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Independent MPP Tracking Method of Hybrid Solar-Wind Power Conditioning Systems Using Integrated Dual-Input Single-PWM-Cell Converter Topology

  • Thenathayalan, Daniel (Dept. of Electrical Engineering, Soongsil University) ;
  • Ahmed, Ashraf (Dept. of Electrical Engineering, Soongsil University) ;
  • Choi, Byung-Min (Dept. of Electrical Engineering, Soongsil University) ;
  • Park, Jeong-Hyun (Dept. of Electrical Engineering, Soongsil University) ;
  • Park, Joung-Hu (Dept. of Electrical Engineering, Soongsil University)
  • Received : 2016.07.06
  • Accepted : 2016.12.12
  • Published : 2017.03.01

Abstract

This paper proposes the modeling and control strategy to track the MPPs of hybrid PV and Wind power systems, using a new dual input boost converter. The dual input power conditioning system with an independent MPPT control scheme is introduced with minimum number of circuit elements in order to reduce the switching loss, size and cost of the system. Since the operating conditions for the PV and Wind power systems are very distinct from each other, an efficient and superior control system is required to track the MPPs of both renewable sources with the use of a simply-structured single-ended single-inductor converter. The design of Power-Conditioning System (PCS) and detail control strategy are presented in this paper. To provide independent tracking of MPPs, a variable duty-cycle control strategy is employed for the wind system and a variable frequency strategy is employed for the PV system. Finally, the proposed dual-input converter for hybrid power conditioning system is implemented and the hardware test results are presented. From the hardware experiment, it is concluded that the proposed system successfully tracks the MPPs of both of the renewable power systems independently.

Keywords

Hybrid renewable power systems;Wind system;PV systems;MPPT

Acknowledgement

Supported by : Korea Institute of Energy Technology Evaluation and Planning (KETEP)

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