Abstract

Low-voltage distribution networks often suffer from incomplete or outdated network records, making it challenging to obtain the topology and line parameters under actual operating conditions. To address this issue, a joint identification method is proposed based on the propagation of load transient characteristics. First, the principle of load characteristic propagation is elaborated, and the concept of coupling impedance is introduced. Second, a set of linear regression equations is established based on the changes in current and voltage of the terminal measurements before and after load switching, and then these equations are solved using the least squares method to form the coupling impedance matrix. Finally, a node recursive algorithm is applied to iteratively derive the network topology and calculate line parameters in a bottom-up manner. Case studies show that by effectively extracting the information contained in the transient measurement dataset, the proposed method can correctly identify the network topology and accurately estimate line parameters even under three-phase imbalanced conditions, providing high practical value for engineering applications.

Department(s)

Electrical and Computer Engineering

Publication Status

Early Access

Keywords and Phrases

hidden nodes; line parameters calculation; load transient characteristic; Low-voltage distribution network; three-phase imbalance; topology identification

International Standard Serial Number (ISSN)

1949-3061; 1949-3053

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2025 Institute of Electrical and Electronics Engineers, All rights reserved.

Publication Date

01 Jan 2025

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