1000kV特高压GIS变电站快速暂态过电压分析

Fast Transient Overvoltage Analysis of 1000 kV UHV GIS Substation

在我国开始研究特高压输电技术以前,只有前苏联、日本等少数国家建有1000kV电压等级的交流输电线路。前苏联1150kV交流系统的变电站使用开放式(AIS)布局。工程设计、关键技术研究与实际运行经验绝不牵涉特高压GIS变电站的快速瞬态过电压(VFTO)。1992年,日本规划建双回线特高压输电线路。1996年,通过GIS设备竣工1000kV信义变电站。其在特高压甚低频方面累积了多样的研究经验。但是因为负荷增长停滞,日本特高压系统始终运行于500kV,所以变电站VFTO与GIS设备的绝缘水平依然非常大。本文对于1000kV特高压GIS变电站迅速瞬态过电压展开了分析,供相关人员参照。

Before the study of UHV transmission technology in China,only a few countries such as the former Soviet Union and Japan had an AC transmission line with a voltage rating of 1000 kV.The substation of the former Soviet Union's 1150 kV AC system uses an open (AIS) layout.Engineering design,key technology research and practical operating experience are not involved in the rapid transient overvoltage (VFTO) of UHV GIS substations.In 1992,Japan planned to build a double-circuit UHV transmission line. In 1996,a 1000 kV Xinyi substation was completed through GIS equipment.He has accumulated diverse research experience in UHV and VLF.However,because the load growth is stagnant,the UHV system in Japan is always running at 500 kV,so the insulation level of the substation VFTO and GIS equipment is still very large.This paper analyzes the rapid transient overvoltage of 1000 kV UHV GIS substation for reference by relevant personnel.