Experimental Validation and Efficiency Analysis of Sensorless PR based 15PUC (fifteen level Packed U Cell) MLI for Commercial & Residential Applications with Novel Switching Algorithm.

This paper prompt fifteen level packed U cell (PUC) based multilevel-inverter (MLI) topology for standalone and grid-connected applications. The 15PUC required only eight IGBTs compared with other conventional MLIs (FC, NPC, HCHB and CHB). This paper describes and proposes a sensorless proportional resonant (SLPR) controller with radical multicarrier (RMC) based LS PD-PWM and a novel switching algorithm. These proposed controllers compensate for DC-link capacitor voltages, control third, higher and zeroorder harmonics. The stability analysis and robustness of the proposed SLPR controller with the PUC system have been verified through Bode and Nyquist plots. In addition, the 15PUC system is proving highly efficient-based system through power loss analysis. The effectiveness and performance of 15PUC with proposed controllers are evaluated by using experimentally and MATLAB simulations also. The results are verified through FFT analysis and obtained THD% comes under the IEEE-519 standard. [ABSTRACT FROM AUTHOR]