A Dual-Decoupled-Input Pwm Three-Port Converter With Sliding Mode Control

In this paper, a partially isolated three-port converter (TPC) consisting of an interleaved BUCK/BOOST converter, an uncontrolled rectifier and a high frequency transformer is proposed. The proposed TPC can control two photovoltaic (PI) systems independently through two nonisolated input ports to support the DC loads which is connected with the isolated output port. The pulsewidth modulation (PWM) control is employed to realize the decoupled control of two input ports through two duty cycle D-1 and D-2, respectively To deal with the uncertainty of the PV systems, the sliding mode control (SMC) based on the maximum power point tracking (MPPT) algorithm is employed to maximize the efficiency of the PV panels and realizes the fast and smooth transient response for the irradiance and temperature variation. The simulation platform is built to demonstrate the performance of the proposed converter and the designed controller. Finally, the simulation results verify the validity of the converter with the SMC controller