Control Simulation and Experimental Verification of Maximum Power Point Tracking Based on RT-LAB

The maximum power point tracking (MPPT) control in a Photovoltaic system is the key control technology, however present controllers have the disadvantages of long development cycle, high cost and complex verification, and there are some disadvantages carrying out totally physical simulation or totally digital simulation of different control algorithms. This paper carried out design of hardware controller by researching different kinds of MPPT algorithms together with the improved MPPT algorithm, then digital-analog hybrid real-time simulation was carried out based on the digital main circuit using RT-LAB developed by Opal-RT company. Effectiveness and superiority of the improved MPPT algorithm were verified in comparison with control effects of the improved MPPT algorithm and control effects of traditional MPPT algorithms.