Voltage Quality Index Based Method to Quantify the Advantages of Optimal DG Placement

Mohsin Shahzad, Wolfgang Gawlik, Peter Palensky

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

3 Citations (Scopus)


This paper presents the advantages of the optimal DG placement during the operation stage of the radial distribution system. The method taken for optimal DG placement (ODGP) is considered from our previous work, which gives optimal locations based on Load Concentration Factor (LCF). Various cases of random DG placement (RDGP) are considered which are divided into two main categories. In first, the locations are varied and in second DG sizes are rotated on same locations found by LCF method. In all these cases, the total active power delivered by the DGs is kept same as for the case of ODGP. The load growth in network is considered to correspond to the future operational stage. A novel Voltage Quality Index (VQI) is proposed in this work which provides a straightforward method for quantifying the system's voltage quality status. Furthermore, two different scenarios, with and without a centralized voltage control algorithm, are considered for the comparison purpose. The advantages of ODGP in all these cases are highlighted by comparing the active power loss reduction, and voltage profile and quality improvement. The results showed that, in case of voltage problem, algorithm could improve voltage to a better limit, while keeping the losses reduced, in case of ODGP than RDGP cases.
Original languageEnglish
Title of host publicationProceedings - 18th International Middle-East Power Systems Cnference, MEPCON 2016
EditorsOmar H. Abdalla
Place of PublicationPiscataway, NJ
Number of pages6
ISBN (Print)978-1-4673-9063-7
Publication statusPublished - 2016
Event18th International Middle-East Power Systems Conference, MEPCON 2016 - Cairo, Egypt
Duration: 27 Dec 201629 Dec 2016


Conference18th International Middle-East Power Systems Conference, MEPCON 2016


  • active power loss
  • distributed generation
  • analytical expressions
  • simultaneous optimal sizing
  • load growth
  • voltage quality index
  • voltage profile

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