Universal Power Quality Conditioner (UnPQC) for Enhancing the Power Quality in Distribution System

K VENKATRAMAN, Kiran Kumar N, Moorthi S, Selvan M.P.

Abstract


This paper proposes a novel custom power device (CPD), called a Universal Power Quality Conditioner (UnPQC), which
enhanced the quality of power in a distribution system. UnPQC consists of shunt and series compensators without a common
DC link. The series compensator of the presented system, also known as Transformerless Dynamic Voltage Restorer (TDVR),
eliminates power quality problems related to voltage without utilizing any injecting transformer. The shunt compensator of the
proposed system consists of an improved DSTATCOM (Distribution Static Compensator) topology, which mitigates the current
harmonics originating from the nonlinear loads with a reduced DC link voltage. UnPQC is more suitable for applications where
weight and size of the CPDs are critical factors. A simulation was carried out to verify and validate the performance of the
UnPQC and the results demonstrate superior performance in minimizing voltage and current related power quality problems.


Keywords


iDSTATCOM, Power Quality, TDVR, UPQC, UnPQC

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