Identification of the resonant-grounded system parameters by evaluating fault measurement records

Rastko Živanović, Peter Schegner, Olaf Seifert, Georg Pilz

Research output: Contribution to journalArticlepeer-review

37 Citations (Scopus)

Abstract

The operation of a resonant-grounded network during an earth-fault condition depends on the three basic parameters: damping, detuning, and unbalance factor. These parameters are influenced by the environmental conditions (e.g. humidity, temperature, and pollution), and the network topology. Accurate values of these parameters during an earth-fault condition are required to examine the operation of the compensation system. The fault records could be used for that purpose. The recorded neutral-to-ground voltage signals have been parameterized (using damping and detuning as parameters) according to the mathematical model of the transient process. Iteratively reweighted least squares algorithm has been used to fit the model. This algorithm is the major improvement over the classical least squares approach. It is able to filter out noise more efficiently. As a direct result, very accurate parameter identification has been achieved. This paper concludes with the practical examples.

Original languageEnglish
Pages (from-to)1085-1090
Number of pages6
JournalIEEE Transactions on Power Delivery
Volume19
Issue number3
DOIs
Publication statusPublished - Jul 2004
Externally publishedYes

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