Multiple Single Phase Inverters Based Combined Active Power Management and Voltage Regulation of Power Distribution System Based on A Novel Optimal Control Architecture

Abstract

This paper presents a novel approach to power sharing methodology for parallel connected single phase inverters (SPIs) using Alternating Direction Method of Multipliers (ADMM) based identification of multiple input and multiple output (MIMO) system and subsequent optimal control strategy. The idea is evolved from the universal droop controller that can be applied to inverters considering output impedance. The architecture has two control loops: the primary inverter control topology is based on the d-q frame active and reactive power control and the secondary control generate virtual active and reactive powers references using voltage deviations and power unbalance obtained from the ADMM identified transfer functions. The advantages and capabilities of the architecture is evaluated on IEEE 123-bus system for regulating voltage deviations during load changes and other adverse conditions.