Robustness of Power-Imbalance Allocation Control for Power Systems

Abstract

We investigate the performance and robustness to noise of a centralized control called Power-Imbalance Allocation Control (PIAC) for secondary frequency control of a power system. The noise affects the frequency measurements and the communications. The impact of the noise on the synchronous state of the system is investigated. Analysis shows that the synchronized frequency deviation is proportional to the bias of the noise in the frequency measurements and gathering procedure of these measurements. With the noise considered as an input, the Input-to-State Stability (ISS) is proven for the closed-loop system.