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SUKIČ, P., RODIČ, M., ŠTUMBERGER, G.
ADAPTING CAR CHARGING STATION TO PV PLANT OUTPUT POWER
KOMUNALNA ENERGETIKA / POWER ENGINERING, 31
The increasing number of PV systems increases also their influence on the electricity network in which they are connected. The PV systems operation has often a negative impact on the network voltage profile. Fluctuation of clouds causes a step decrease of a solar irradiation and subsequently leads to drastically changes in PV system’s output power in a very short period of time. In areas with a high concentration of PV systems it is to expect the drop of network voltage or even frequency. Problems related to step changes in output power of PV systems are usually solved by using energy storage devices, which are capable to compensate the output power changes.
Simultaneously with PV systems charging stations for electrical vehicle appeared in electricity networks. The most powerful chargers achieve a power up to 120 kW per installed unit and represent a heavy load in comparison to other loads connected to the network in vicinity. In case of a step reduction in PV system’s output power it is possible to lower the charging of electrical vehicles during the transient behaviour in order reduce the overall impact on the electricity network.
The paper presents simulation of the PV system disturbance compensation with the temporary decrease in charging power of vehicle connected to the charging station. The results presented show that the proposed compensation can improve voltage profile in the electricity network.
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