Distributed voltage control for distribution feeder with photovoltaic systems

摘要

The voltage fluctuations in an active distribution system is a challenging problem which requires an effective solution to empower the expansion of photovoltaics (PV). In this study, distributed voltage control which leverages the smart inverter technology, is proposed as a solution. In distributed voltage control, the reactive power reference for the PV plants are generated using the weighted voltage deviation of selected nodes. The control method is illustrated on a modified IEEE 34 test feeder integrated with two PV plants. The voltage profile of the IEEE 34 feeder with particle swarm optimization based tuned weights and equal weights are compared. Typical results show that the mean squared error for the proposed tuning method is lower with optimized distributed voltage control.