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A Vector Control Strategy Of Grid Side Converter For Decoupled Control Of Active And Reactive Power

Swagat Pati , Sumit Sen Behera , Tapan Kumar Pattanaik

To increase the cost effectiveness of generation the amount of power factor should be kept as high as possible. For this to happen the value of reactive power has to be as low as possible. For low power factor loads or low power factor generation systems a back to back bidirectional converter set is employed for the purpose of power factor improvement. Voltage oriented vector control is used for the control of grid-side inverter of a back to back bidirectional converter set for this very purpose. Vector control scheme decouples both the active and reactive power for easy control. This scheme maintains the dc-link voltage at a constant value. This system also finds use in grid interfacing of renewable energy generation systems like Wind energy generation system and solar energy generation system. Vector control scheme for grid-side using P-I controllers is modeled in Matlab and the results are analyzed.