An Enhanced SOCP-Based Method for Feeder Load Balancing Using the Multi-Terminal Soft Open Point in Active Distribution Networks

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

Research output: Contribution to journalArticlepeer-review

131 Scopus Citations

Abstract

The integration of distributed generators (DGs) exacerbates the feeder power flow fluctuation and load unbalanced condition in active distribution networks (ADNs). The unbalanced feeder load causes inefficient use of network assets and network congestion during system operation. The flexible interconnection based on the multi-terminal soft open point (SOP) significantly benefits the operation of ADNs. The multi-terminal SOP, which is a controllable power electronic device installed to replace the normally open point, provides accurate active and reactive power flow control to enable the flexible connection of feeders. An enhanced SOCP-based method for feeder load balancing using the multi-terminal SOP is proposed in this paper. By regulating the operation of the multi-terminal SOP, the proposed method can mitigate the unbalanced condition of feeder load and simultaneously reduce the power losses of ADNs. Then, the original non-convex model is converted into a second-order cone programming (SOCP) model using convex relaxation. To tighten the SOCP relaxation and improve the computation efficiency, an enhanced SOCP-based approach is developed to solve the proposed model. Finally, case studies are performed on the modified IEEE 33-node system to verify the effectiveness and efficiency of the proposed method.

Original languageAmerican English
Pages (from-to)986-995
Number of pages10
JournalApplied Energy
Volume208
DOIs
StatePublished - 15 Dec 2017

Bibliographical note

Publisher Copyright:
© 2017 Elsevier Ltd

NREL Publication Number

  • NREL/JA-5D00-70167

Keywords

  • Distributed generator (DG)
  • Enhanced second-order cone programming
  • Feeder load balancing
  • Flexible interconnection
  • Multi-terminal soft open point (SOP)

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