Abstract:
One of the most popular technologies of renewable energy generation in Thailand is photovoltaic generation system which is encouraged by Thailand government and keeps increasing continuously. However, the control and management of photovoltaic generation system by the existing utility grid codes cannot maximize the capability of inverter, in photovoltaic generation system, for controlling the reactive power and voltage. Therefore, system voltages may be out of the acceptable range of utility grid codes occasionally. This thesis starts at the modeling of photovoltaic generation system for studying the impacts on system voltages. Also, this thesis proposes an idea for controlling the output power of photovoltaic generation system with the consideration of system voltages. The proposed idea allows the photovoltaic generation system to help regulate system voltages, and consequently increases the worth of photovoltaic generation system significantly. Finally, this thesis proposes an electricity billing process that categorizes the billing into various cases where the fairness for both photovoltaic generation system and utility is taken into account.