Abstract
The intermittent nature of renewable energy sources, voltage variation and voltage fluctuation can be noticed when large amount of renewable energy (RE) sources are connected on the distribution network, this is even worst during low load condition. Energy storage system is a possible solution, particularly on solving power quality issues caused by large penetration of grid-connected renewable energy sources. However, improper placement of the energy storage system can lead to unsatisfactory mitigation of power quality issues. In addition, poor sizing of the system can cause the energy storage system to be very costly. In this study, a typical Malaysian Medium Voltage (MV) distribution network is modeled using Digsilent PowerFactory to perform an investigation on the voltage impacts of various allocation of energy storage system and photovoltaic systems along the distribution feeder. It is noticed that the voltage impact is significant for high penetration of PV system power output at the feeder end as compared to the same capacity connected at feeder front. The investigation also shows that energy storage systems connected along the location on feeder end can regulate the feeder voltages.
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