Optimization of Power Stability Index and its Application in Load Shedding

Abstract

This paper presents a load shedding method to optimize the Power Stability Index (PSI), with the objective of enhancing the stability of microgrid power systems. In instances where the system encounters demand that exceeds its operational capacity, the loads in the power network are selectively curtailed to ensure that this index remains within acceptable limits. This approach ensures power balance, frequency stability, and a more efficient load-shedding process. To address this issue, the paper proposes a comprehensive PSI optimization method, where PSI is used not only as an evaluation metric but also as a key optimization variable to improve decision-making effectiveness. The Particle Swarm Optimization (PSO) algorithm is employed to determine the optimal load-shedding power that would satisfy operational constraints. This method leverages PSI to enhance the accuracy of load-shedding decisions and improve the adaptability and stability of the microgrid system under fluctuating load conditions. The effectiveness of the proposed method is validated on the IEEE 16-bus microgrid test system, thereby demonstrating its feasibility and efficiency.