Abstract
The purpose of this paper is to present the control and simulation of a three-phase inverter. As alternative energy sources become more common, the need for an interface between the energy sources and the existing power generation grid increases. Three-phase inverters are commonly used to convert the dc electric energy generated by alternative energy sources to ac electric energy that is compatible with the utility system [1]. The general operation of a three-phase inverter will be presented in this paper. One way to track the phase of a three-phase utility inverter is to use a phase-locked loop (PLL) system [2]. From tracking the phase, the control of a three-phase inverter can be practically implemented using current control. Given a PLL system and current control algorithm, a Simulink model will be used to simulate the control of a three-phase inverter. Results from the Simulink simulation will be presented to demonstrate the implementation of the current regulation algorithm and PLL system on a three-phase inverter model.
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