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A UPFC with reduced DC bus capacitance for LV distribution networks with high PV penetrations
conference contributionposted on 2017-12-06, 00:00 authored by Peter WolfsPeter Wolfs
A low voltage (LV) distribution level unified power flow controller (UPFC) is shown capable of regulating the positive sequence voltage with a network while simultaneously correcting phase unbalance voltages that can be produced by high levels of distributed photovoltaic (PV) generation. Instantaneous reactive power theory shows that DC-bus capacitor power will fluctuate at twice mains frequency during any unbalanced operation. Instantaneous power balance can be maintained by allowing the input converter to draw a small negative sequence current. This allows a hundred-fold reductionin the value of the DC bus capacitance allowing long life ceramic or polypropylene capacitors to replace electrolytic capacitors in this application.
Parent Title22nd Australasian Universities Power Engineering Conference (AUPEC).
Number of Pages7
Place of PublicationPiscataway, NJ
External Author AffiliationsCurtin University;