Control design of grid-connected three-phase inverters

Abstract

Recently, there is a rapid growth in the deployment of both high and medium power converters to interconnect renewable energy resources to the network. These inverter-interfaced energy resources (IIERs) provide clean and green production of energy, which can be either connected to the grid or can operate in off-grid mode [1]. As the operating challenges related to intermittent power generation through these renewable sources of energy (like solar, wind, etc.) can be overcome by interconnecting these sources to the grid, hence this chapter elaborates the intelligent control technique of these inverters. A brief overview of various inverter topologies along with a detailed study of the control architecture of grid-connected inverters is presented. An implementation of the control scheme on two different testbeds is demonstrated. The first is the real-time (RT) co-simulation testbed and the second is the power hardware-in-loop testbed (PHIL). A test case for each of the testbeds is presented to demonstrate the ability of these testbeds.