双回耦合输电线路的零序参数在线测量  

Online measuring of zero-sequence parameters for coupled double-circuit transmission line

作　　者：梁志瑞[1] 宫瑞邦[1] 牛胜锁[1] 赵飞[1] 张思为[1] 

机构地区：[1]华北电力大学新能源电力系统国家重点实验室,河北保定071003

出　　处：《电力自动化设备》2013年第7期70-74,共5页Electric Power Automation Equipment

摘　　要：分析了双回耦合输电线路的结构,建立了其零序分布参数电路模型和"双Π形"零序集中参数电路模型;将增量法与"双Π形"电路相结合,提出了零序集中参数在线测量算法;推导了零序集中参数与分布参数间的转换关系,提出了零序分布参数在线测量算法;对不同长度的500 kV双回耦合输电线路进行仿真实验。仿真结果表明,所提出的电路模型及在线测量算法适用于电力系统的零序参数在线测量。The structure of coupled double-circuit transmission line is analyzed and its circuit model of zero-sequence distributed parameters and double-∏-shaped circuit model of zero-sequence lumped parameters are built. By combining the increment method with the double-∏-shaped circuit model,an algorithm is developed for the online measuring of zero-sequence lumped parameters. The conversion relationship between zero-sequence lumped parameters and distributed parameters is deduced,based on which,an algorithm is proposed for the online measuring of distributed parameters. Simulative experiments are carried out for 500 kV coupled double-circuit transmission line with different lengths. The simulative results show that the proposed circuit model and online measuring algorithms are applicable to the online measuring of power system zero-sequence parameters.

关 键 词：在线测量 零序参数 分布参数 集中参数 双Π形 电路模型 输电 

分 类 号：TM934[电气工程—电力电子与电力传动]