Abstract
The Fraunhofer-Institute for Wind Energy Systems IWES is developing a new multi-megawatt testing facility for low voltage wind turbine converters. The new facility focuses on examining the frequency converters' electrical behaviour in a wide frequency range from fundamental frequency up to the 200th harmonic. This paper presents an overview of the project, the design principles of the facility and select preliminary simulations of its grid emulation capabilities. The simulations comprise of a demonstration of the grid emulator's voltage control and the emulation of both linear and non-linear frequency-dependent grid impedances. The simulations exhibit promising results of the new testing facility regarding accuracy of emulation and usable frequency range.
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