CONTROL OF THE MAXIMUM POWER POINT OF A SOLAR PANEL, USING SERVO SYSTEM CONTROLLER WITH INTEGRATOR AND PI CONTROLLER DESIGNED BY THE ROOTS LOCUS METHOD

Luis Eduardo Garcia-Jaimes; Diego Alejandro Herrera-Jaramillo; Maribel Arroyave-Giraldo; Habib Elam-Escudero

doi:10.33571/rpolitec.v20n39a13

Authors

Luis Eduardo Garcia-Jaimes Magister en Educación, Especialista en Automatización Industrial, docente investigador Politécnico Colombiano Jaime Izasa Cadavid https://orcid.org/0000-0001-6255-3469
Diego Alejandro Herrera-Jaramillo Magister en Automatización y control industrial, Coordinador de investigación, Institución Universitaria de Envigado https://orcid.org/0000-0002-3914-0794
Maribel Arroyave-Giraldo Magister en Automatización y control industrial, docente investigadora, Institución Universitaria de Envigado https://orcid.org/0000-0001-9654-0543
Habib Elam-Escudero Ingeniería Electrónico en formación, Institución Universitaria de Envigado

DOI:

https://doi.org/10.33571/rpolitec.v20n39a13

Keywords:

PV system model, Buck converter control, RLM control, Servo-type control

Abstract

Photovoltaic system applications require to use a solar panel, a power converter, and a load. When voltage reduction from a panel to a battery is necessary, a buck converter is usually proposed. In the specialized literature, there are a wide variety of controllers oriented to commercial panels; However, even though measuring the energy extraction of a solar panel is the main indicator, there are other metrics such as switching effort that also affect the overall performance of the PV system. The main contribution of this work is the design of two digital controllers for photovoltaic energy extraction: a servo system controller with integrator and a PI controller based on root locus techniques considering an MPPT algorithm and system perturbations to demonstrate the reliability and efficiency of the controllers under different system scenarios. Finally, a detailed explanation of the performance of the controllers is given, showing that the two algorithms are suitable for controlling the point of maximum power in photovoltaic panels.

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