Study on the Strategies to Mitigate the Effects of Partial Shading on PV Power Generation Systems

The main purpose of this paper is to explore various possible strategies to reduce the impacts of partial shading on the output of the PV systems. First, under various typical partial shading scenarios, the topology of various PV modules and the connections of bypass diodes were evaluated to determine the best structure for them. Next, this paper compared different maximum power tracking control strategies, and combined with the reconfiguration strategies. It aims to improve the overall power generation performance in a shading environment. Finally, this paper studied the impact of different voltage converter configurations on the shading effect, and then proposed the optimal voltage converter configuration. These converters include central, single string or micro configurations. Through simulations, a complete strategy for reducing the impact of shading was proposed for solar photovoltaic systems.