Supraharmonic Interactions between Multiple Devices within Different Local Low Voltage Grid Structures Christian Waniek, Thomas Wohlfahrt, Johanna M.A. Myrzik, Jan Meyer and Peter Schegner   2018/04/20

Abstract

In this paper, the effects of the interaction between multiple devices and with the low voltage grid concerning the devices’ supraharmonic or high frequency emission and immunity in the frequency range between 2 kHz and 150 kHz are presented based on a laboratory set up. This set up consists of two photovoltaic (PV) inverters that represent the main source of supraharmonic disturbances and three typical household devices for a realistic depiction of a typical local grid structure. In order to determine the impact of the grid impedance, the whole installation is connected to six different grid impedances that are derived from previously performed grid impedance measurements within the research project VeNiFre150. The corresponding grid impedance values are also shorty presented.

Authors and affiliations

Christian Waniek1, Thomas Wohlfahrt1, Johanna M.A. Myrzik1, Jan Meyer2 and Peter Schegner2
1. Institute of Energy Systems, Energy Efficiency and Energy Economics. TU Dortmund University. Dortmund (Germany)
2. Institute of Electrical Power Systems and High Voltage Engineering. Technische Universitaet Dresden. (Germany)

Key words

Supraharmonics, high frequency disturbances, interaction between devices, grid impedances.

References

[1] C. Unger, “Frequencies above the harmonic range - Challenge of the future?”, in Proc. 2010 IEEE International Power and Energy Conference (IPEC), pp. 763-766.
[2] M. Klatt, A. Koch, J. Meyer, P. Schegner, J. Myrzik, C. Körner, T. Darda, and G. Eberl, "Emission levels above 2kHz - Laboratory results and survey measurements in public low voltage grids", 22nd International Conference on Electricity Distribution (CIRED), Stockholm, Sweden, 2013.
[3] S. Rönnberg, A. Larsson, M. Bollen, and J.-L. Schanen, “A simple model for interaction between equipment at a frequency of some tens of kHz”, 21st International Conference on Electricity Distribution (CIRED), Frankfurt, Germany, 2011.
[4] C. Waniek, T. Wohlfahrt, J.M.A. Myrzik, J. Meyer, M. Klatt, and P. Schegner, “Supraharmonics: Root Causes and Interactions between Multiple Devices and the Low Voltage Grid”, 7th IEEE International Conference on Innovative Smart Grid Technologies (ISGT Europe), Torino, Italy, 2017.
[5] C. Waniek, T. Wohlfahrt, J.M.A. Myrzik, J. Meyer, and P. Schegner, “Topology Identification of Electronic Mass-Market Equipment for Estimation of Lifetime Reduction by HF Disturbances above 2 kHz”, 12th IEEE PES PowerTech Conference, Manchester, 2017.