Investigation Analysis of Dual Loop Controller for Grid Integrated Solar Photovoltaic Generation Systems

摘要

This research work focuses on the development of an effective constrained delay compensated model predictive current control system for grid-connected solar photo-voltaics. An analytical comparison between the sole stage and double stage grid integrated SPVG is illustrated from which it can be concluded that the double stage topology is a more resounding topology for small and medium power SPVG systems. The control system structure for grid-tied SPVG system is discussed in details. The fuzzy logic based perturb and observe MPPT controller extracts the all-out power from the solar array and the proposed current control systems mitigate the current harmonics. During transient state, the controller executes very fast dynamics. The performance of the control strategy is authenticated by developing a hardware prototype in the laboratory using DS1104.