摘要
针对电站山坡电缆沟遭受雷击的情况,着重分析了雷电直击山坡电缆沟中高压电缆时,高压电缆缆芯及二次电缆屏蔽层的电磁耦合情况。运用ATP-EMTP电磁仿真软件,建立高压电缆分布式参数模型,分析高压电缆缆芯的感应电压,同时分析二次电缆接地方式对电磁耦合的影响;针对屏蔽层附加电流的影响,提出合理的避雷针与电缆沟的铺设距离。
In view of the lightning strikes on the hillside cable trench of a power station, the electromagnetic coupling between the high voltage cable core and the secondary cable shielding layer under the condition that the lightning strikes the high voltage cable in the hillside cable trench is emphatically analyzed. Using ATP-EMTP electromagnetic simulation software, the distributed parameter model of high voltage cable is established to analyze the induced voltage of high voltage cable core. At the same time, the influence of grounding mode of secondary cable on electromagnetic coupling is analyzed. In view of the influence of the additional current in the shielding layer, the reasonable distance between the lightning rod and the cable trench is put forward.
作者
张永会
郑智勇
高海鸥
张淼
ZHANG Yonghui;ZHENG Zhiyong;GAO Haiou;ZHANG Miao(Baishan Power Plant, Huadian 132400, China;Changsha Kezhi Lightning Protection Company, Changsha 410000, China;Changsha University of Science and Technology, Changsha 410004, China)
出处
《电瓷避雷器》
CAS
北大核心
2018年第2期135-139,144,共6页
Insulators and Surge Arresters
