高压直流输电线路保护

Protection on HVDC transmission line

高压直流输电线路保护的作用是为了迅速准确的检测到各种可能发生的故障，并采取相应的措施，消除和隔离故障，并保护电力一次设备不受损坏或减少设备损坏程度，尽量保持整个电网的稳定运行。各保护的保护范围相互重叠，各保护功能之间精确配合，完成对整个系统的覆盖，不产生保护盲区。

The function of protection is detecting varies of possible fault precisely and quickly and adopting countermeasures to elimi- nate and isolate the fault, which protect the power primary devices not damaged or reduce the damaging degree and maintain the stable operation of the whole power grid. The protection range of the protections is overlapped and the function of the protections should coop- erate precisely in order to cover the whole power system.