Determination of Radiated Emissions from Wind Energy Conversion Systems

This paper presents a measuring concept for determining the radiated electromagnetic emissions from wind turbines. The need for a more precise measurement specification for wind turbines will be explained with reference to a procedure, which is according to the normative situation. Then, an approach to simplify the determination of radiated electromagnetic fields by using a measurement of common-mode (CM) current is presented. It is shown that a measurement of the CM current indicates the frequencies, where an increased emission can be expected, in particular on the magnetic field. Thus, the technical effort and the measurement uncertainty are significantly reduced when determining the magnetic field of a wind turbine.