This paper presents impacts of low voltage PEV single phase charging on electrical distribution network. Simulation model and analysis tools under DigSILENT Power Factory program were used in this research. There are 5 case studies under this analysis, where each case operates at different charging time durations between 16.00 and 24.00. Assessment of the impact of PEV charging is performed based on the PEA standards. The simulation results show that all charging case studies increase line loading in the distribution network over the limit by 80%. The voltage at the upstream point of the feeder slightly dropped while at the downstream point dropped 4 times lower. Average line losses for all case studies increase approximately 13.36% compared to the base case study.
This paper presents performance analysis of future PEA distribution network under high penetration of PEVs home charging. The analysis and impact assessment was evaluated by the voltage unbalance factor (%VUF), according to IEC 61000-2-4: 2000-06 standards. A distribution network was modeled based on the DIgSILENT Power Factory and DIgSILENT Programming Language (DPL). The penetration of PEVs home charging to each node and the number of PEVs to each phase was determined by Monte Carlo method. Charging scenarios was focused on overlaps of charging periods in each stage, and PEVs charging duration is about 6 hours. This paper presents 5 case studies of PEVs single phase home charging. The average points of charge were set as Max-to-Min charge, Min-to-Max charge, Central-offeeder charge, and Random-point charge. Simulation results demonstrate that high penetration of PEVs charging raises the voltage unbalance factor (%VUF), when there are overlapping charging time periods. T h e %VUF rises gradually as the length of feeder increases, maximum at the end of feeder. In addition, many case studies show %VUF exceeding criterion of 2.0% of the IEC standards.
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