Present status and prospect of HVDC transmission in China.

中国直流输电的现状及展望。

HVDC test is one of routine tests on the converter transformer.

高压直流试验是换流变压器的例行试验之一。

PI control policy is commonly used for conventional control of HVDC.

HVDC系统的常规控制普遍采用PI控制策略。

Control and protect section is the most pivotal section in HVDC system.

高压直流输电系统中最关键的部分是控制保护部分。

The new features of modern HVDC converter valves are introduced briefly.

介绍了现代HVDC换流阀的设计特点及新增特性。