Interaction of state estimation and sensitivty analysis for the operation of a real flexible distribution grid

摘要

In the following paper a sensitivity analysis based on state estimation methods is presented. The analysis is performed for a real low voltage grid and the suitability for real-time applications is demonstrated. The term sensitivity hereby expresses the impact of a load flow modification in a particular node with respect to other node voltages, line currents and transformer loadings. The overall errors of the sensitivity values are investigated with the help of symmetrical simulations, as well as evaluations of unsymmetrical field test scenarios. Recommendations for a practical implementation within a flexible distribution grid are given.