UNIFIED POWER QUALITY CONDITIONER (UPQC): DEVELOPMENT OF HARDWARE USING FACTS TECHNOLOGY

Abstract

Unified Power Quality Conditioner (UPQC), a relatively new device, can be used simultaneously in voltage or current control mode in power distribution system. But development of hardware with appropriate control circuit is a challenging task. In the voltage control mode, the UPQC can force the voltage of a distribution bus to be balanced sinusoids. At the same time it can also control perform load compensation resulting in the drawing of balanced sinusoidal currents from the distribution system bus in the current control mode. In this paper the hardware of the voltage source converter used for UPQC together with details of microcontroller based control philosophy has been presented.