Observer‐based control of a photovoltaic DC–DC buck converter: HDS approach

Abstract

In this paper, a new observer-based controller is proposed for a photovoltaic DC-DC buck converter; both photovoltaic (PV) voltage and current regulation are considered. In order to deal with the complex and nonlinear PV mathematical model and adapt it to the control purpose, a hybrid PV current observer model is proposed; three modes are defined and the stability of the observer is discussed using the hybrid dynamical system approach (HDS). The observer-based controller is designed for both voltage and current regulation of the PV system; the closed loop of the full system stability is demonstrated through Lyapunov analysis. Experimental results are also presented showing the feasibility of the proposed observer-based controller.

Design and experimental implementation of a new robust observer-based nonlinear controller for DC-DC buck converters

“…In order to ensure the condition Eq. (10); based on Eq. ( 14), the resulting control law (𝑢) is derived as…”

“…The DC microgrids, in particular, are gaining an increased attention from researchers worldwide [5][6][7]. In this perspective, numerous studies are suggested and discussed in the literature of smart grids and power electronics that deal with the control of such systems [8][9][10].…”

Distributed cooperative control for parallel direct current–direct current buck converters based on multi‐agent consensus theory

“…In the literature, there have been some developed control methods for the parallel DC-DC converters, for example, terminal sliding mode control and adaptive control method are introduced in Zhao et al [6] and He et al [7], the master-slave control presented in Mazumder et al [8] and some recent intelligent control in other studies [9][10][11][12][13][14], and observation-based control in Ali et al [15] and Du et al [16]. It should be pointed out that the most of these control algorithms are based on the centralized control.…”