Análise das Variações Rápidas de Potência e Tensão em Sistemas de Distribuição com Geração Fotovoltaica Operando sob Condições de Nuvens

Abstract

The operation of distribution systems with photovoltaic distributed generation units on cloudy days is an increasing challenge. Photovoltaic generation operating under cloud conditions may result in fast power and voltage variations that affect the power quality and performance of step voltage regulators typically used in medium voltage networks. In this context, the present work proposes analyses of power and voltage fast variations in a distribution system with photovoltaic distributed generation units operating under cloud conditions. The use of realistic operational assumptions, typically not considered simultaneously in other works, is one of the innovative contributions of this work. The analyses are carried out through computer simulations in the time domain considering the typical control loops of the generation units and different shading conditions synthesized by an approach based on fractal geometry. The IEEE 34-node distribution system is used as a test system in the carried-out analyses.