Universal custom power conditioner (UCPC) with integrated control

Abstract

This paper deals with the integrated control of a Universal Custom Power Conditioner (UCPC) applied to distribution systems. The proposed UCPC comprises a series PWM (pulse width modulation) converter and two shunt PWM converters with a battery energy storage unit for multi-function control. The goal of the UCPC is to utilize stored energy to achieve coordinated compensation functions such as short time uninterruptable power supply (UPS), voltage flicker control, dynamic voltage restorer (DVR), harmonic isolator or filter, power factor correction, system oscillation damping and interphase power controller using one device. It also manages a number of power quality and reliability problems simultaneously. The validity of the proposed UCPC with an integrated control method has been demonstrated through EMTDC/PSCAD simulation.