Study on huge power grid online operation trend assessment system

Online dynamic security analysis conclusion is lagging power grid operation mode changes, and contradictions with the timeliness of power grid real-time scheduling and operation control have become increasingly prominent. To solve the problem, framework of power grid online operation trend analysis system is constructed, and three advanced technologies are researched, including future power flow algorithm based on controlling power of multi transmission section simultaneously, operation trend analysis method based on stability assessment index and multiple fault coordination control method. Huge power grid online operation trend analysis system is developed, and timeliness problem of the online security analysis is solved. The system has realized the change from the accident alarm, emergency control to accident early warning, prevention and control. It can predict future operation state of power system, and pre-control operation risk of power system.