APPLICATION OF MEASUREMENT METHODS FOR THE FREQUENCY RANGE 2-150 KHZ TO LONG-TERM MEASUREMENTS IN PUBLIC LOW VOLTAGE NETWORKS

This paper studies the feasibility of selected measurement methods in the frequency range 2-150 kHz in the application to long-term field measurements. Disturbance measurements over days and weeks carried out at different sites in public low voltage networks provide the basis for analysis. Measurements are taken continuously and cover the typical variation of disturbance levels caused by the changing operating points of the connected disturbance sources. The analysis focuses on the suitability of obtained measurement results for different objectives, namely reflection of relevant interference mechanisms and assessment against compatibility levels. The paper summarizes the results of the analysis and intends to provide input for the present activities in IEC SC77A WG9 to define a normative measurement method for network measurements in the frequency range 2-150 kHz to be included in the next edition of IEC 61000-4-30