高压电器2011，Vol.47Issue(4)：17-22,6.
隔离开关不同操作方式产生的快速暂态过电压
Very Fast Transient Overvoltage Caused by Different Switching Modes of Disconnector
摘要
Abstract
Operating experiences have shown that the very fast transient overvoltage (VFTO) caused by switching operations in extra high voltage gas insulated substation (GIS) threatens the security of power system. For a 550 kV GIS, the model has been built up and the parameters have been selected in this paper. Taking different operating modes into consideration, the magnitudes and frequency spectrum of VFTO along GIS nodes have been calculated by using EMTP. The relationships between switching modes and VFTO have been founded. The protective effect on VFTO of parallel resistor has also been studied. It is shown that the VFTO caused by opening operations are even higher than those caused by closing operations. Switching conditions and operating modes would exert an influence on VFTO, even for the node of the switches operated. The VFTO caused by switching one bus to the other is the most severe. Parallel resistors could accelerate the attenuation of overvoltages, the magnitudes of which will be less than 1.6p.u., when the resistance is more than 200 Ω.关键词
气体绝缘变电站/快速暂态过电压/操作方式/并联电阻Key words
GIS/ VFTO/ switching modes/ parallel resistor分类
信息技术与安全科学引用本文复制引用
刘青..隔离开关不同操作方式产生的快速暂态过电压[J].高压电器,2011,47(4):17-22,6.基金项目
陕西省教育厅科研计划资助项目(项目批准号09JK578). （项目批准号09JK578）
