Dynamic Phasor-Based Modeling and Simulation of a Reduced-Order Single-Phase Inverter in Voltage-Controlled and Current-Controlled Modes

This paper presents the dynamic phasor (DP) models of a single-phase inverter reduced-order transformer equivalent in current and voltage-controlled modes. The developed DP models are implemented in MATLAB are then validated against the reduced-order time-domain models of the single-phase inverter developed in Simulink/SimPowerSystems. Simulation studies involving a change in inverter reference current as well as a fault occurrence at the load bus are carried out. The simulation results obtained reveal that the DP models have high fidelity in capturing transient and steady-state conditions while showing superior computational speed compared to the time-domain models. Thus, the DP-based reduced-order single-phase inverter model is a good candidate for large-scale power system simulations and analyses.