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Design and implementation of 3 kW Photovoltaic Power Conditioning System using a Current based Maximum Power Point Tracking  

Cha, Han-Ju (충남대 전기공학과)
Lee, Sang-Hoey (충남대 전기공학과)
Kim, Jae-Eon (충북대 전기전자컴퓨터공학부)
Publication Information
The Transactions of The Korean Institute of Electrical Engineers / v.57, no.10, 2008 , pp. 1796-1801 More about this Journal
Abstract
In this paper, a new current based maximum power point tracking (CMPPT) method is proposed for a single phase photovoltaic power conditioning system and the current based MPPT modifies incremental conductance method. The current based MPPT method makes the entire control structure of the power conditioning system simple and uses an inherent current source characteristic of solar cell array. In addition, digital phase locked loop using an all pass filter is introduced to detect phase of grid voltage as well as peak voltage. Controllers about dc/dc boost converter, dc-link voltage, dc/ac inverter is designed for a coordinated operation. Furthermore, PI current control using a pseudo synchronous d-q transformation is employed for grid current control with unity power factor. 3kW prototype photovoltaic power conditioning system is built and its experimental results are given to verify the effectiveness of the proposed control schemes.
Keywords
Current based maximum power point tracking; Photovoltaic power conditioning system; d-q transformation; Digital phase locked loop; All-pass filter;
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