Digital Control of the Parallel Interleaved Solar Array Regulator Using the Digital Signal Processor

In this paper, a digital control approach for the parallel interleaved solar array regulator (SAR) is proposed. The proposed control scheme achieves stable operation in the entire region of the solar array (SA). Additionally, by making the effective load characteristic of the SAR seen by the SA as a resistive load sink, the current sharing among the converter modules is possible. Also, this method can be applied to conventional parallel buck and boost converters. The small signal analysis with the digital sampling effect is performed. A SAR system that consists of two 100W parallel module buck converters with a TMS320F2812 DSP has been experimented using a real 200W solar array to validate the proposed digital control scheme.

[1]  Kasemsan Siri,et al.  Study of system instability in solar-array-based power systems , 2000, IEEE Trans. Aerosp. Electron. Syst..

[2]  C. Q. Lee,et al.  Peak power tracking in parallel connected converters , 1992, [Proceedings] 1992 IEEE International Conference on Systems, Man, and Cybernetics.

[3]  K. Siri.  Study of system instability in current-mode converter power systems operating in solar array voltage regulation mode , 2000, APEC 2000. Fifteenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.00CH37058).

[4]  Bo-Hyung Cho,et al.  Large Signal Stability Analysis of the Solar Array Power System Using the Controlled Load Characteristic , 2006 .

[5]  Fred C. Lee,et al.  Large-signal stability analysis of spacecraft power processing systems , 1990 .

[6]  B.H. Cho,et al.  Constant resistance control of solar array regulator using average current mode control , 2006, Twenty-First Annual IEEE Applied Power Electronics Conference and Exposition, 2006. APEC '06..

[7]  Bo H. Cho,et al.  Large-signal analysis of spacecraft power systems , 1989, Proceedings of the 24th Intersociety Energy Conversion Engineering Conference.

[8]  K. Siri,et al.  Parallel-connected converters with maximum power tracking , 2002, APEC. Seventeenth Annual IEEE Applied Power Electronics Conference and Exposition (Cat. No.02CH37335).

[9]  Phuong Huynh.  Analysis and design of microprocessor-controlled peak-power-tracking system , 1992 .

[10]  Chihchiang Hua,et al.  Comparative study of peak power tracking techniques for solar storage system , 1998, APEC '98 Thirteenth Annual Applied Power Electronics Conference and Exposition.

[11]  P. T. Huynh,et al.  Design and analysis of a regulated peak-power tracking system , 1999 .

[12]  C. Q. Lee,et al.  Maximum Power Trackin g in Parallel Connected Converters , 1993 .

[13]  Bo-Hyung Cho,et al.  Analysis and Design of the Inductor-Current-Sensing Peak-Power-Tracking Solar-Array Regulator , 2001 .