September 16, 2020 Two papers were presented to the Conference for Precision Electromagnetic Metrology (CPEM 2020). One paper described a new real-time algorithm to measure supra harmonics in the frequency range 2-150kHz which will be used to measure conducted interference on the electricity network. This interference is often caused by renewable energy and EV power convertors which leads to domestic appliance malfunction. On the same subject, a second paper compares a range of published methods for supra harmonic measurements which will be used to aid selection of a new normative method by IEC SC77A. Open access links will be published to these papers as soon as they are available. Full versions of these papers have been submitted for peer review to the IEEE Transactions.