Description

The main objective of this project is to design of control circuit with the zero sequence components but the proposed system will enhance the power control ability in the adverse condition. The power converter is implemented with the new control technique. In the current component zero sequence components is controlled to reduce the unbalanced nature of ac source. This power converter have the ability for the flexible control target, produces the better output power and load current during unbalanced ac source. This project will have more accurate result then the existing system. Three-phase dc–ac power converters suffer from power oscillation and over current problems in case of the unbalanced ac source voltage that can be caused by grid/generator faults. Existing solutions to handle these problems are properly selecting and controlling the positive and negative-sequence currents. In this proposed implementation is, a new series of control strategies which utilize the zero sequence components are proposed to enhance the power control ability under this adverse condition. It is concluded that by introducing proper zero-sequence current controls and corresponding circuit configurations, the power converter can enable more flexible control targets, achieving better performances in the delivered power and the load current when suffering from the unbalanced ac voltage.