| Abstract |
The paper presents an extended structure of a neutral point clamped three level inverter, which is able to operate in the shunt active power filter application. The extension allows compensation of active power pulses, caused by specific loads, using capacitor energy storage. The bi-directional DC/DC converter, connected to a DC-link of a three level inverter, offers the possibility of energy exchange and, with the appropriate control strategy, has the ability to keep the neutral point potential at the required level. The proposed structure, particularly the additional DC/DC converter, is described. Finally, simulation and experimental results are given as an illustration of the proposed solution. |
