一种基于架空输电线路历史数据的过电压改善方法

Overvoltage improvement method on basis of historical data of overhead power transmission line

Abstract

The invention discloses an overvoltage improvement method on the basis of historical data of an overhead power transmission line, which is mainly characterized in that a flashover frequency section of the power transmission line is selected on the basis of the historical data; and according to a line transposition mode, a structural size of a tower and types and structural sizes of a wire and an overhead ground wire which are selected by the power transmission line, resistances, inductances and capacitances of a zero sequence and a positive sequence of the line are calculated by utilizing electromagnetic transient analysis, so that by integrating overvoltage calculations in various operating modes, one method for improving an overvoltage is disclosed and a corresponding strategy is called in a targeted manner, and thus, the overvoltage improvement method is beneficial for implementing differentiation design of the line.
本发明公开了一种基于架空输电线路历史数据的过电压改善方法,其主要特点在于,该发明基于历史数据选取所述输电线路的闪络频发段,根据线路换位方式、杆塔的结构尺寸,以及输电线路选用的导线和架空地线的型号及其结构尺寸,利用电磁暂态分析来计算线路零序和正序的电阻、电感,和电容,并进而综合多种运行方式下的过电压计算,提出一种用于改善过电压的方法,使得有的放矢地调用相应的策略,从而有利于实现线路差异化设计。

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