Joint Frequency Regulation and Economic Dispatch Using Limited Communication

Abstract

We study the performance of a decentralized integral control scheme for joint power grid frequency regulation and economic dispatch. We show that by properly designing the controller gains, after a power flow perturbation, the control achieves near-optimal economic dispatch while recovering the nominal frequency, without requiring any communication. We quantify the gap between the controllable power generation cost under the decentralized control scheme and the optimal cost, based on the DC power flow model. Moreover, we study the tradeoff between the cost and the convergence time, by adjusting parameters of the control scheme.Communication between generators reduces the convergence time. We identify key communication links whose failures have more significant impacts on the performance of a distributed power grid control scheme that requires information exchange between neighbors.

Fallback Strategies in Operation Control of Microgrids with Communication Failures

“…Particularly in remote MGs, disconnecting the units and rescheduling the power generation with the remaining units could be costly. A recent paper that addresses controller design with CFs is [14]. A decentralised control that can achieve near-optimal performance without any communication is proposed.…”