Extraction method of fault factor characteristics of electrical power system

Abstract

The invention relates to an extraction method of fault factor characteristics of an electrical power system, the method includes the following steps: a. choosing an initial variable, if a sample variance is smaller than a set threshold value, going to step b, otherwise going to step c; b. calculating a characteristic value and an unitized feature vector of the correlation coefficient matrix of the initial variable; c. calculating a covariance matrix of the initial variable, and the characteristic value and the unitized feature vector of the covariance matrix; d. if the characteristic value of the covariance matrix is smaller than the set threshold value, then going to step a, otherwise going to step e; e. calculating a common factor and a factor loading matrix of the initial variable; f. performing the orthogonal rotation or oblique rotation on the common factor; g. judging a fault element according to the coefficient feature and the scoring feature of the common factor. According to the invention, the fault factor characteristics of the electrical power system are extracted from real time measurement information in a WAMS (wide area measurement system), thus not only satisfying the requirement of a wide area back-up protection system on fault location real-time and accuracy,, but also having a strong anti-interference capability.

Description

technical field [0001] The invention relates to a method for extracting fault factor features from power system WAMS (Wide Area Measurement System) information under Weibull random interference, belonging to the technical field of power transmission and distribution. Background technique [0002] At present, the global environmental pollution and energy shortage require the power supply to change from quantity to quality, and new energy sources such as wind power have ushered in unprecedented development opportunities. [0003] New energy sources such as wind energy are inherently intermittent and volatile, so the connection of new energy sources to the grid will inevitably produce corresponding power fluctuations. The traditional power grid structure and operation mode are designed for the centralized production, dispatch and distribution of electric energy. When the proportion of new energy power generation is small, traditional power sources can compensate for these powe...

AI Technical Summary

Problems solved by technology

However, as the scale of renewable energy access increases, the resulting power fluctuations may exceed the regulation range of traditional power sources, thereby reducing the reliability of power supply and the stability of grid operation.

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