Determination of the voltage and frequency dependent behaviour of low voltage grids – test procedure for a modified mobile generator

Abstract

In the LINDA project a control approach for island grids was developed which enables the use of renewable energy sources during emergency power supply. A black start unit sets up an island grid. To find proper parameters for the controller of the black start unit, knowledge about the static and dynamic behaviour of the distribution grid, induced by fluctuations of voltage and frequency, is essential. During the research project LINDA 2.0, supported by the German Ministry for Economic Affairs and Energy, this concept of applying an emergency power supply should be transferred to other grid areas. To get an actual database about the aggregated grid behaviour, a mobile generator will be used during grid maintenance work to determine the parameters for a frequency and voltage dependent model of the supplied sub-networks. The measurement procedure and control concept for the mobile generator is introduced in this paper.