Abstract
An increasing number of electric vehicles (EVs) entails an increasing number of installed charging stations in distribution grids. Therefore, a simulation study is set up in an existing German low voltage (LV) grid to classify existing strategies with the aim to prevent the LV grid from congestion. Classification is based on the effectiveness of enhancing the penetration of EVs in the considered LV grid. A battery storage system in two operating modes is compared to a line voltage regulator and a load management which reduces the charging power to 50 % of nominal power. Thereby, voltage unbalance and voltage drop due to charging processes of EVs are addressed. Most effective strategy in the considered LV grid is the load management, which is further analyzed regarding the time spans of application of this strategy. Differences in effectiveness of strategies can be observed for balanced and unbalanced power flow due to EV charging.
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