Method for determining background distortion of a real MV-network based on measured data

As part of the project EnEff: Stadt Campus Lichtwiese, a permanent Power Quality-Monitoring System has been installed in the medium-voltage network of the Campus Lichtwiese of Technical University of Darmstadt. The system enables measurement of harmonic distortion at each busbar of the network. The data measured is used to parametrise the network model of the campus for analysing its harmonic behaviour. In the course of this paper, the Campus Lichtwiese as well as the implemented monitoring system are presented. The latter is evaluated with regard to its measurement uncertainty. A method is introduced which, based on the measurement data and the network model of the campus, determines the background distortion at the point of common coupling (PCC) of the campus network, which in turn is used to parametrise the network model. Therefore the background distortion is firstly determined and secondly integrated into the model. The comparison between measurement and simulation at the PCC shows good conformity.