摘要
通过建立拉西瓦水电站750kV气体绝缘输电线(GIL)和气体绝缘变电站(GIS)系统的仿真计算模型,计算了该GIL-GIS系统在几种典型运行方式下由隔离开关操作引起的陡波前过电压(VFTO),结果表明,由于该GIS的特殊结构,其VFTO的水平较一般GIS要低。另外还分析了残留电荷、隔离开关并联电阻、主变压器等值入口电容等因素对VFTO的影响,讨论了有效抑制VFTO的措施。
The simulation models of the 750 kV gas insulated transmission lines （GIL） and gas insulated substation （GIS） system in Laxiwa hydropower station are established. The very fast transient overvoltage （VFTO） generated during disconnector operation of several running modes is calculated. The simulation results indicate that the VFTO level is lower than that in some other common GIS for its specific configuration. Factors of trapped charge, parallel resistor of disconnector, equivalent entrance capacitance of power transformer influencing VFTO are analyzed. Some available suppression methods are discussed.
出处
《华北电力大学学报（自然科学版）》
CAS
北大核心
2006年第5期6-10,共5页
Journal of North China Electric Power University：Natural Science Edition
基金
河北省自然科学基金资助项目(503424).
关键词
EMTP
GIS
GIL
操作过电压
陡波前过电压
EMTP
gas insulated substation
gas insulated transmission lines
operation overvoltage
very fast transient overvoltage （VFTO）
