Abstract
This article presents a new method for reactive power compensation and load balancing in a four-wire, three-phase distribution system. An IGBT-based PWM voltage source inverter with a dc bus capacitor is used as a compensator. The hysteresis-based carrierless PWM current control is employed to derive switching signals to the devices of the compensator. A detailed dynamic model of the complete scheme is developed to study the steady-state and transient behaviour of the proposed compensator. Simulated results for the cases of single-phase, two-phase and three-phase lagging power-factor loads are presented and discussed in detail to demonstrate the reactive power compensation and load balancing capabilities of the compensator.
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