Modeling and fault locating method for non-uniform line of power grid

Abstract

The present invention discloses a modeling and fault locating method for the non-uniform line of a power grid. The method comprises the steps of establishing a non-uniform line model by utilizing the PSCAD technique according to the characteristics of a non-uniform line; setting parameters; determining a modeling and fault locating method for the non-uniform line; constructing a non-uniform line algorithm in a fault locating system; conducting the fault simulating and positioning treatment on the established non-uniform line; verifying the necessity and the accuracy of the established non-uniform line; establishing the fault locating system containing the non-uniform line; and testing the fault locating function. According to the technical scheme of the invention, the non-uniform line model is additionally arranged inside the fault locating system, so that the fault locating accuracy and the fault locating effectiveness are improved. Meanwhile, the fault locating function for lines of different type parameters is realized. Moreover, the method is small in algorithm calculation amount and fast in calculation speed.

Description

technical field [0001] The invention belongs to the field of power systems, and in particular relates to a method for modeling and fault location of non-uniform lines in a power grid. Background technique [0002] For many years, transmission line fault location has been a concern of power system researchers and power equipment manufacturers. Real-time and accurate fault location plays an important role in quickly finding fault points, repairing damaged lines, and improving system reliability. However, due to too many influencing factors and uncertainties, so far, there is still a lot of work to be done in this field, especially for lines with non-uniform parameters. After investigation and research, many transmission lines are reconstructed lines. The wire types of the lines are different. The same line may have many parameters, that is, non-uniform lines. If only the previous fault location method is used, it is difficult to guarantee the accuracy of the location informat...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for modeling and fault location of non-uniform lines in the power grid, aiming at solving the problem that the current power grid fault location system does not consider the combined lines of different types of the same line, and uses a single uniform line for non-uniform lines. The problem of not being able to locate faults on grid lines in real time and accurately

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