Improving the Reactive Power Compensation Strategy of UPQC

摘要

This paper describes a reactive power control strategy based on the unified power quality conditioner (UPQC). The shunt unit is mainly used to compensate the reactive power based on the active and reactive power decoupling control. Because the series inverter is usually in the bypass switch state, the power coordinated control strategy is also presented. Using series/shunt unit together to compensate reactive power, we can reduce the capacity of shunt inverter. The simulation proved that the control method not only can compensate the active power on the premise of ensuring the system stability, but also can guarantee the stability of the load voltage.