摘要
分析了一起雷电波入侵电缆造成护套保护器损坏的原因,运用ATP-EMTP搭建了雷电侵入波作用下架空线与电缆相连(包括母线侧的各种电器设备)的简化模型。通过仿真计算,电缆护层末端接地和首端直接接地两种接地形式下的过电压分别为10kV和9.3kV,选出适合的国产保护器型号为Y5WC-5/13.5。
A lightning wave invasion to electric cable made sheath protector damaged. Through this accident, the main cause for it is analyzed. Under the function of lightning incoming surge, simplified ATP-EMTP model of overhead line connected with the electric cable and various electrical equipments at bus side is built, Over-voltages in both earthing modes, i.e. earthing at cable sheath start or end, were obtained by calculation as 10 kV and 9.3 kV respectively. The proper domestic protector is chosen as YSWC-5 / 13.5.
出处
《电瓷避雷器》
CAS
2008年第5期23-25,共3页
Insulators and Surge Arresters
