Tampere University of Technology

TUTCRIS Research Portal

A novel strategy for optimal placement of locally controlled voltage regulators in traditional distribution systems

Research output: Contribution to journalArticleScientificpeer-review


Original languageEnglish
Pages (from-to)11-22
Number of pages12
JournalInternational Journal of Electrical Power and Energy Systems
Early online date29 Sep 2017
Publication statusPublished - 2018
Publication typeA1 Journal article-refereed


In this paper, an approach for placement of voltage regulators (VRs) in traditional distribution systems by considering a local controller model is presented. The main aims of this paper are controlling the voltage level in its permitted range and decreasing the costs imposed to the distribution system companies, such as costs that stem from power losses, VRs’ investment and maintenance. Genetic algorithm (GA) has been used as a tool to determine the number, location and rated power of VRs. Since in traditional distribution systems, tap position determination of VRs is achieved by local controllers, local controller model is established to determine tap operations. A 70-bus distribution system is considered to prove the value of the presented approach. Effectiveness of the proposed approach and ineffectiveness and infeasibility of conventional approaches are presented in numerical studies. The presented approach allowed to eliminate voltage violation in all load conditions and a reduction of power losses of about 6% for the maximum load level.


  • Distribution systems planning, Genetic algorithm, Local controller, Set point, Tap position, Voltage regulator

Publication forum classification