Research of load shedding algorithm based on minimizing power outage cost

This paper presents the optimal load shedding model based on minimizing power outage cost and observing system safety and stability restriction during power shortage. With equation restriction and inequation restriction, this model belongs to optimal power flow. A novel optimization algorithm for the model is also presented. Applying improved approximate programming method, optimization is done in the control variable space. Through the sensitivity equation of status variable to control variable, the system objective function and restriction can be linearized at the starting feasible operation point, the control variable can be amended using linear programming method which is simplified by active restriction identifying, the new operating point can be obtained by solving power flow equation. The process is iterated until the operating point converges at the optimal solution. Also, the proposed method has been validated on IEEE 14-bus test system and IEEE 30-bus test system.