2017/11/20 by Weitenberg, Erik, Yan Jiang, Changhong Zhao +8
Engineering · #Power System Optimization and Stability #Frequency Control in Power Systems #Microgrid Control and Optimization
paper · pdf · doi:10.48550/arxiv.1711.07332
Frequency restoration in power systems is conventionally performed by\nbroadcasting a centralized signal to local controllers. As a result of the\nenergy transition, technological advances, and the scientific interest in\ndistributed control and optimization methods, a plethora of distributed\nfrequency control strategies have been proposed recently that rely on\ncommunication amongst local controllers.\n In this paper we propose a fully decentralized leaky integral controller for\nfrequency restoration that is derived from a classic lag element. We study\nsteady-state, asymptotic optimality, nominal stability, input-to-state\nstability, noise rejection, transient performance, and robustness properties of\nthis controller in closed loop with a nonlinear and multivariable power system\nmodel. We demonstrate that the leaky integral controller can strike an\nacceptable trade-off between performance and robustness as well as between\nasymptotic disturbance rejection and transient convergence rate by tuning its\nDC gain and time constant. We compare our findings to conventional\ndecentralized integral control and distributed-averaging-based integral control\nin theory and simulations.\n