Fraunhofer IEE is upgrading its laboratory with new megawatt testing equipment for over-voltage ride through

To keep pace with the latest changes to grid codes and testing standards the facilities of German Fraunhofer-Institut für Energiewirtschaft und Energiesystemtechnik IEE’s laboratory SysTec have recently been upgraded by an over-voltage-ride-through (OVRT) test container. The new testing equipment is designed to analyze the dynamic behavior of wind turbines, photovoltaic inverters and combined heat and power units during short time over voltages of the supply voltage. Since the revision of German grid codes in fall 2018 riding through short-term voltage swells now also became a requirement for generating plants installed in regional and local distribution grids, says the institute.
According to the recent revision of the German VDE grid codes the laboratories of Fraunhofer IEE were now completed with an OVRT test equipment for a maximum power of 6 MVA. The test container allows generation of short-term over-voltage events of up to 140 percent of nominal voltage. The new testing equipment was successfully set in operation in summer 2019; first tests now have been accomplished.

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