LESS COMPUTATIONAL BASED MPC CONTROL FOR SEVEN LEVEL CONVERTER FOR PV GRID-TIED APPLICATIONS

Nidhi Mishra and Bhim Singh

Keywords

PUC7, Photovoltaic, PV array, High Power Conversion, LCBMPC, MPC, THD

Abstract

This paper proposes a less computational based model predictive control (LCBMPC) for seven level converter with less number of active switches. Major advantage of the controller is its computational burden is less as compared to the conventional MPC control which requires cost function and weighting factors and also proportional integral (PI) controller. Stepwise the methodology of the proposed controller is explained which helps in getting the modulator to compare to the switching carriers for seven level voltage development. Compared to PI controller also the controller is much better as it generates better modulating signal of high amplitude. Here PV array is connected as a source of the seven level converter named packed U-cell (PUC7). Second source is one-third of the first DC source voltage. Power is fed from DC to grid side and dynamic performance can be seen which has been executed with the proposed MPC controller and total harmonic distortion (THD) for the converter voltage and grid current can be seen which is much better with the use to MPC controller under the limit of IEEE-1547 and IEC-61727 standard.

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