Distribution Grid Admittance Estimation with Limited Non-Synchronized Measurements

TL;DR

This paper introduces a low-complexity method for estimating the admittance matrix of radial distribution grids using limited, non-synchronized measurements, enabling real-time applications without requiring phasor data.

Contribution

It presents a novel approach that estimates grid admittance and line impedances without synchronized measurements or local devices, suitable for online use.

Findings

Effective in real-world distribution grid data

Does not require synchronized or phasor measurements

Low computational complexity

Abstract

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.