Autonomous Control of Active Power Electronics Loads Considering Response Cost in Islanded Microgrid

摘要

In an islanded microgrid where the distributed generators (DGs) capacities are not very large and their output powers are fluctuating, a large capacity installation of energy storage system (ESS) is not ideal method due to its high price. Load control is a preferred control for supply and demand balance. At present, many load controls based on central management system have been proposed to achieve supply and demand balance according to the load capacities or price. However, these existing schemes are not suited for islanded microgrids without central controller. This paper proposes an autonomous control of flexible power electronics loads (FPELs), whose objective is to make the FPELs to automatically participate in supply and demand balance and reduce the response cost with various response prices taken into consideration. Therefore, the proposed control scheme can retain advantages of the traditional distributed load control schemes, while can keep in lower response cost. The effectiveness of the proposed control has been validated via Matlab simulations in islanded microgrid.