skip to main content


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

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. But, 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. Firstly, a time-series model of coordi-nated 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 non-linear optimization model is converted into a mixed-integer second-order cone programming (MISOCP) model which can be efficiently solved to meet the requirement of voltage regulation rapidity. Here, we carried out some case studies on the IEEE 33-node system and IEEE 123-node system to illustrate the effectiveness of the proposed method.
 [1] ;  [2] ;  [1] ;  [1] ;  [1] ;  [3] ;  [4]
  1. Tianjin Univ. (China). Key Lab. of Smart Grid of Ministry Education
  2. Tianjin Univ. (China). Key Lab. of Smart Grid of Ministry of Education
  3. National Renewable Energy Lab. (NREL), Golden, CO (United States)
  4. Cardiff Univ., Cardiff (United Kingdom). Institute of Energy, School of Engineering
Publication Date:
Report Number(s):
Journal ID: ISSN 1949-3029
Grant/Contract Number:
Accepted Manuscript
Journal Name:
IEEE Transactions on Sustainable Energy
Additional Journal Information:
Journal Volume: 8; Journal Issue: 4; Journal ID: ISSN 1949-3029
Research Org:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org:
National Key Technology Research and Development Program of China; National Natural Science Foundation of China (NNSFC); USDOE
Country of Publication:
United States
24 POWER TRANSMISSION AND DISTRIBUTION; active distribution network; ADN; distributed generator; DG; soft open point; SOP; voltage and VAR control; VVC; mixed-integer second-order cone programming; MISOCP
OSTI Identifier: