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Contribution to the Decentralized Energy Management of Autonomous AC-Microgrid

Abstract : This thesis deals with islanded AC microgrid that allows any integration of Distributed Energy Resources (DERs) that may provide their existing supply energy in a controlled manner to insure overall system functioning. The interconnection of a DER to a microgrid is done usually by using a Distributed Interface Converter (DIC), a general power electronics interface block, which consists of a source input converter module, a Voltage Source Inverter module (VSI), an output interface module, and the controller module. The thesis realizes several control laws based on decentralized methods. The major focus is on the Droop functions that are responsible for providing a power distribution balance between different Energy Resources connected to a microgrid. The aim is to insure system stability and better dynamic performance when sharing the power between different DGs as function to their nominal power. Developing a closed loop stability analysis is useful for studying system dynamics in order to obtain a desired transient response that allows identifying the proper loop control parameters. Power Quality enhancement in microgrids is also a purpose of this research. The reduction of harmonic distortions of the output voltage when supplying linear and non-linear loads are taken in consideration in this thesis. Further aspects will be studied about how to deal with constant power loads connected to the grid and the large perturbations exerted. This results to further research studies that deal with large-signal stability of microgrids
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Submitted on : Tuesday, April 24, 2018 - 2:11:05 PM
Last modification on : Friday, August 24, 2018 - 6:36:43 PM
Long-term archiving on: : Wednesday, September 19, 2018 - 7:42:56 AM


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  • HAL Id : tel-01775211, version 1



Hassan Moussa. Contribution to the Decentralized Energy Management of Autonomous AC-Microgrid. Electric power. Université de Lorraine, 2017. English. ⟨NNT : 2017LORR0161⟩. ⟨tel-01775211⟩



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