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基于可变电压的输电线路污闪自动防御方法

DOI: 10.13336/j.1003-6520.hve.2015.04.037, PP. 1349-1356

Keywords: 污闪,变压器,自动防御,盐密,临界污闪电压,输电线路

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Abstract:

为了减小污闪对电网正常运行的影响,提出了1种基于可变电压的输电线路污闪自动防御方法。介绍了输电线路污闪自动防御系统的构成和工作原理,建立了输电线路污闪自动防御系统数学模型,研究了普通型绝缘子临界污闪电压的计算模型,选择XP-160型绝缘子进行了不同盐密下污闪电压值的实例计算,最后采用改进IEEE9节点系统及某实际电网进行了数字仿真验证。研究结果表明调压前后线路线损、无功损耗均变化较小,且降压运行后线路电流没有超过允许载流量,调压后母线端电压变化幅度均<5%,这说明调压过程对电网正常运行的影响很小,所提方法可以在保证电网正常工作的前提下实现输电线路的防污闪。

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