Substitution of electrolytic capacitors commonly used in solar inverters by film capacitors specifically designed for the application

Abstract

Trabajo fin de Máster supervisado por Jorge Aguilera Tejero. Se presenta una revisión de topologías de inversores solares, enfocándose en las tecnologías usadas para el diseño del banco DC-link de condensadores. Se presenta un nuevo diseño de condensador de cinta apropiado para el uso en inversores solares. Se repasan sus características y se comparan con las que ofrecen otras tecnologías de condensadores, principalmente, los electrolíticos// Capacitors are profusely used in photovoltaic systems as protecting elements for people and the equipment, also as filters and, more specifically, in the solar inverter in the so-called DC-Link position. The operation of the solar generators is certainly singular both in the environmental operating conditions but also in the electrical conditions that their subsystems must withstand during operation. On the one hand, they are usually subjected to strong variations and possible over-voltages. On the other hand, the high quality and reliability levels increasingly demanded by designers and final users of the equipments should be added to these special requirements.