特高压GIS系统空载长线合闸极快速暂态过电压研究  

Study on Very Fast Transient Overvoltage of Closing No-Load Long Lines on Ultra High Voltage GIS System

作　　者：叶波[1] 尹玉鹏[1] 陈仕龙[1] 曾芳[1] 李鸣[1] 龙丹[1] 肖丹[1] 何庭一[1] 

机构地区：[1]昆明理工大学电力工程学院,云南昆明650500

出　　处：《昆明理工大学学报（自然科学版）》2013年第1期59-64,71,共7页Journal of Kunming University of Science and Technology(Natural Science)

基　　金：国家自然科学基金项目(51105183);教育部高等学校博士学科点专项科研基金项目(20115314120003);云南省应用基础研究基金项目(2010ZC050)

摘　　要：特高压变电站气体绝缘组合电器(Gas Insulated Switchgear,GIS)系统在切合容性电流时电磁暂态过程和极快速暂态过电压(Very Fast Transient Overvoltage,VFTO)的变化极快且极为复杂,需对其发展过程和特性进行研究,并探寻有效的抑制措施.对GIS系统空载长线合闸过电压进行详细分析,建立精确描述特高压GIS系统空载长线合闸极快速暂态过程的仿真模型,并对特高压输电示范工程晋东南-南阳-荆门1 000 kV输电线路空载合闸极快速暂态过电压进行分析计算.仿真计算没有附加合闸电阻和避雷器、附加单级合闸电阻、附加多级合闸电阻、在线路两端加装避雷器、在线路两端和中部加装避雷器、附加多级合闸电阻且在线路两端和中部加装避雷器时特高压GIS系统空载长线合闸极快速暂态过电压.仿真结果表明,附加多级合闸电阻且在线路两端和中部加装避雷器能有效抑制特高压GIS系统空载长线合闸极快速暂态过电压.When the gas insulated switchgear （GIS） system is adopted in the ultra high voltage （UHV） substa- tion to switch lines with capacitive current, the variations of the electromagnetic transient process and very fast transient overvoltage （VFTO） are very fast and extremely complex. The development process and characteristics of VFTO remain to be dealt with to seek effective suppression measures. The overvoltage of closing no - load long lines on GIS system is analyzed in detail. The simulation model of the very fast transient process of closing no - load long lines on UHV GIS system is then established. The VFTO of closing no - load China UHV transmission demonstration project Jindongnan -Nanyang- Jingmen 1000 kV transmission lines is also analyzed. The VFTO of closing no -load long lines on UHV GIS system is simulated and calculated under various conditions, when the system has no additional closing resistors and lightning arresters, additional single stage closing resistors, ad- ditional multistage closing resistors, lightning arresters in two terminals of lines, lightning arresters in two termi- nals and the middle of lines, and additional multistage closing resistors and lightning arresters in two terminals and the middle of lines. The simulation results show that the additional multistage closing resistors and lightning arresters in two terminals and the middle of lines can effectively restrain the VFTO of closing no - load long lineson UHV GIS system.

关 键 词：特高压 GIS系统 空载长线合闸 极快速暂态过电压 

分 类 号：TM743[电气工程—电力系统及自动化]