A Novel Optimization Approach For Solving Optimal Load Shedding Problem Considering Different Voltage Stability Indices

摘要

Due to the increase in the complexity of the power system and the increase in electricity consumption. The power system no longer remains in equilibrium. In this paper, to restore the equilibrium in power system network, a proposal is made with the novel optimization technique to solve optimal load shedding problem by curtailing less amount of load at the optimal location and improving voltage profile. In this methodology, the risk of voltage instability and the critical buses are ranked based on NVSI. In this method, the NVSI constraint is used in the problem formulation in two ways: (a) New voltage stability index constraints added along with OPF formulation (b) Index is used in objective function formulation. The Modified Adaptive Harmony Search (MAHS) algorithm based on the improvisation of a musical tune approach is used to solve OLS strategies. The effectiveness of the proposed techniques is considered in terms of the location of load shedding and the amount of shedding. The effectiveness of the proposed method is tested on the standard IEEE-30 bus system. Simulation results show the minimum amount of load shedding using MAHS, while the NVSI provides an optimal load shedding location. By using this method, various power system blackouts can be prevented.