多级合闸电阻限制1000 kV输电线路操作过电压的研究

电网电压等级的提高对输电线路操作过电压允许值提出了更加严格的要求。国内外超高压系统中普遍采用的附加单级合闸电阻限制操作过电压的方法,在特高压系统中已经很难满足。作者提出采用多级合闸电阻限制特高压线路的操作过电压,并用ATP-EMTP软件对国内第一条特高压交流输电试验示范工程晋东-南阳-荆门特高压交流输电工程中的1000kV输电线路操作过电压进行了分析研究,仿真结果与理论计算值相当接近。

Research on Limiting Switching Overvoltage by Multistage Closing Resistors in 1000 kV Transmission Lines

Adoption of higher voltage class makes more rigor request for allowable value of switching overvoltage of the transmission lines.The method to limit switching overvoltage in EHV transmission lines by additional single-stage closing resistor,which is common used home and abroad,can hardly adapt to the requirement of limiting allowable value of switching overvoltage in UHV transmission lines.The authors propose an approach to limit allowable value of switching overvoltage by multi-stage closing resistors.Taking the 1 000 kV AC transmission line from Southeast Shanxi via Nanyang in Henan province to Jingmen in Hubei province of the first UHV pilot project in China for example,the limitation of switching overvoltage in this transmission line by the proposed method is researched and simulated by ATP-EMTP software,and simulation results are very close to theoretical calculation results.