A method for evaluating the safety risk status of transmission lines

Abstract

The invention discloses a transmission-line security risk state evaluation method. The transmission-line security risk state evaluation method comprises the following steps of building a line danger source occurrence probability model gamma {T, alpha<k>, k=1, 2, ... , 12, beta}, wherein the line danger source occurrence probability model comprises a parameter danger source type T, a type beta of line faults leading to danger sources, and the occurrence probability alpha<k> of each month of a year, wherein k=1, 2, ... , 12; determining the occurrence probability E<1> of the first type of faults of a sectional line, wherein E<1> satisfies the equation (please see the equation in the specification), and determining the occurrence probability E<2> of the second type of faults of the sectional line, wherein E<2> satisfies the equation (please see the equation in the specification); determining the security risk state of the line through the occurrence probability E<1> of the first type of faults and the occurrence probability E<2> of the second type of faults. According to the transmission-line security risk state evaluation method, on the basis that the line danger source occurrence probability model is built, transmission-line security risk state evaluation is achieved by combining line fault cost, and assistant decision-making data are provided for patrol work arrangement of the line according to an evaluation result.

Description

technical field [0001] The invention relates to the field of power system analysis, in particular to a method for evaluating the safety risk state of a power transmission line. Background technique [0002] With the development of society and economy and the expansion of power consumption scale, the scale of transmission network is also increasing rapidly, especially the large-scale high-voltage transmission lines. At the same time, the environment of transmission lines is becoming more and more complex, and the factors that affect the safe operation of transmission lines are regional and seasonal. , randomness and other characteristics make the reliability guarantee of transmission lines a difficult problem. At the same time, the power operation and maintenance guarantee department is limited by labor costs, and cannot timely and comprehensively inspect the transmission lines, resulting in the failure to effectively control the safety risks of the transmission lines, and th...

AI Technical Summary

Problems solved by technology

However, since the line status assessment is completely dependent on the qualitative scoring of manual experience, the scoring for different transmission lines is relatively random and lacks generalizability

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