Vigneysh Thangavel and Kumarappan Narayanan
Adaptive fuzzy PI controller, microgrid, photovoltaic system, solidoxide fuel cell, DSTATCOM
In this paper, an adaptive fuzzy proportional–integral (AFPI) controller is proposed to improve the dynamic performance of a microgrid power quality (PQ) conditioner. The voltage source converters (VSCs) associated with the distributed generation (DG) units and a distribution static compensator (DSTATCOM) together form an effective microgrid PQ conditioner. The dc-link voltage of the DSTATCOM is controlled using the proposed AFPI controller to improve the dynamic performance of the system during system uncertainties. Unlike the conventional PI controller, in the proposed controller the gains are no longer fixed. It is dynamically adjusted by the fuzzy logic-based intelligent supervisory control system according to system operating conditions. Thus, the intelligent supervisory control system forces the controller to work in a linear region for a wide range of operating conditions and improves the dynamic performance. Simultaneously, the microgrid PQ conditioner effectively compensates the current-based PQ problems and keeps the grid current balanced and sinusoidal with low total harmonic distortion under all conditions.
Important Links:
Go Back
