In this paper, a new scheme using virtual zero sequence current of non-fault line is presented. This scheme can solve the problem that the ground distance relay can not measure the accurate fault distance. Because busbar voltage is influenced by zero current of neighborhood line when ground fault happened in one line of parallel double circuit line or double circuit line on the same tower. Under the condition of no using neighborhood current and extra AC input and connect line, the paper analyzes that this scheme is more adaptive in different faults than the neighboring zero current compensation scheme. The digital simulation result indicates that the scheme can be correctly used in high voltage transmission lines of parallel double circuit line and double circuit line on the same tower.%提出了一种采用虚拟零序电流方法,解决平行双回线、同杆并架双回线,一回线上发生接地故障时母线电压受两回线零序电流影响,接地距离继电器测量不正确的问题.该方法不引入相邻线零序电流,不增加交流输入及连线,比引入相邻线零序电流补偿的方法,在不同故障点具有更好的自适应性的优点.数字仿真结果表明:该方法可适用于具有相邻线互感的平行双回线、同杆并架双回线的高压输电线路.
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