| Abstract |
Main issues with the implementation of multilevel converters in high-power applications are high powerquality and minimum switching frequency. A combination of NPC and CHB with new schemes isproposed to find the middle ground in medium voltage applications. NPC is modulated with SHE toprovide active power and eliminate selected harmonics. On the other hand, CHB with floating capacitoris utilized as reactive power compensator. Floating capacitor eliminates the need for real DC source,hence, the volume of the auxiliary circuit can be smaller and less costly. MPC is deployed for CHB,which can compensate the higher order harmonics left by the main stage, stabilize the capacitor voltageand provide better dynamic response simultaneously. Experimental results validate the effectiveness ofthe proposed topology. |
