Modelling Low Frequency Oscillations in an Electrical System

Due to market integration, energy trading and the stronger weighting on renewable energies, the European electrical transmission system operates increasingly close to its operational limits. A potential of the usable bandwidth is a part of the energy that oscillates with low frequency through the electrical transmission system. Our analysis leads to a new model which uses connected mechanical harmonic oscillators to describe the low frequency in the transmission system. The verification of this system of differential equations is done by comparison to a well established and much more complex simulation system used at the ie3 of TU Dortmund University. The derived model is capable to process data from a Co-Simulator without any data preparation, which is an important requirement to link the statistical analysis in an on-line environment.