Fuzzy Logic Controller for Voltage and Frequency Stabilization in DC decoupled Micro grid system
Angalaeswari S1, Jamuna K2

1K.Jamuna*, School of Electrical Engineering, Vellore Institute of Technology, Chennai, India.
2S.Angalaeswari, School of Electrical Engineering, Vellore Institute of Technology, Chennai, India.
Manuscript received on July 20, 2019. | Revised Manuscript received on August 10, 2019. | Manuscript published on August 30, 2019. | PP: 3179-3186 | Volume-8 Issue-6, August 2019. | Retrieval Number: F8806088619/2019©BEIESP | DOI: 10.35940/ijeat.F8806.088619
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)

Abstract: An efficient Fuzzy Logic Controller (FLC) is proposed for maintaining constant voltage and frequency in a Decoupled DC micro grid system. The micro grid is modeled with solar, wind turbine, Fuel cell, battery and loads. Individual fuzzy MPPT (Maximum Power Point Tracking) controllers have proposed for solar, wind and fuel cell to extract maximum power from the sources and also to maintain constant voltage at DC bus. For the bidirectional power flow among the buses in the micro grid with power management strategy, an efficient Fuzzy logic controller is proposed for the bidirectional converter connected between DC and AC buses. The performance indices such as ITAE, ITSE, and settling time, rise time of DC link voltage has determined and it is being compared with the conventional Proportional Integral (PI) controller to endorse the performance of the proposed FLC. The results prove that the FLC has better performance in all aspects and it is more suitable for the power management in micro grid.
Keywords: Micro grid, Fuzzy Logic Controller, Power management, Performance Indices, Utility Grid