Digital control of PV systems: Dynamic-gain MPPT algorithm and effects of resolution

Author

Blumenfeld, Alon ; Peretz, Mor Mordechai

Author_Institution

Dept. of Electr. & Comput. Eng., Ben-Gurion Univ. of the Negev, Beer-Sheva, Israel

fYear

2014

fDate

22-25 June 2014

Firstpage

1

Lastpage

7

Abstract

This paper introduces a dynamic-gain MPPT algorithm for PV systems. The method demonstrates a rapid and uniform convergence toward the MPP by employing dynamic steps while owning MPPT control compatibility even for differential power processors. A theoretical analysis on the effects of resolution on limit cycle oscillations existence and power curve traps in the MPPT process is provided. The dynamic gain MPPT algorithm is demonstrated by simulation and experiments, avoiding limit cycle oscillations and power curve traps. The presented algorithm is verified on bi-directional differential power processors, demonstrating dynamic MPP convergence with no limit cycle oscillations and significant improvement of power harvesting capability up to 42%.

Keywords

convergence; digital control; energy harvesting; maximum power point trackers; photovoltaic power systems; power generation control; MPPT control compatibility; PV system; differential power processor; digital control; dynamic MPP convergence; dynamic gain MPPT algorithm; power harvesting capability improvement; Algorithm design and analysis; Convergence; Heuristic algorithms; Limit-cycles; Oscillators; Power electronics; Signal resolution;

fLanguage

English

Publisher

ieee

Conference_Titel

Control and Modeling for Power Electronics (COMPEL), 2014 IEEE 15th Workshop on

Conference_Location

Santander

Type

conf

DOI

10.1109/COMPEL.2014.6877135

Filename

6877135