Photovoltaic Voltage Regulation by Affine Parameterization

Abstract

Photovoltaic power systems work under uncertain, non-linear, and time-variant environments, making the controller design of solar converters a challenging problem. This article proposes an application of the affine parameterization design (APD) to photovoltaic voltage regulation for DC/DC converters. The affine parameterization approach greatly simplifies the control design by directly choosing parameters from desired closed-loop characteristics. The tradeoff between robustness and performance becomes observable thanks to the feature of the APD. The proposed method has been implemented in DSP hardware, and the effectiveness of the APD modeling and design is demonstrated by experimental evaluation.

Keywords:

• Photovoltaic power systems
• Affine parameterization
• Digital control