高压电器2017，Vol.53Issue(7)：13-18,6.DOI:10.13296/j.1001-1609.hva.2017.07.003
1000kV皖南—浙北特高压线路零序参数测试
Zero Sequence Parameter Measurement of 1 000 kV Wannan-Zhebei UHV Transmission Line
摘要
Abstract
Zero sequence parameter of transmission line is an important foundation for short-circuit current calculation on open phase running,opening and closing current calculation on open phase running,short-circuit ground fault location,and zero sequence protection setting calculation.For the interference problem of zero sequence parameter measurement in 1 000 kV Wannan-Zhebei UHV transmission line,in this paper,a "shunt capacitor compensation combined with large-capacity variable-frequency power source" measuring method is proposed.Test data analysis results show that the use of large-capacity power source can improve the signal-to-noise ratio of measuring signal,and reduce the influence of the interfering voltage caused by adjacent lines.The use of parallel capacitance compensation method can reduce the influence of the induced current caused by adjacent lines on the impedance parameter measurement.The measurement results of power frequency method and non-power frequency method is closer,but there are some differences between the test results and the calculated values.For the zero sequence parameter test of Wannan-Zhebei UHV transmission line,it is appropriate to adopt the test results obtained by non-power frequency method.Field test results verify the effectiveness of the proposed zero sequence parameter measurement method.关键词
皖电东送/特高压/同塔双回/工频参数/零序阻抗/零序电容Key words
Anhui-to-East power transmission/ultra high voltage (UHV)/double-circuit line on same tower/frequency parameter/zero sequence impedance/zero sequence capacitance引用本文复制引用
王少华,姜文东,胡文堂,周象贤,李特,吴尊东..1000kV皖南—浙北特高压线路零序参数测试[J].高压电器,2017,53(7):13-18,6.基金项目
国家电网公司科技项目(SGJLJSFW[2013]494).Project Supported by Science and Technology Foundation of SGCC(SGJLJSFW[2013]494). （SGJLJSFW[2013]494）
