Subject：Analysis several 110KV, 220KV DC power loss accidents and their crucial results, gives three technical resolutions, such as integrated protection calculation,
increased protection configuration, etc. According? to several power network practices, gives various emergency protection resolutions for the loss of DC power supply, especially prevents the problem expansion and resolves equipments burnt problem. These resolutions guarantee power system safety running, protect main equipments crashing, maximum improve the stability of power supplying systems.???? Key Words: DC Power Loss? Relay Protection Emergency? Technology?

摘要：通過對幾個110KV站、220KV變電站直流電源消失引發嚴重事故的剖析，針對直流電源消失帶來的惡性后果，從保護整定計算、新增保護配置等不同方面，分別提出三種技術應對措施，針對不同的電網實際情況，從而有效解決直流電源消失引發的嚴重后果，特別是解決因故障不能及時切除而造成事故范圍擴大和設備燒損問題，這樣對電力系統安全穩定運行，提高供電可靠性有著十分重要的現實意義。

關鍵詞：直流電源消失繼電保護應急技術措施