Control Strategy to Enhance Power Capability of Power Conditioning Unit During FRT

摘要

A control strategy that enhances power capability of power conditioning (PCU) by injecting maximum rated current during fault ride through (FRT) is presented in this paper. To attain proposed strategy, two active power production situations like high and low are considered. In first situation, if source supply is not able to supply complete generated power to grid, controller applies active power curtailment ensuring maximum rated current isn't surpassed. If peak value of permissible current is not attained then, control scheme determines reactive power injected to a desired value; in next situation. A current injection technique to achieve a contrast amongst positive and negative current to limit output current of PCU to its peak rated value and obviates active power oscillations. A simulation carried out to verify proposed method suggested.