Distribution Grid Admittance Estimation with Limited Non-Synchronized Measurements
This work addresses the practical challenge of grid admittance estimation for distribution system operators with limited measurement infrastructure, offering a low-complexity solution suitable for online applications.
The paper proposes a method for estimating radial distribution grid admittance matrices using limited non-synchronized measurements, achieving accurate estimates even for lines without local measurement devices, as demonstrated on a real-world grid in Vienna.
In this paper, we propose a method for estimating radial distribution grid admittance matrix using a limited number of measurement devices. Neither synchronized three-phase measurements nor phasor measurements are required. After making several practical assumptions, the method estimates even impedances of lines which have no local measurement devices installed. The computational complexity of the proposed method is low, and this makes it possible to use for on-line applications. The effectiveness of the proposed method is tested using data from a real-world distribution grid in Vienna, Austria.