Comprehensive estimation method of natural disaster flashover risks of power transmission circuit

A technology for transmission lines and natural disasters, which is applied in the field of comprehensive evaluation of transmission line natural disaster flashover risks, can solve problems such as inconsistent evaluation indicators, single natural disasters, and no unified evaluation model, so as to reduce work complexity and workload Effect
CN107316129AActive Publication Date: 2017-11-03STATE GRID SHAANXI ELECTRIC POWER RES INST +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
STATE GRID SHAANXI ELECTRIC POWER RES INST
Publication Date
2017-11-03

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Abstract

The invention discloses a comprehensive estimation method of natural disaster flashover risks of a power transmission circuit. The method comprises steps of based on research on the models of lightening strokes, ice flashover l, pollution flashover and wind deviation flashover of the traditional power transmission circuit, calculating flashover probability of the power transmission circuit under the current natural disaster condition; determining load loss after the flashover faults of the circuit; and finally, taking the ratio of the load loss to the power utilization load of a power grid as a risk value and carrying out grading division, thereby achieving comprehensive estimation on different types of natural disaster flashover risks of the power transmission circuit. According to the invention, a unified and quantitative reference basis is provided for disaster prevention and reduction work of different types of natural disasters of the power transmission circuit.
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Description

technical field

[0001] The invention belongs to the field of disaster prevention and mitigation of power grids, and in particular relates to a comprehensive evaluation method for natural disaster flashover risks of power transmission lines. Background technique

[0002] Transmission lines operating outdoors are exposed to the atmospheric environment for a long time, and are easily affected by natural disasters such as lightning strikes, icing, pollution, and strong winds, and the risk of tripping is relatively prominent. At present, domestic and foreign scholars have carried out a lot of research work on the assessment of transmission line flashover risk under the influence of different natural disasters.

[0003] In the evaluation of lightning flashover, the procedure method, electrical geometric model or lightning leader development model are often used to analyze the lightning resistance performance of transmission line shielding; in the evaluation of ice flashover, the m...

Claims

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