Importância da função ride-through em inversores de frequência na mitigação das variações de tensão de curta duração

Abstract

Industrial production processes have suffered heavy losses due to a power quality problem known as voltage sags. This issue is subtle, often difficult to notice, as it can happen in milliseconds and with a magnitude of only 0.9 pu. That can cause a suddenly production disruptions. The globalized world compel companies to invest heavily in automation to increase productivity while reducing their cost. It turns out that electronic devices may not operate under proper conditions in the event of a voltage sags. In this monography we discuss the importance of the ride-through function as a mitigation resource for this problem, performing laboratory tests to prove its effectiveness and its operational limits. When specify adjustable-speed drive, it is important to know how to get the most out of its functions. Throughout this work are described how the tests performed and their results. These results were discuss and analyzed to present on the conclusions some suggestions to mitigate the voltage sags disturbances on an adjustable-speed drive ride-through function, and suggest engineering good practices in the production processes on an industrial facilities.