A risk assessment method for transmission line tripping under typhoon disaster

Abstract

The invention relates to a risk assessment method for wind deflection tripping of transmission lines under typhoon disasters, which includes inputting typhoon information in the research area, design information and environmental information of each transmission line, and the design information of transmission lines includes transmission line tower information and line conductor information and suspension insulator string information; use the Monte Carlo method and the rigid body straight rod method to establish a calculation model for the wind deflection trip probability of the transmission line insulator string under the typhoon disaster; input the required information into the established model to obtain the transmission line The trip probability of insulator string wind deflection under this typhoon is used to guide the pre-disaster work and the prediction of power outage loss after the disaster. The present invention is applicable to the situation where typhoons do not have a fixed wind field, and has a good prediction effect for unknown typhoons, and can obtain the wind deviation trip probability of the entire transmission line insulator string under typhoon disasters, and is useful for guiding disaster prediction and transit before typhoons pass Post-material dispatch and power outage loss prediction have important guiding significance.

Description

technical field [0001] The invention relates to the field of risk assessment of electric power systems, in particular to a risk assessment method for wind deflection tripping of transmission lines under typhoon disasters. Background technique [0002] Transmission lines have the characteristics of many points, wide areas, and being exposed to the wild for a long time. Their safe and stable operation is closely related to the climate and environment in which they are located. In recent years, typhoon disasters have not only occurred more and more frequently, but also their level has become higher and higher, which has brought serious threats to transmission lines. China is located in the western Pacific Ocean and is more severely affected by typhoons, and the southeastern coastal areas are more vulnerable to typhoon disasters. According to statistics, under typhoon disasters, the main causes of transmission line fault tripping include: wind deflection, floating objects, dama...

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Problems solved by technology

[0005] The present invention mainly solves the problems of lack of simulation of typhoon wind field, small coverage of research objects, and lack of possibility of wind deviation tripping of the entire transmission line and a certain tower in the existing risk assessment method of transmission line under typhoon disaster. Insufficient research and other issues, a risk assessment method for wind deflection tripping of transmission lines under typhoon disasters is proposed. Random sampling of typhoon wind speed and wind direction angle is carried out through Monte Carlo method to simulate typhoon wind field; through collection and research of transmission lines and towers Based on the design information and terrain information, the wind trip probability of each straight pole tower and the entire transmission line insulator string is calculated, which is used to guide the pre-disaster work and the prediction of post-disaster power outage losses

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