Managing the distributed generation units in a microgrid using a fuzzy-PI controller

A power distribution system with distributed generations can operate as a microgrid under specific conditions. A microgrid can be operated under grid-connected and islanded modes seamlessly without disrupting the loads within the microgrid. This study analyzes the intelligent control of a microgrid with a pulse-width modulation-controlled voltage source inverter. Switching patterns are generated through a fuzzy proportional-integral (PI) controller. This study aims to develop a fuzzy-PI controller and compare its performance with that of a PI controller in controlling the voltage and frequency of a microgrid under disturbances in a Matlab/Simulink environment. Results show that the fuzzy-PI controller has higher capability, precision, and robustness than the PI controller in quickly restoring and stabilizing the microgrid. A simulation experiment is also performed to verify the greater validity and effectiveness of the microgrid equipped with the fuzzy-PI controller than with the PI controller. The developed fuzzy-PI controller can reduce the total harmonic distortion by 0.46%. Streszczenie. W artykule analizowano inteligentne sterowanie mikrosieci z wykorzystaniem przekszta tnika sterowanego metod modulacji szeroko ci impulsu. Jako sterownik wykorzystano proporcjonalno ca kuj cy uk ad z logika rozmyt . Zbadano prac uk adu w sieci z zak óceniami. Stwierdzon znacz ce przewagi kontrolera pracuj cego z logika rozmyt w porównaniu do uk adów konwencjonalnvch. Zarz dzanie rozproszonymi generatorami w mikrocieci z wykorzystaniem sterowników o logice rozmytej