关于500kV变压器低阻抗保护配置的看法

Some opinions on the configuration of low-impedance protection for 500kV transformer

目前 ,5 0 0kV系统联络变压器后备保护的配置 ,存在着一定的缺陷 ,整定配合困难 ,动作时间长 ,对系统安全运行不利。因此 ,就此问题 ,介绍了有关系统联络变压器后备保护的配置设想 ,可缩短保护动作的时间 ,增加了保护的动作范围 ,大大提高了电网安全运行的可靠性。

For the configuration of 500kV transformer backup protection, it exits some shortcomings which make it be difficult to set, long term to operate and unsafe to the system operation. Therefore, a configuration principle on the backup protection of system coupling transformer is presented in this paper which can shorten its operating time , enlarge its operating range and improve the operating reliability of the power network.