A Robust IMFOGI Control for Power Quality Enhancement of a Dual Stage SPV-BES-BDC-SyRG DG Set Based Standalone Microgrid

Abstract

This paper focuses on the power quality improvement of a diesel generator (DG) in a standalone microgrid, in presence of local nonlinear loads that draw nonlinear currents. A standalone system comprising of a dual-stage solar photovoltaic (SPV) array, battery energy storage (BES) interfaced with a bidirectional converter (BDC), and a synchronous reluctance DG set is considered in this work. An improved mixed fifth-order generalized integrator (IMFOGI) based control algorithm is presented for control of the voltage source converter (VSC) of the SPV array. The IMFOGI control has enhanced filtering ability and it eliminates the dominant harmonic components and DC offsets from the load currents and point of common coupling (PCC) voltages and makes the DG set currents and voltages sinusoidal, even in the presence of nonlinear three-phase and single-phase loads. To extract maximum power from the SPV array, it is controlled by the incremental conductance (INC) algorithm. The DG set is run in the fuel economy zone (FEZ) for maximum fuel efficiency. The system performance with the presented IMFOGI control is analyzed in steady-state and dynamic conditions, in both simulation and hardware, using a Simulink model and experimental setup of the system prototype, respectively.

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Identifiers

DOI

10.1109/ECCE50734.2022.9947893

Journal

2022 IEEE Energy Conversion Congress and Exposition (ECCE)

Year

2022