中国电机工程学报2017，Vol.37Issue(23)：6811-6820,10.DOI:10.13334/j.0258-8013.pcsee.162628
双回不共端长距离输电线路零序参数测量方法
Measurement Method for Zero Sequence Parameters of Double-circuit Long Distance Transmission Lines Without Common Terminals
倪识远 1胡志坚 1杨安琪1
作者信息
- 1. 武汉大学电气工程学院,湖北省武汉市430072
- 折叠
摘要
Abstract
A new approach to measure the zero sequence parameters of double-circuit long distance transmission lines without common terminals was put forward.Considering the distribution effect and nonuniformity of the lines,a zero sequence line model was established and the related transmission line equations were derived.Based on global positioning system (GPS) technology,the voltages and currents were synchronous measured at two terminals of the lines and the port characteristic matrix was computed.The solution of the port characteristic equations was solved and twelve zero sequence parameter including zero sequence resistance,zero sequence inductance and zero sequence capacitance were obtained.To deal with the interferences of system white noise and induced voltage in field measurement,a comprehensive anti-interference method was proposed.TLS-ESPRIT algorithm and short time zero sequence step supply injection are employed to suppress the interferences.PSCAD simulation experiments are carried out to compare the proposed method and the conventional method.The simulation results show that the conventional method doesn't consider the nonuniformity of lines and is easily affected by distribution effect.The measurement errors of the conventional method increase with the increase of line length.While the proposed method considers the nonuniformity of lines and overcomes the influence of distribution effect and can be applied to long distance double-circuit transmission lines without common terminals.Moreover,the comprehensive anti-interference measure based on the proposed method can effectively eliminate the system white noise and induced voltage interferences,the measurement accuracy can satisfy the requirement of engineering measurement.关键词
双回不共端线路/非均匀传输线/分布参数模型/端口特性方程/零序参数/综合抗干扰Key words
double-circuit transmission lines without common terminals/nonuniform transmission lines/distributed parameter model/port characteristic formulae/zero sequence parameters/comprehensive anti-interference分类
信息技术与安全科学引用本文复制引用
倪识远,胡志坚,杨安琪..双回不共端长距离输电线路零序参数测量方法[J].中国电机工程学报,2017,37(23):6811-6820,10.
