Abstract

A three-phase four-wire microgrid comprising of a solar photovoltaic (PV) array—battery energy storage—a diesel engine generator set (DEGS) is presented in this article. Here an enhanced adaptive filter (EAF) control and an incremental conductance (INC) maximum power point tracking algorithm are used to improve the power quality and to extract the maximum power from the PV array. The EAF control provides higher disturbance rejection capability over other controls. The EAF control is applied to the voltage source converter (VSC) to improve the power quality, such as compensation of harmonics, reactive power, and load unbalance. The INC control is used to harvest the PV array maximum power. For controlling the voltage output of the DEGS, an electronic automatic voltage regulator is provided at the synchronous generator field winding. The neutral current compensation is achieved by controlling the fourth-leg of VSC. This microgrid is simulated using MATLAB/Simulink tool. The robustness of the EAF control strategy is tested on a developed system prototype in the laboratory.

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