The experimental results of an islanding detection method for Japanese AC modules

Recently, AC modules are familiarized in Europe and US. However, there are still several problems, which need to be dealt with, for instance islanding that is one of major requirements for grid connection of solar modules in Japan. In this study, an islanding detection algorithm has been newly developed according to a sequential approach and its basic operation has been confirmed. The purpose of this study is to find the optimum detecting thresholds by different experiments, that means by single and multiple operations. Here, several developed inverters together with newly developed ones with the algorithm were examined regarding islanding detections. In this paper, the results including test methods, conditions, observed waveforms are presented. This paper proposes an islanding detecting function for Japanese AC module from comparison of usual MIC and PVPC point of view.