Coordinated Control Method of Voltage and Reactive Power for Active Distribution Networks Based on Soft Open Point

Fei Ding, Peng Li, Haoran Ji, Chengshan Wang, Jinli Zhao, Guanyu Song, Jianzhong Wu

Research output: Contribution to journalArticlepeer-review

318 Scopus Citations


The increasing penetration of distributed generators (DGs) exacerbates the risk of voltage violations in active distribution networks (ADNs). The conventional voltage regulation devices limited by the physical constraints are difficult to meet the requirement of real-time voltage and VAR control (VVC) with high precision when DGs fluctuate frequently. However, soft open point (SOP), a flexible power electronic device, can be used as the continuous reactive power source to realize the fast voltage regulation. Considering the cooperation of SOP and multiple regulation devices, this paper proposes a coordinated VVC method based on SOP for ADNs. First, a time-series model of coordinated VVC is developed to minimize operation costs and eliminate voltage violations of ADNs. Then, by applying the linearization and conic relaxation, the original nonconvex mixed-integer nonlinear optimization model is converted into a mixed-integer second-order cone programming model which can be efficiently solved to meet the requirement of voltage regulation rapidity. Case studies are carried out on the IEEE 33-node system and IEEE 123-node system to illustrate the effectiveness of the proposed method.

Original languageAmerican English
Article number7885092
Pages (from-to)1430-1442
Number of pages13
JournalIEEE Transactions on Sustainable Energy
Issue number4
StatePublished - Oct 2017

Bibliographical note

Publisher Copyright:
© 2010-2012 IEEE.

NREL Publication Number

  • NREL/JA-5D00-68178


  • Active distribution network (ADN)
  • distributed generator (DG)
  • mixed-integer second-order cone programming (MISOCP)
  • soft open point (SOP)
  • voltage and VAR control (VVC)


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