A Renewable Energy based Grid Tied Micro Grid–Islanded Mode operation

SEEE DIGIBOOK ON ENGINEERING & TECHNOLOGY, VOL. 01, FEB 2018 PP.(190-195)
Abstract– Islanding is a condition in which a microgrid or a portion of power grid, consisting of Distributed Generation sources or Renewable Energy Sources (RES), converter, and load, gets disconnected from the utility grid. Under this condition the DG sources in a microgrid must switch to a voltage control mode, in order to provide constant voltage to local loads. In grid connected mode, depending on the power demand in local load with suitable market price and also supplies reactive power to the RES to maintain the power generated. Providing constant voltage at a stable frequency with proper synchronization amongst each Renewable Energy Resources (RES) in a microgrid is a challenge. The complexity of such grid requires careful study and analysis before actual implementation. Thus the paper describes an islanded microgrid with master-slave controller for power balance, voltage/frequency regulation, and synchronization. The effectiveness of the proposed Hysteresis controller is designed in MATLAB; simulation results under balanced/unbalanced nonlinear loads condition were analyzed.
Index Terms – PV System, Wind System, Fuel Cell, grid-connected, Hysteresis Controller, MATLAB/Simulink.
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S.Siva, Dr. Sujatha Balaraman,
Government College of Technology,
Coimbatore, India
siva6192@yahoo.com

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