Abstract: With the planning and operation of Delingha (tuosu) - Haixi 750 kV line project, the delivery capacity of clean energy in Delingha, Haixi has been greatly improved, but the structure of Qinghai power grid has changed greatly, and the existing security and stability problems have also changed; After the commissioning of Delingha (tuosu) - Haixi 750 kV line project, this paper analyzes the safety and stability problems at the side of Delingha 750 kV substation at the transmission end, formulates reasonable control measures, and puts forward the control scheme of power grid stability control system and the configuration scheme of stability control device.