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 100 W parallel module buck converters with a TMS320F2812 DSP has been experimented using a real 200 W solar array to validate the proposed digital control scheme