Development of models for test performance of PV ... - IEEE Xplore
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Development of models for test performance of PV ... - IEEE Xplore
May 11, 2003 - Universidade Federal de Minas Gerais UFMG, 4. ... CEMIG - CP 992 - Belo Horizonte, Brazil, Fax #: 55 31 3299 4054, e-mail: ssacdii~cemie.a ...
3rd World Conference on Photovoltaic Energy Conversion
May 11-18, 2003 Osaka, Japan
7LN-D-I I
DEVELOPMENT OF MODELS FOR TEST PERFORMANCE OF PV MODULES Lauro de V. B. Machado Neto’, Luis G. M. de Oliveira’, Claudia V. T. Cahral’, Delly Oliveira Filho’, Porfirio C. Cortizo’, Antbnia S. A. C. Dink4 1. Politechnical Institute - PUC Minas, 2. Universidade Federal de Viqosa - UFV 3. Universidade Federal de Minas Gerais UFMG, 4. Companhia Energetica de Minas Gerais - CEMIG CEMIG - CP 992 - Belo Horizonte, Brazil, Fax #: 55 31 3299 4054, e-mail: ssacdii~cemie.a,m.br ~
ABSTRACT This paper describes the first results of development of user-friendly tools and models for predicting and evaluating performances of photovoltaic modules under actual field conditions. First is described the development of model for the photovoltaic module that uses the mono and poly-crystaline tecnologies. A workhenck consisting of a micro-controller load simulator and a data acquisition system for the charactertization of photovoltaic modules under specific operational conditions is plesented. The models parameters are then estimated and the simulation is carried out. These tools enable the field engineer to predict system (and component) performance for known operational conditions before actually deploying the system for its intended application.
The developed models are presented next. The model was initially developed for single crystal silicon modules and then polycrystalline silicon.
2.1 MONO-CRYSTALLINE Output Voltage:
Output Current:
PhotoGenerated Current:
1.
For balance of system component projects, such as maximum power point tracker, charge controllers and inverters, it is initially necessary to model the photovoltaic generator. This paper presents the development of solar system component models and a load simulator for evaluating and predicting performances of photovoltaic modules. Satic and dynamic models are used, for which parameters estimation is necessaly from the data collection of a photovoltaic system. To comply with such requirements, a data acquisition system, sensors and a parameter estimation program were developed. The models are validityed, for a real, field-based PV system. The development of a microcontroller-based system for a load simulator, consisting of a boost converter and includes a technique for the current control (pulse width modulation control) is also presented. These tools enable the field engineer to predict system (and component) performance for known operational conditions before actually deploying the system for its intended application. 2.
