Measurement Procedures and Uncertainty Evaluation for Electromagnetic Radiated Emissions from Large Power Electrical Machinery

International audienceMethods of measurement and data analysis are considered for the electromagnetic (e.m.) emissions of large power rotating machinery (in this paper a synchronous generator is considered as working example). The data recorded during two measurement campaigns are used to proof the analysis methods and to better describe the measurement procedures. Several important factors are considered: the reactive behavior of the field, site attenuation and antenna factor determination, the physical dimensions of the source of emissions and its impact on correction factor uncertainty, the e.m. environment and the ambient e.m. noise, practical factors (including safety distances, reproducible test conditions, etc.) that limit the choice of the measuring position and distance and determine measurement accuracy