Journal
IET GENERATION TRANSMISSION & DISTRIBUTION
Volume 14, Issue 3, Pages 349-361Publisher
INST ENGINEERING TECHNOLOGY-IET
DOI: 10.1049/iet-gtd.2019.0851
Keywords
photovoltaic power systems; building integrated photovoltaics; reactive power control; power distribution control; load flow; voltage control; low-voltage distribution networks; rooftop photovoltaic system; distribution feeder buses; voltage-violation condition; network unbalance percentage; voltage regulation; distributed rooftop PV systems; distributed generators; voltage-violation mitigation; four-wire LV distribution network; on-load tap changer; demand-side management; active power curtailment; static transfer switch; energy storage systems; MATLAB software environment
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The integration of the various types of distributed generators in low-voltage (LV) distribution networks becomes a great concern, especially the rooftop photovoltaic (PV) systems. The negative impacts of the rooftop PVs on the distribution feeder buses' voltage include voltage rise and voltage unbalance (VU). Such a voltage-violation condition depends mainly on the PVs ratings and the network unbalance percentage. This study presents a review for different techniques used to mitigate the voltage violation resulting from PVs integration in a typical three-phase four-wire LV distribution network case study. The voltage-violation mitigation techniques studied in this study are enhancement of the feeder, on-load tap changer, demand-side management, active power curtailment, a reactive power control, static transfer switch, energy storage systems and hybrid strategies. The LV distribution network case study was modelled based on constant power model method using MATLAB software environment. The simulation results demonstrate both voltage regulation and alleviating VU capabilities of each technique.
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