Decentralized networked control for multi-generator interconnected power system automatic generation in the electricity market

Abstract

Decentralized networked feedback control laws are designed for Multi-generator Interconnected Power System Automatic Generation Control (AGC) which controlled over networks in the power market. The dynamic model of Interconnected Power System AGC is treated as an interconnected system with overlapping states. Using the mathematic framework of the Inclusion Principle, the interconnected system is expanded into a higher dimensional space in which the subsystems appear to be disjoint. Then, for the locally extracted subsystems with respect to network-induced time-delay and packet-dropout, by modeling the Networked Control System (NCS) as an Asynchronous Dynamic System (ADS) with rate constraints on events, the state feedback controllers are designed and the sufficient exponential stability criterion is derived. The design procedure is based on Linear Matrix Inequalities (LMI). As a final step, the decentralized controllers are contracted back to the original space for implementation. A 2-generator simulation example is given to show the effectiveness of the method.