DSTATCOM Inverse System PI Controller

Abstract

DSTATCOM used the direct current control method to suppress the voltage flickering which is caused by the undulatory property load, its reactive current tracking performance plays a decisive role for the inhibitory effect of the device.Considered the parameter installation difficulty and electrical network parameter dynamic change characteristic for conventional PI control when designs the controller, fuzzy logic was proposed that used to make the online adjustment for PI controller's parameter, which makes DSTATCOM has strong auto-adapted and robustness character. When the electrical network parameter changed, DSTATCOM still can suppress the voltage flickering very well. The digital simulation result has confirmed the control policy accuracy and validity.