Double-string insulator suspension angle optimization method based on insulator pollution accumulation characteristics

Abstract

The invention relates to a composite insulator suspension angle optimization method based on insulator pollution accumulation characteristics, and the method is characterized in that the method comprises the following steps: 1) carrying out the stress analysis of pollutant particles around an insulator; 2) determining the wind speed of the air flow field, the pollutant particle concentration and the change range of the particle size; 3) establishing insulator simulation calculation models under different suspension angles; 4) calculating air flow field distribution around the insulator at different suspension angles; 5) analyzing the change rule of the collision rate of the pollutant particles and the insulators at different suspension angles; and 6) determining the optimal suspension angle of the double-string insulator according to the simulation calculation result in the step 5). According to the method, based on the pollution accumulation characteristics of the insulator, the optimal suspension angle is determined through the pollution accumulation characteristics of the insulators at different suspension angles, and pollution flashover accidents of the insulators are preventedfrom happening in a suspension mode.

Description

technical field [0001] The invention relates to a method for optimizing the suspension angle of double-string insulators based on the fouling characteristics of insulators, in particular to a research method for the fouling characteristics of insulators based on Fluent finite element simulation calculation. Background technique [0002] As of June 2018, the power system of the State Grid Corporation of China has a total of 48,050 overhead transmission lines of 110 (66) kV and above, with a length of 941,514.39 kilometers. The environment is complex and changeable, and the electrical strength of the external insulation of overhead transmission lines is greatly reduced under weather conditions such as ice, snow, fog, dew, and light rain. , thus causing a large number of accidents such as broken strands of high-voltage wires, broken wires, and broken strings of insulators. In severe cases, accidents such as the collapse of transmission towers may also occur. [0003] In order ...

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Problems solved by technology

The power department and related researchers have studied the mechanical properties of V-string and inverted-V-string insulators, the fouling performance of ordinary insulators, and the electric field characteristics of insulators, but rarely optimize the suspension angle of insulators from the perspective of insulator fouling performance. , under different suspension methods, the suspension angle of the insulator has changed, so that the flow field around the shed of the insulator also changes, and finally the pollution characteristics of the insulator under different suspension angles are also different. Therefore, it is necessary to prevent the insulator from Optimal analysis of the suspension angle for pollution flashover accidents

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