Big Data Analysis with Key Performance Indicators for Reactive Power Balance and Associated Voltage Quality Visual Mapping in the North-Western Part of the Danish Grid

Peter Jan Randewijk, Boye C. Knutz, Anders Steen Kristensen

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review


This paper will explain how steady state voltage quality in a power system (in terms of voltage limits) is affected when overhead transmission lines are converted to underground cables. Furthermore, it will be showed how the voltage quality can be analysed from Big Data (SCADA) measurements using Key Performance Indicators (KPIs).

Overhead lines and underground cables act very differently due to the difference in their reactive properties. The reason behind this will be briefly explained. A PowerFactory simulation showing the issues of reactive power transport with, and without, the necessary compensation equipment, will also be shown. Operation of synchronous machines and transformers are severely affected by over-voltages and this will compromise the security of supply if voltages are not maintained within limits. To highlight the consequences, Key Performance Indicators (KPIs) are used to score the quality based on voltage magnitude and the operation of local compensation units. The developed KPIs are then applied to real-world data from the northwest part of Denmark to prove the negative impact on voltage quality.
Original languageEnglish
Title of host publication2019 54th International Universities Power Engineering Conference (UPEC)
Number of pages6
Publication date2019
ISBN (Print)978-1-7281-3350-8
ISBN (Electronic)978-1-7281-3349-2
Publication statusPublished - 2019
Event54th International Universities Power Engineering Conference - University POLITEHNICA of Bucharest , Bucharest, Romania
Duration: 3 Sep 20196 Sep 2019


Conference54th International Universities Power Engineering Conference
LocationUniversity POLITEHNICA of Bucharest
Internet address

Cite this