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Modelling and control of a 100kW photovoltaic inverter with an LCL grid filter for distributed power systems

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4 Author(s)
E. Figueres ; Departamento de Ingeniería Electrónica Camino de Vera S/N Valencia, Spain ; G. Garcera ; J. Sandia ; F. J. Gonzalez-Espin

The aim of this paper is to analyze the control loops stability of three-phase photovoltaic inverters for distributed power generation. The main issues regarding the design of the control stage are outlined, including a small signal model of the photovoltaic cells for control purposes and the influence of high order grid filters on the system stability. Experimental results carried out on a 100 kW inverter are presented to validate the analytical results. The experimental inverter generates a balanced set of currents with a distortion lower than 3%.

Published in:

Power Electronics and Applications, 2007 European Conference on

Date of Conference:

2-5 Sept. 2007