Commutation failure is one of the most common failures for the high voltage direct currenttransmissionsystem.
在特高压直流输电中换相失败也是主要的故障。
2
Ceramic insulator is widely used in alternating and direct currenttransmissionsystem. But there exist some problems when using ceramic insulator in direct currenttransmissionsystem.
瓷绝缘子广泛使用在交直流输电系统中，但在直流输电系统中使用还存在很多问题。
3
The design of filtering equipments at dc side of the converter substations is relative to the security and economy of the high voltage direct current (HVDC) transmissionsystem.