A joint stakeholder workshop with the EMPIR project FutureGrid II was held on 24 September in Aachen (Germany) at the E.ON Energy Research Center. Project coordinator Gert Rietveld gave an introductory presentation, followed by an interactive poster session displaying the latest achievements.The stakeholder workshop was combined with the IEEE international workshop on Applied Measurements for Power Systems (AMPS 2019). The posters from the stakeholder workshop were also shown at this conference.
Commercial LMS are widely used by High Voltage (HV) transformer and reactor manufacturers. Typical state-of-the-art accuracies in industrial loss measurements are in the range of 1-3 % for power factors down to 0.01, corresponding to an LMS uncertainty of 100–300 µW/VA. Driven by the Ecodesign Directive, utility companies are now calling for 3-5 % accuracies down to a power factor of 0.001, particularly for shunt reactors, requiring LMS uncertainties of 30-50 µW/VA.
In the ELPOW project, a reference setup for reactor loss measurement was produced with a voltage range of 500 V, as well as reference setups for calibration of transformer LMS up to 100 kV but with an uncertainty of only 50 µW/VA. As required by the power transformer community, this project is realising the extension of this reactor measurement setup to the multi-kV range whilst still maintaining high accuracy. Furthermore present primary reference setups at National Metrology Institutes (NMIs) are being improved by a factor of 2– 5 in uncertainty to better than 20 W/VA.
An important extension of the state of the art is a study of detrimental factors that occur on-site in the industrial environment where these systems are used, such as interference and non-sinusoidal input signals. This will ensure that the required challenging uncertainties can be achieved by industrial end-users. Given the complexity of loss measurements, the uncertainty evaluation of these measurements is also complex. Therefore the project is developing good practice guides to provide end-users with the necessary guidance in this uncertainty evaluation, extending the present guidance of the IEC 60076-19 standard.
The TrafoLoss project was officially started with a kick-off meeting on 2-3 May 2018 at VSL in Delft (The Netherlands).