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Title: An enhanced SOCP-based method for feeder load balancing using the multi-terminal soft open point in active distribution networks

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. Furthermore, 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. In order 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.

Authors:
 [1];  [1]; ORCiD logo [1];  [1];  [1]; ORCiD logo [2];  [3]
  1. Tianjin Univ. (China). Key Lab. of Smart Grid of Ministry of Education
  2. National Renewable Energy Lab. (NREL), Golden, CO (United States)
  3. Cardiff Univ. (United Kingdom). Inst. of Energy, School of Engineering
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1399850
Report Number(s):
NREL/JA-5D00-70167
Journal ID: ISSN 0306-2619
Grant/Contract Number:  
AC36-08GO28308
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Applied Energy
Additional Journal Information:
Journal Volume: 208; Journal Issue: C; Journal ID: ISSN 0306-2619
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
24 POWER TRANSMISSION AND DISTRIBUTION; distributed generator; flexible interconnection; multi-terminal soft open point; feeder load balancing; enhanced second-order cone programming

Citation Formats

Ji, Haoran, Wang, Chengshan, Li, Peng, Zhao, Jinli, Song, Guanyu, Ding, Fei, and Wu, Jianzhong. An enhanced SOCP-based method for feeder load balancing using the multi-terminal soft open point in active distribution networks. United States: N. p., 2017. Web. doi:10.1016/j.apenergy.2017.09.051.
Ji, Haoran, Wang, Chengshan, Li, Peng, Zhao, Jinli, Song, Guanyu, Ding, Fei, & Wu, Jianzhong. An enhanced SOCP-based method for feeder load balancing using the multi-terminal soft open point in active distribution networks. United States. doi:10.1016/j.apenergy.2017.09.051.
Ji, Haoran, Wang, Chengshan, Li, Peng, Zhao, Jinli, Song, Guanyu, Ding, Fei, and Wu, Jianzhong. Wed . "An enhanced SOCP-based method for feeder load balancing using the multi-terminal soft open point in active distribution networks". United States. doi:10.1016/j.apenergy.2017.09.051. https://www.osti.gov/servlets/purl/1399850.
@article{osti_1399850,
title = {An enhanced SOCP-based method for feeder load balancing using the multi-terminal soft open point in active distribution networks},
author = {Ji, Haoran and Wang, Chengshan and Li, Peng and Zhao, Jinli and Song, Guanyu and Ding, Fei and Wu, Jianzhong},
abstractNote = {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. Furthermore, 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. In order 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.},
doi = {10.1016/j.apenergy.2017.09.051},
journal = {Applied Energy},
number = C,
volume = 208,
place = {United States},
year = {Wed Sep 20 00:00:00 EDT 2017},
month = {Wed Sep 20 00:00:00 EDT 2017}
}

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