Revista Eletrônica de Potência (Brazilian Journal of Power Electronics)

Palavras Chaves: qualidade da energia, Sistema Fotovoltaico

Resumo
Neste artigo, um condicionador de potência de quatro fios é proposto para conectar os painéis fotovoltaicos à rede elétrica. Este condicionador visa injetar potência ativa na rede e, ao mesmo tempo, melhorar a qualidade da energia quando há cargas desequilibradas e não lineares no sistema elétrico. Assim, são realizadas simulações computacionais para uma rede elétrica composta por dois sistemas fotovoltaicos conectados a um sistema elétrico e um conjunto de cargas com características desequilibradas, harmônicas e lineares. Inicialmente, os dois sistemas fotovoltaicos são conectados à rede por meio de inversores trifásicos. Em seguida, um dos inversores é substituído pelo condicionador de potência proposto. Com este estudo, constatou-se que o condicionador de potência proposto utilizado para conectar a geração fotovoltaica à rede elétrica contribui significativamente para suprimir correntes harmônicas e desequilibradas, trazendo melhorias significativas na qualidade de energia do sistema elétrico analisado.

Title: ANALYSIS OF A PROPOSED POWER CONDITIONER IN PHOTOVOLTAIC GENERATION TO IMPROVE POWER QUALITY

Keywords: Photovoltaic System, Power quality

Abstract
In this article, a four-wire power conditioner is proposed to connect the photovoltaic panels to the power grid. This conditioner aims to inject active power into the network, and at the same time, improve the quality of energy when there are unbalanced and nonlinear loads in the electrical system. Thus, computer simulations are carried out for an electrical network consisting of two photovoltaic systems connected to an electrical system and a set of loads with unbalanced, harmonic and linear characteristics. Initially, the two photovoltaic systems are connected to the network by means of three-phase inverters. Then, one of the inverters is replaced by the proposed power conditioner. With this study, it was found that the proposed power conditioner used to connect the photovoltaic generation to the grid contributes significantly to suppress harmonic and unbalanced currents, bringing significant improvements in the power quality of the analyzed electrical system.

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