A Voltage PID Controller Synthesis Based on a New Small-Signal Linear Model to Enhance the Performance of the Standard P &O Algorithm Employed in Photovoltaic Panels

• Published in: Arabian journal for science and engineering (2011) Vol. 48; no. 5; pp. 6615 - 6630
• Main Authors: Aissani, Siham, Kahla, Sami, Bechouat, Mohcene, Amieur, Toufik, Sedraoui, Moussa
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.05.2023; Springer Nature B.V
• Subjects: Algorithms; Controllers; Electric potential; Engineering; Humanities and Social Sciences; Irradiance; Matlab; Maximum power tracking; multidisciplinary; Proportional integral derivative; Research Article-Electrical Engineering; Science; Temperature; Voltage; Voltage converters (DC to DC); Voltage PID controller; Small-signal model; GPV panel; control strategy
• ISSN: 2193-567X; 1319-8025; 2191-4281
• DOI: 10.1007/s13369-022-07494-x

This paper presents a new linear model design including the KC200GT photovoltaic generator GPV panel, DC-DC boost converter, and resistive load. The small-signal principle is indeed applied to the configuration connecting these three devices that are previously developed graphically using the M a t l a b ® / S i m u l i n k software package. This new model design is established through a set of proposed steps, providing the first contribution of this paper. A new voltage proportional-integral-derivative ( PID ) controller is synthesized based on the previous linear small-signal model. The controller parameters are computed by proposing a reference open-loop system and using the frequency identification approach, providing the second contribution of this paper. The resulting PID controller is combined with the classical perturb and observe ( P &O ) algorithm where its fill factor ( FF ) and its reference tracking dynamic are significantly improved. Improving these two performances for a sudden change of both climatic conditions, i.e., absolute temperature and solar irradiance, constitutes another contribution of this paper. Given improving the previous two performances, the maximum power point tracking ( MPPT ) scheme with oscillation free tracking of the desired MPP is established for conventional and improved P &O algorithms using S i m p o w e r ® system libraries of the M a t l a b ® / S i m u l i n k environment. The given simulation tests confirm the effectiveness of the proposed P &O-MPPT control strategy in terms of reference tracking accuracy, rise and settling times, and solving the ripple issue that occurred in the DC-DC boost converter output current.