Design and RTDS Implementation of a TS-Fuzzy Controller for Battery Management in PV Energy System Application

Document Type : Technical Note

Author

DEPARTMENT OF ELECTRICAL ENGINEERING, NIT JAMSHEDPUR, JAMSHEDPUR, INDIA

Abstract

This paper presents a comprehensive design and control strategy for a photovoltaic (PV) energy storage system. The system consists of a 2kW photovoltaic system, two converter circuits, a resistive load of 6ohm and a Lithium-ion battery storage integrated with DC Bus supplying constant power to resistive load. This scheme offered two converter topologies; one is a boost converter and another is a DC / DC bidirectional converter. The boost converter is directly connected in series to the PV array whereas the bidirectional DC/DC converter (BDC) is connected to the battery. The boost converter is used to regulate the maximum power point tracking (MPPT) of the PV array. Closed-loop control of the bidirectional controller is implemented with Takagi-Sugeno Fuzzy (TS-Fuzzy) controller to regulate the battery charging and discharging power flow. The proposed scheme provides a good stabilization in the DC bus voltage. Simulation results of the proposed control schema under MTALAB/Simulink are presented and compared with the Proportional Integral (PI) controller. The simulation results obtained from MATLAB are verified on Real Time Digital Simulator (RTDS).

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