Study on Application of One Key Sequence Control in 750 kV Substation

In order to meet the reliability requirements of Xinjiang EHV power grid, improve the switching operation efficiency of EHV substation, and reduce the risk of misoperation, this paper determines the sequence control judgment based on different control modes and primary equipment, and proposes the design and application of one key sequence control in EHV substation by comparing the technology and economy of sensors, combining with anti misoperation host and intelligent operation order technology. On the premise of ensuring safety, it can effectively reduce the operation and outage time, reduce the misoperation rate, thus reduce the accident rate of power grid, and prevent large-scale blackout, which has certain guiding significance for the subsequent scheme design of EHV substation.