摘要
通过比较不同型号良导体地线的波阻抗,分析了零序阻抗对不对称接地工频过电压的影响。计算了各种采用光缆复合架空地线情况下线路的工频过电压。指出利用良导体地线降低工频过电压可以减小线路并联补偿容量,降低安装成本和维护费用。最后分析了良导体地线降低工频过电压的制约因素。
The influence of zero-sequence impedance on power-frequency overvoltage of asymmetric eathing fault is researched though comparing surge impedance of different types of ACSR as ground-return wires. The power-frequency overvoltage is calculated in various conditions with OPGW. It is lower for the smaller surge impedance of ACSR consequently, parallel compensation capacity could be decreased to save the cost. The restrictions of using ASCR to limit power-frequency overvoltage are analyzed too.
出处
《高压电器》
CAS
CSCD
北大核心
2004年第3期186-188,共3页
High Voltage Apparatus
关键词
工频过电压
良导体地线
零序阻抗
power-frequency overvoltage
aluminum clad steel reinforced(ACSR)
zero-sequence impedance
