Probability evaluation method of failure caused by typhoon to power transmission line

Abstract

A probability evaluation method of failure caused by typhoon to a power transmission line is suitable for evaluating failure probability after the power transmission line is affected by the typhoon. The method mainly comprises the steps of quantitative evaluation on the power transmission line affected by the typhoon as well as environmental factors and probability modeling of the line failure caused by the typhoon. In the quantitative evaluation, ways of the failure caused by the typhoon to the power transmission line and key factors including inner factors (design strength, state and the like of lines) and outer factors (typhoon, terrain, rainfall and other factors) are mainly evaluated; and in the probability modeling, a reasonable failure probability model is mainly established to calculate the line failure probability corresponding to the quantitative evaluation results of the key factors. The probability evaluation method has the beneficial effects that the evaluation on various loads and real-time anti-wind capability of complicated lines and towers is avoided, the effect of the inner factors and the outer factors and the characteristics of the various failure ways are simultaneously considered, a mechanism that the failure of the line is caused by the typhoon is satisfied, and the capacity of a power system in defending the typhoon disaster is improved in combination with a wide-area measurement, analysis, protection and control system.

Description

technical field [0001] The invention belongs to the technical field of electric power system and automation thereof. Background technique [0002] The safe and reliable operation of transmission lines is closely related to weather and environment. First of all, due to the environmental constraints of the line corridor and other reasons, the line design has become increasingly compact and refined, and is easily affected by the meteorological environment; secondly, the climate has deteriorated from time to time in recent years, and new requirements have been put forward for the line operation to prevent severe weather conditions; in addition, The smart grid puts forward new requirements for the operation risk management of transmission lines. Therefore, it is necessary to study the impact of typhoons and other external disasters on transmission lines, evaluate the failure probability of lines, strengthen the meteorological environment risk management of transmission lines, an...

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Problems solved by technology

[0006] In recent years, the frequency of natural disasters has gradually increased, threatening the security and stability of the power grid. However, there is no probability quantitative evaluation technology that meets the requirements of online security analysis and early warning. Therefore, research and development of related technologies are urgently needed.

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