Dianci bileiqi, 2008 针对雷击输电线路引起站内电气设备产生过电压的问题,提出了四种不同的保护方案,通过ATP软件仿真,对站内变压器、电抗器、CVT及GIS入口各方案下的电压进行保护裕度和经济性分析,得出在进线入口处装一组敞开式避雷器,和在单元主变压器附近装设一组封闭式避雷器,可以有效降低雷电侵入波过电压;利用分形理论对各方案下变压器的电压波形进行分形维数和Kolmogorov熵的比较,得出K熵与保护裕度之间存在正相关性;提出利用分形学波形特征可进行保护方案的选择,即当P≥Pi时,符合设计要求。
李毅, 周力行
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