Optimal location of voltage sensors in low voltage networks for on-load tap changer application

Kalle Rauma (Corresponding Author), Florent Cadoux, Guillaume Roupioz, Adrien Dufournet, Nouredine Hadj-Said

Research output: Contribution to journalArticleScientificpeer-review

3 Citations (Scopus)


This study contemplates the possibility of estimating in near real-time the extreme voltages (minimum and maximum phase-to-neutral voltages) in a low voltage (LV) network using some, but as little as possible, advanced metering infrastructure (AMI) data. The main target application is to control an on-load tap changer at a secondary substation (medium voltage/LV substations) so as to maintain adequate voltage in the entire downstream LV network. The authors focus on the practical problem that consists in choosing the customers whose (AMI-based) voltage measurements will be used as inputs to the voltage control. They propose a method for the selection of customers that is based solely on statistical load profiles (without the need to resort to past AMI data) and they assess it using real-world data from 38 different French urban and semi-urban LV networks. The authors’ results show that working with simple load profiles instead of large amounts of past AMI data is acceptable, and that in most cases, choosing only a set of about ten customers at most is sufficient to guarantee an almost negligible level of error in the estimation of the minimum and maximum voltages in the LV network.

Original languageEnglish
Pages (from-to)3756-3764
Number of pages9
JournalIET Generation, Transmission and Distribution
Issue number15
Publication statusPublished - Oct 2017
MoE publication typeA1 Journal article-refereed


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