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Design and Implementation of Photovoltaic Power Conditioning System Using a Current Based Maximum Power Point Tracking

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2 Author(s)
Hanju Cha ; Dept. of Electr. Eng., Chungnam Nat. Univ., Daejeon ; Sanghoey Lee

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. Therefore, it shows a robust and fast response under a rapidly changing environmental condition. In addition, digital phase locked loop using an all pass filter is introduced to detect phase of grid voltage as well as peak voltage. Controller 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. 3 kW prototype photovoltaic power conditioning system is built and its experimental results are given to verify the effectiveness of the proposed control schemes.

Published in:

Industry Applications Society Annual Meeting, 2008. IAS '08. IEEE

Date of Conference:

5-9 Oct. 2008