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This paper has investigated the optimal localization of photovoltaic systems as one of the distributed generations in micro-grids, with regard to active and reactive power. Micro-grids provide the power quality in accordance with customers' needs, positive effects of micro-grids on the electricity market and economic savings. On the other hand, their effects on reducing air pollution have caused many researchers and experts to notice the issue of micro-grids. So, considering the ability of active and reactive power generation for photovoltaic systems in 24 hours, they can be used more efficiently. The algorithms presented on 33 bus micro-grid are applied in MATLAB, and the results have been investigated. The results have shown that the generated reactive power would significantly reduce the active power of system losses. At 9 AM, considering the PV inverter capability for generating the active and reactive power, voltage profile of the system has improved more effectively. At 12 PM, there are existed the maximum radiation and active power generated, and the whole capacity of the inverter is used to generate the active power. The PV reactive power generated has led to the improvement of the voltage profile.

OPTIMAL LOCATION OF A PHOTOVOLTAIC SYSTEM TO IMPROVE THE VOLTAGE PROFILE CONSIDERING THE ACTIVE AND REACTIVE POWER LIMITATIONS