Distributed maximum power point tracking with overvoltage protection for pv systems

This paper presents an integral solution of the overvoltage problem caused by mismatched conditions when DC-DC converter outputs of PV systems are connected in series, and a distributed maximum power point tracking architecture is implemented. The operating conditions that cause the overvoltage prob...

Full description

Autores:
Ramos Paja, Carlos Andrés
Saavedra Montes, Andrés Julián
Vitelli, Massimo
Tipo de recurso:
Article of journal
Fecha de publicación:
2013
Institución:
Universidad Nacional de Colombia
Repositorio:
Universidad Nacional de Colombia
Idioma:
spa
OAI Identifier:
oai:repositorio.unal.edu.co:unal/41329
Acceso en línea:
https://repositorio.unal.edu.co/handle/unal/41329
http://bdigital.unal.edu.co/31426/
Palabra clave:
photovoltaic systems
DC-DC converters
overvoltage protection
distributed maximum power point tracking
Rights
openAccess
License
Atribución-NoComercial 4.0 Internacional
Description
Summary:This paper presents an integral solution of the overvoltage problem caused by mismatched conditions when DC-DC converter outputs of PV systems are connected in series, and a distributed maximum power point tracking architecture is implemented. The operating conditions that cause the overvoltage problem are discussed in detail and the consequences of the overvoltage problem are illustrated. The proposed solution is based on a structure that includes a non-linear controller, two linear controllers, and a maximum power point tracking algorithm. Such a solution makes it possible to regulate the PV voltage according to the MPPT controller commands and to limit the DC-DC converter output voltage to avoid damages. The non-linear control structure is experimentally validated with a boost converter and a BP585 PV panel. Simulation results show that the proposed integral solution allows the operation of PV panels in the feasible maximum power point and protects the integrity of the DC-DC converters, avoiding the overvoltage problem caused by mismatched conditions.