Nuevo inversor fotovoltaico integrado sin transformador

Jeziel Vázquez Nava, Nimrod Vazquez Nava, Héctor Juan Carlos López Tapia, Claudia V. Hernández Gutiérrez, Joaquín Vaquero

Resumen


Los inversores sin transformador son ampliamente utilizados en sistemas fotovoltaicos conectados a la red eléctrica, debido a los beneficios de lograr alta eficiencia y bajo costo.
El inversor fotovoltaico sin transformador puede generar una corriente de fuga entre el inversor y la red eléctrica, a través de la capacitancia parásita del módulo fotovoltaico y la tierra física. Esta corriente de fuga provoca una disminución de la eficiencia, reduce el tiempo de vida del módulo fotovoltaico y pone en riesgo al personal que esté en contacto con el sistema. Se han propuesto varias topologías de inversores sin transformador para reducir esta corriente de fuga; este trabajo propone una topología diferente que consiste en la integración de dos etapas, un inversor puente completo y un convertidor CD/CD elevador. Una terminal de salida del inversor está conectada directamente a tierra y el convertidor es controlado por modos deslizantes.

Palabra(s) Clave(s): control por modos deslizantes, corriente de fuga, inversor fotovoltaico.


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