Establishing transparency for distribution grid planning and operation using methods of state estimation

摘要

The integration of distributed energy resources in distribution grids leads to new challenges for planning and operation as uncertainty about the grid state is increased concurrently. State estimation can identify the grid state in distribution grids with little measurements in place. In this paper a low voltage grid in Germany was analysed. It was found that the estimates of the grid states in a high temporal resolution are of suitable accuracy and can be used for deriving relevant cases to be considered in grid planning. The three-phase implementation allows the analysis of both the voltage magnitude and the differences in phase voltages.