Reactive Power Incentive in Distribution Network with High Penetration of PV System

High penetration of photovoltaic (PV) system in distribution network can cause overvoltage during noon. In addition, undervoltage can also occur at night. One way to overcome this phenomenon is by using reactive power management of inverter in PV system. However, the presence of reactive power may lead to an increase in the internal loss of inverter and active power curtailment. Reactive power incentive is proposed to compensate for this phenomenon. This study discusses about the minimum reactive power incentive to overcome overvoltage and undervoltage. Genetic Algorithm is used to perform the optimization. IEEE 33 Bus with several PV systems in it is used to validate the proposed method. Result shows that overvoltage and undervoltage can be overcome by adding $41.44 as reactive power incentive to the PV system every day.