Through the test and analysis, the new topic of preventing incorrect action of protection in HVAC power network caused by commutation failure in DC converter station was discussed, and the effective countermeasures were put forward.

• 通过分析和试验,引出了超高压交直流电网并联运行时,如何防范直流换流站换流失败引起高压交流电网中继电保护不正确动作的新课题,并进行了探讨,提出了有效的防范措施。