MODEL PREDICTIVE CONTROL FOR 3-LEVEL T-TYPE INVERTER GRID CONNECTED FOR SOLAR SYSTEM
DOI:
https://doi.org/10.62985/j.huit_ojs.vol26.no3.441Keywords:
3-level T-NPC, capacitor voltage balancing, model predictive control, P&O algorithmAbstract
This article presents model predictive control technique for a grid-connected 3-phase 3-level T-type inverter for solar system. First, the DC-DC conversion stage using the maximum power point tracing technique is presented. Next, model predictive control method with the goal of current tracking and balancing the capacitor voltages is introduced. In this control strategy, the reference current is taken from the active current and reactive current through the transformation from dq to αβ coordinate. The effectiveness of the control method is demonstrated through simulations on Matlab/ Simulink software. The power transmitted to the grid is maintained stable corresponding to the maximum power point of the PV array, with power factor at 1 under different heat radiation conditions. The grid current response quickly reaches the reference value. The voltage of the capacitors is maintained in a well-balanced.
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