Sharing of Unbalanced Loads in an Isolated Distributed Generation System with Droop Controlled Doubly Fed Induction Generator

Abstract:

If a doubly fed induction generator (DFIG) were to penetrate into a distributed generation system successfully, it should be able to adapt to autonomous and unbalanced conditions. To dealing with this situation, an indirect stator flux orientation (ISFO) control strategy with the droop method is introduced to cope with the positive sequence components of DFIG and provide the system with a solid voltage and frequency support. Meanwhile, a negative sequence droop is also proposed for DFIG so as to achieve a reasonable sharing of unbalanced loads and ensure the power supply quality at the point of common coupling (PCC). Finally, simulation results are provided to demonstrate the correctness of the suggested control strategy under autonomous and unbalanced conditions when DFIG is connected in parallel with a converter.

• Periodical: Advanced Materials Research (Volumes 1070-1072)
• Pages: 264-269
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1070-1072.264
• Online since: December 2014
• Authors: Bo Zhou, Heng Nian, Gan Li, Hua Bo Shi
• Keywords: Autonomous, Distributed Generation System, Doubly Fed Induction Generator (DFIG), Droop Control, Negative Sequence, Unbalanced Loads

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