Andrea Schaefer M.Sc.

Working area(s)

Investigations of harmonics in the transmission grid


work +49 6151 16-24679
fax +49 6151 16-24665

Work S3|10 208
Landgraf-Georg-Straße 4
64283 Darmstadt

“I studied Electrical Engineering, Information Technology and Computer Engineering with the focus on power engineering at RWTH Aachen University. During my studies, I completed a research stay at the Central University of Technology in Bloemfontein (South Africa) and an internship at DONG Energy in Denmark.

Already during my bachelor studies my main focus was on the topic of electrical grids. I wrote my bachelor thesis at the Institute of Power Systems and Power Economics (IAEW) about the assessment of uncertainties in electrical grid expansion planning. In my master thesis, also written at IAEW, I developed a distribution grid model for the simulation of transmission grid operation.”

In the course of the energy turnaround and the associated expansion of the electricity grid, there is an increasing demand for the use of underground cables. With increasing underground cabling, the grid impedance changes due to the capacitive character of the cables, which leads to a shift in resonance frequencies. In my research, I therefore investigate the effects of underground cabling in the transmission network on harmonics and resonances in the transmission network. Further on, I deal with the influence of harmonics on the stability in the grid.

Central aspects in this context are:

  • Harmonics and resonances in the transmission grid
  • Underground cabling in the transmission grid
  • Factors influencing stability in the transmission grid.