according to needs; identifying the set simulation environment, namely assigning values to corresponding variables to finish initialization work; performing simulation under conditions of different failure positions and different settings of an action refusing item; when a failure position is a special position, analyzing the advanced stripping or action refusing condition of line protection and bus protection; when the failure position is an ordinary position, and the action refusing item is circuit breaker action refusing, analyzing the action condition of protection in case of a circuit breaker failure; and when the failure position is an ordinary position, and the action refusing item is relay protection device action refusing, analyzing the condition of protection matching between upper-level and lower-level components. The method is simple and easy, unnecessary calculation is omitted, the operating time is shortened, a reference is provided for the check of relay protection setting, and a reliable result is obtained.

Description

technical field [0001] The invention belongs to the relay protection action simulation technology of electric power system, in particular to a simple and fast relay protection fault action simulation technology which comprehensively utilizes logic judgment and fixed value comparison method. Background technique [0002] In recent decades, with the increasing scale of the power grid, the structure of the power grid has become more and more complex, and its operation mode has also been diversified, which has greatly increased the complexity of the calculation work of relay protection setting. To ensure the correctness and reliability of relay protection setting values ​​under various operating modes, it is often necessary for dispatchers to check the protection configuration and setting values ​​to ensure that the protection can operate normally in the event of a fault in the actual system. [0003] At present, there are mainly two ways to verify the fixed value of relay prote...

AI Technical Summary

Problems solved by technology

[0005] At present, the simulation method based on the fixed value comparison method has a large amount of calculation, a long simulation running time, and a high price of the corresponding software. For some small users, this kind of method is too long and complicated, and the cost is too high; The simulation method of the method is greatly restricted by the network structure, and its application is not widely used.

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