Conducted EMI Emission Evaluation Considerations for Lab Test Site and in-Situ Measurements of DC Microgrid Supplied Power Converters

Control of EMI in the DC microgrid supply systems is required to ensure the proper unperturbed operation of all power electronic converters connected. While a discussion on the compatibility level settings is going on for the normative statements, it is evident that there would be at least some differences compared to the formal DC power port testing in the existing standards. As an example, the specifications found in the available normatives for different equipment types and operation specifics include both usage of V - and $\Delta$-topology artificial networks (AN). For on-site testing, the CISPRspecified voltage probes are referred to. Sensitivity of the measurement but also the dynamic range, can be different, as all the listed measurement networks are responsible for different transducer factor ratings. This paper provides an overview of basic prerequisites for testing DC power ports and evaluating devices for public or residential DC grid supply connections. Attention is given to the measurement coupling devices for conducted spurious noise measurements and sensitivity requirements. Lab test and on-site measurement outcomes in regards to reference levels is detailed. A discussion on selecting an appropriate environment for on-site testing and verifying normative limits is presented.