A four-wire reduced bus capacitance UPFC for LV distribution networks with high PV penetrations

Haque, M.; Wolfs, Peter

doi:10.1109/AUPEC.2014.6966497

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Authors

Haque, M.

Wolfs, Peter

Date

2014

Type

Conference Paper

Metadata

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Citation

Haque, M. and Wolfs, P. 2014. A four-wire reduced bus capacitance UPFC for LV distribution networks with high PV penetrations.

Source Title

2014 Australasian Universities Power Engineering Conference, AUPEC 2014 - Proceedings

DOI

10.1109/AUPEC.2014.6966497

ISBN

9780646923758

School

Department of Electrical and Computer Engineering

URI

http://hdl.handle.net/20.500.11937/55282

Collection

Curtin Research Publications

Abstract

© 2014 ACPE. In this paper, we propose a low voltage (LV) distribution level four-wire unified power flow controller (UPFC) for voltage regulation and phase current balancing. This device is shown capable of regulating the positive, negative and zero sequence voltage in LV distribution networks under high PV penetrations. At same time, the device is capable of power factor correction, zero sequence or neutral current compensation and a degree of negative sequence current compensation. Instantaneous reactive power theory shows that DC-bus capacitor power will fluctuate at twice mains frequency during any unbalanced operation of the regulator. Real and instantaneous power balance of UPFC can be maintained by allowing the input shunt converter to draw a small positive and negative sequence current respectively. Instantaneous power balance with negative sequence current makes it possible to reduce the DC bus capacitance which allows long life ceramic or polypropylene capacitors to replace electrolytic capacitors.