A novel back to back topology with asymmetric nine switch converters for hybrid power systems using volatile power perceptive technique

The focus of this research is the performance analysis of Doubly Fed Induction Generators (DFIG) systems. The grid connected wind power utilization is increase day by day in worldwide, but some problems are rise when the wind power is given to the grid. The main problem of the grid connected DFIG is power quality issue it should affect the system stability. Many converters are used to enhance the system stability but the output power quality is power and less efficiency. So the proposed Volatile Power Perceptive Technique (VPPT)is implemented to enhance the grid connected DFIG system stability and reduce power quality issues. When connected the wind power to the grid system the voltage sag and swell is occur corresponds to the wind flow of generator, at the time grid system meet the voltage variation under the unbalanced voltage condition, so the power quality is affected. In this proposed VPPT strategy is give the reactive power to the supply line and compensate the unbalanced grid voltage. The two converters rotor side and grid side is used to produce the reactive power with respect to the proposed Volatile Power Perceptive Technique (VPPT) controller, it should give the control signal of converter when the grid meet the unbalanced voltage condition. This proposed technique is improve the power quality of grid connected DFIG system, also it give better efficiency and loss less operation.