REACTIVE POWER COMPENSATION AND LOAD BALANCING IN ELECTRIC-POWER DISTRIBUTION-SYSTEMS

This article presents a new method far reactive power compensation and load balancing in a four-wire, three-phase distribution system. An IG BT-based PWM voltage source inverter with a de bus capacitor is used a s a compensator. The hysteresis-based carrierless PWM current control is employed to derive switching signals to the devices of the compensa tor. A detailed dynamic model of the complete scheme is developed to s tudy the steady-state and transient behaviour of the proposed compensa tor Simulated results for the cases of single-phase, two-phase and thr ee-phase lagging power-factor loads are presented and discussed in det ail to demonstrate the reactive power compensation and load balancing capabilities of the compensator. (C) 1998 Elsevier Science Ltd. All ri ghts reserved.