Abstract:
Due to the increase of electrical energy demand and economic growth in Thailand, government has been acted accordingly by encouraging the installation of renewable energy. Among many options of renewable energy, solar energy is most popular. Therefore, rooftop PV installation has been highly encouraged and supported. Anyway, the rise of rooftop PV installation has several undesirable effects on distribution systems such as violation of voltage limit and unbalanced voltage, which are capable of sabotaging many devices in the system. This thesis starts from the modeling of rooftop PV for studying the impacts on system voltages. Also, this thesis proposes two approaches for minimizing the impacts of rooftop PV on the system. These are the installation of utilization transformers and the phase balancing of loads. The proposed approaches allow rooftop PV to be effectively manageable, and help reduce undesirable impacts on the distribution systems.