Power Management of Standalone Hybrid PV-Micro Hydro Battery Energy Storage System using Fuzzy Logic Controller

Abstract

Integration of renewable energy sources at distributed level can be good solution for providing reliable electricity to rural areas. Further, the management of these renewable energy systems is very vital. The study area has on average 5.83kwh/m2/d solar radiation and average flow rate of 0.3m3/s. There are generally two types of loads (household and commercial) with total electric demand of 35.653 KW. The proposed management system is implemented with fuzzy logic controller and at the same time to maintain the battery state of charge (SOC) with in allowable limits. The load power response using fuzzy logic controller was compared with conventional proportional integral (PI) controller. The results obtained show that in spite of sudden load changes and variations in the power generation, the power balance between the supply and demand effectively maintained by the developed fuzzy logic based controller (FLC). Various components of hybrid system are modeled and simulated in MATLAB/ Simulink and the parameters are controlled and calibrated by the fuzzy logic toolbox. Keywords: Power management, hybrid energy system, PI controller and fuzzy logic controller.