向家坝—上海±800kV特高压直流保护功能研究

DC Protection of±800 kV UHV DC Project from Xiangjiaba to Shanghai

特高压直流输电对直流保护系统提出了更高的要求,良好的保护系统应能以最快速度检测到故障并正确动作,将对系统的影响降至最小。在论述特高压直流保护的特点及配置原则的基础上,给出了向家坝—上海±800 kV特高压直流输电示范工程直流保护的分区结构,并分别对各个分区的功能配置进行了阐述,给出了各区域的保护配置示意图,并着重分析了特高压直流特有的保护原理及实现。

The development of UHV DC transmission demands that DC protection system should detect faults immediately and react correctly in order to minimize the damage to system.Based on the characteristic and principle of UHVDC protection,the protection zones of±800 kV UHV DC project from Xiangjiaba to Shanghai are formulated.The functions,implementations and sketch maps of DC protection in every zone are described,with focus on the concept,the principle and the functions of UHV DC protection.