Stability analysis of photovoltaic systems driven by advanced MPPT controllers

Author

Krommydas, Konstantinos F. ; Alexandridis, Antonio T.

Author_Institution

Electr. & Comput. Eng. Dept., Univ. of Patras, Rion, Greece

fYear

2013

fDate

25-28 June 2013

Firstpage

1298

Lastpage

1303

Abstract

An advanced maximum power point tracking (MPPT) control method, namely the ripple correlation control (RCC) MPPT method, is applied on a dc/dc boost converter used to interface a photovoltaic (PV) system with the electrical grid. An extensive nonlinear stability analysis is conducted in which the nonlinear model of both the PV source and the dc/dc boost converter dynamics are taken into account. Using this accurate nonlinear model and exploiting the singular perturbation theory and Lyapunov techniques, it is proven in the paper that for appropriate gain values of the RCC-MPPT controller, asymptotic stability to the desired equilibrium is guaranteed. The RCC-MPPT controller performance is finally evaluated by simulating an extreme case of rapid irradiance changes on a complete PV system.

Keywords

Lyapunov methods; maximum power point trackers; perturbation theory; photovoltaic power systems; power grids; power system stability; Lyapunov techniques; MPPT control; RCC; asymptotic stability; dc-dc boost converter; electrical grid; maximum power point tracking control; nonlinear stability analysis; photovoltaic systems; ripple correlation control; singular perturbation theory; Asymptotic stability; Control systems; Mathematical model; Maximum power point trackers; Nonlinear dynamical systems; Stability analysis; Steady-state; MPPT controller design; PV System control; nonlinear stability analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Control & Automation (MED), 2013 21st Mediterranean Conference on

Conference_Location

Chania

Print_ISBN

978-1-4799-0995-7

Type

conf

DOI

10.1109/MED.2013.6608887

Filename

6608887