PV-integration strategies for low voltage networks

Abstract

This paper proposes a method to investigate the potential of Reactive Power Control (RPC) to maximize the utilization of installed PV sources in distribution grids. Different RPC approaches are examined in combination with distributed storage, grid expansions and curtailment. Simulations are carried out on reference distribution grids, representing remote, rural and urban networks. Varying shares of PV penetration and different PV distributions are simulated on a representative irradiance profile. Batteries are optimally dispatched on the basis of load and solar irradiance forecasts using a Model Predictive Control method. Our proposed centralized control scheme determines optimal active and reactive power trajectories that minimize total operation costs and comply with the grid and storage constraints. The simulation results show, that curtailment and storages can represent a viable alternative to grid expansions, when the PV penetration is moderate. The potential of Reactive Power Control is dependent on the PV distribution and the network.