Through the analysis of the three-phase T-type three-level converter and the feedforward decoupling control strategy, a mathematical model in the d-q coordinate system is established. In order to realize the independent control of active and reactive power, a double closed-loop control strategy of current inner loop and voltage outer loop is designed, and the reactive power compensation function is realized on the basis of changing the reactive power component. Finally, the correctness and rationality of the current loop and voltage loop controller parameter design are verified through PLECS simulation.

three-phase T-type; three-level; reactive power; a double closed-loop