Frequency-dependent grid impedance measurement
The structure of the transmission grid is changing significantly, due to many causes such as the dismantling of conventional power plants and the associated addition of compensation plants, the development of decentralized generators and the addition of power and cable lines.
This reconstruction results in a change in the grid impedance, in which unpleasant conditions must be avoided.
In high and extra-high voltage, the network impedances are usually determined by means of network calculations. However, these network calculations are based on simulations in which the inclusion of the frequency dependence of the equipment is questionable. Therefore, a measurement of the actual grid impedance is considered useful to enable a detailed assessment of the grid impedance as well as the amplification of grid perturbations.
A great added value of measurement is the possibility to validate simulation models based on measured data. Furthermore, a measurement offers the possibility to clarify concrete questions about resonances in the network.
