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Fuzzy-PI Control of Bidirectional DC-DC Converter for 250KW Distributed Solar-Solar Off-Grid System

Syed Umaid Ali, Muhammad Aamir, Faheem Haroon, Mudasir Wahab1, and Muhammad Aqil Zia2
1.Bahria University, Shangrilla Road, Islamabad and 44230, Pakistan
2.Radio Pakistan, G-5 Islamabad and 44000, Pakistan
Abstract—Distributed generation (DG) is one of the main features of micro grid being achieved by different renewable energy sources (RES’s). RES’s are the vital part of Micro grids but due to their intermittent nature, their power output is not reliable and stable. RES such as solar panels connected to DC micro grid have to be connected alongside some ESS such as batteries, fuel cells etc to ensure reliable output. Bidirectional DC-DC converters have been used to provide required power output from DC micro grid to AC micro grid either from battery and solar panels. Control of Bidirectional DC-DC converter ensures reliable output from both battery and solar panels. This paper specifically discuss the design and control of Fuzzy-PI control for bidirectional DC-DC converter. Fuzzy-PI control using State of Charge (SOC) have been implemented in Matlab/Simulink for 250KW load. Results show that bidirectional DC-DC converter improves the reliability of DC power output as well as controlling the charge and discharge of battery.

Index Terms—micro grid, AC micro grid, DC micro grid, bidirectional DC-DC converter, fuzzy, PI

Cite:Syed Umaid Ali, Muhammad Aamir, Faheem Haroon, Mudasir Wahab, and Muhammad Aqil Zia, "Fuzzy-PI Control of Bidirectional DC-DC Converter for 250KW Distributed Solar-Solar Off-Grid System," International Journal of Electrical Energy, Vol. 7, No. 1, pp. 26-30, June 2019. doi: 10.18178/ijoee.7.1.26-29

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