Decentralized control of power system zones based on probabilistic constrained load flow

Modern power systems are characterized by high uncertainty. The paper presents a method for a network constrained setting of control variables in independent or weakly coupled power zones based on probabilistic load flow (plf) analysis. Plf is applied in order to provide the complete spectrum of all probable values of the state and output variables, such as bus voltages. The network is divided into clusters in order to create zones with the minimum power exchange and interaction with their neighboring zones. The zone controllers are adjusted in order to act independently from other zone controllers in order to eliminate the limit violations of the constrained variables. The method is applied to the IEEE 118-bus system. The results show the performance of graph partitioning and the ability of the method to provide the appropriate control actions in order to satisfy all physical and operating constraints of the power system.