Multivariable Coordinated Nonlinear Gain Droop Control for PV-Battery Hybrid DC Microgrid Access System via a T-S Fuzzy Decision Approach

The PV-Battery hybrid DC microgrid is an important structural form for distributed renewable energy applications. This paper focuses on improving the access utilization rate of and enhancing stability bus voltage. Firstly, based voltage droop control method multi-source system, relationship between power margin regulation deviation analyzed. Then, a multivariable T-S fuzzy decision approach used to design nonlinear virtual resistance-based gain coefficient function, which achieves highly adaptive coordinated distribution as well supports stabilization. input variables include point, state charge battery, PV sunlight intensity. Finally, simulation system built employing MATLAB/Simulink, feasibility effectiveness proposed strategy are verified through multi-scheme simulations.