Modeling and simulation for PV, Fuel cell Based MICROGRID under Unbalanced Loading Conditions
Journal Title: International Journal of Modern Engineering Research (IJMER) - Year 2014, Vol 4, Issue 6
Abstract
Distributed generation has attracted great attention in recent years, thanks to the progress in new-generation technologies and advanced power electronics. The Microgrid has been a successful example by integrating various generation sources with the existing power distribution network through power electronic converters. This paper proposes a PV, Fuel cell based microgrid and a new control strategy for the islanded operation of a multi-bus medium voltage (MV) microgrid. The proposed control strategy of each DG comprises a proportional resonance (PR) controller with an adjustable resonance frequency, a droop control strategy, and a negative-sequence impedance controller (NSIC). The PR and droop controllers are, respectively, used to regulate the load voltage and share the average power components among the DG units. The NSIC is used to effectively compensate the negative-sequence currents of the unbalanced loads and to improve the performance of the overall microgrid system. Moreover, the NSIC minimizes the negative-sequence currents in the MV lines and thus, improving the power quality of the microgrid. The performance of the proposed control strategy is verified with PV, Fuel cell inputs by using digital time-domain simulation studies in the MATLAB/SIMULINK software environment
Authors and Affiliations
T. Venugopal , B. Bhavsingh , D. Vani
Keywords
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