Improved Droop Control with Washout Filter

Yalong Hu and Wei Wei
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Yalong Hu: College of Electrical and engineering, Zhejiang University, Hangzhou 310027, China
Wei Wei: College of Electrical and engineering, Zhejiang University, Hangzhou 310027, China

Energies, 2018, vol. 11, issue 9, 1-18

Abstract: In this paper, a droop washout filter controller (DWC), composed of a conventional droop controller and a washout filter controller, is proposed. The droop controller is used to ensure the “plug-and-play” capability, and the droop gain is set small. The washout filter is introduced to compensate the active power dynamic performance (APDP). Compared to the droop controller, the DWC can achieve accurate active power sharing and smaller frequency difference without losing the APDP. Additionally, a novel modeling technology is proposed, using which a small-signal model for an island microgrid (MG) is constructed as a singular system. The system’s stability is analyzed and the DWC is verified using real-time (RT-LAB) simulation with hardware in the loop (HIL).

Keywords: microgrid (MG); droop control; washout filter; hardware in the loop (HIL) (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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