Coordinated two-stage volt/var management in distribution networks

Lesiba Mokgonyana, Jiangfeng Zhang, Lijun Zhang, Xiaohua Xia

Research output: Contribution to journalArticle

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Abstract

This paper investigates daily volt/var control in distribution networks using feeder
capacitors as well as substation capacitors paired with on-load tap changers. A twostage
coordinated approach is proposed. Firstly, the feeder capacitor dispatch schedule
is determined based on reactive power heuristics. Then, an optimisation model is
applied to determine the dispatch schedule of the substation devices taking into account
the control actions of the feeder capacitors. The reference voltage of the substation
secondary bus and the tap position limits of transformers are modified such that the
model adapts to varying load conditions. The optimisation model is solved with a
modified particle swarm optimisation algorithm. Furthermore, the proposed method
is compared with conventional volt/var control strategies using a distribution network
case study. It is demonstrated that the proposed approach performs better than the
conventional strategies in terms of voltage deviation and energy loss minimisation.
Original languageEnglish
Number of pages23
JournalElectric Power Systems Research
Publication statusAccepted/In press - 11 Jul 2016

Fingerprint

Electric power distribution
Capacitors
Electric potential
Reactive power
Particle swarm optimization (PSO)
Energy dissipation

Keywords

  • capacitor
  • distribution networks
  • energy loss
  • on-load tap changer
  • particle swarm optimisation
  • particle swarm optimization
  • volt/var control
  • feeder capacitors
  • substation capacitors
  • reactive power heuristics
  • dispatch schediule
  • optimisation model

Cite this

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title = "Coordinated two-stage volt/var management in distribution networks",
abstract = "This paper investigates daily volt/var control in distribution networks using feedercapacitors as well as substation capacitors paired with on-load tap changers. A twostagecoordinated approach is proposed. Firstly, the feeder capacitor dispatch scheduleis determined based on reactive power heuristics. Then, an optimisation model isapplied to determine the dispatch schedule of the substation devices taking into accountthe control actions of the feeder capacitors. The reference voltage of the substationsecondary bus and the tap position limits of transformers are modified such that themodel adapts to varying load conditions. The optimisation model is solved with amodified particle swarm optimisation algorithm. Furthermore, the proposed methodis compared with conventional volt/var control strategies using a distribution networkcase study. It is demonstrated that the proposed approach performs better than theconventional strategies in terms of voltage deviation and energy loss minimisation.",
keywords = "capacitor, distribution networks, energy loss, on-load tap changer, particle swarm optimisation, particle swarm optimization, volt/var control, feeder capacitors, substation capacitors, reactive power heuristics, dispatch schediule, optimisation model",
author = "Lesiba Mokgonyana and Jiangfeng Zhang and Lijun Zhang and Xiaohua Xia",
note = "{\circledC} 2016. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/",
year = "2016",
month = "7",
day = "11",
language = "English",
journal = "Electric Power Systems Research",
issn = "0378-7796",

}

Coordinated two-stage volt/var management in distribution networks. / Mokgonyana, Lesiba; Zhang, Jiangfeng; Zhang, Lijun; Xia, Xiaohua.

In: Electric Power Systems Research, 11.07.2016.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Coordinated two-stage volt/var management in distribution networks

AU - Mokgonyana, Lesiba

AU - Zhang, Jiangfeng

AU - Zhang, Lijun

AU - Xia, Xiaohua

N1 - © 2016. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/

PY - 2016/7/11

Y1 - 2016/7/11

N2 - This paper investigates daily volt/var control in distribution networks using feedercapacitors as well as substation capacitors paired with on-load tap changers. A twostagecoordinated approach is proposed. Firstly, the feeder capacitor dispatch scheduleis determined based on reactive power heuristics. Then, an optimisation model isapplied to determine the dispatch schedule of the substation devices taking into accountthe control actions of the feeder capacitors. The reference voltage of the substationsecondary bus and the tap position limits of transformers are modified such that themodel adapts to varying load conditions. The optimisation model is solved with amodified particle swarm optimisation algorithm. Furthermore, the proposed methodis compared with conventional volt/var control strategies using a distribution networkcase study. It is demonstrated that the proposed approach performs better than theconventional strategies in terms of voltage deviation and energy loss minimisation.

AB - This paper investigates daily volt/var control in distribution networks using feedercapacitors as well as substation capacitors paired with on-load tap changers. A twostagecoordinated approach is proposed. Firstly, the feeder capacitor dispatch scheduleis determined based on reactive power heuristics. Then, an optimisation model isapplied to determine the dispatch schedule of the substation devices taking into accountthe control actions of the feeder capacitors. The reference voltage of the substationsecondary bus and the tap position limits of transformers are modified such that themodel adapts to varying load conditions. The optimisation model is solved with amodified particle swarm optimisation algorithm. Furthermore, the proposed methodis compared with conventional volt/var control strategies using a distribution networkcase study. It is demonstrated that the proposed approach performs better than theconventional strategies in terms of voltage deviation and energy loss minimisation.

KW - capacitor

KW - distribution networks

KW - energy loss

KW - on-load tap changer

KW - particle swarm optimisation

KW - particle swarm optimization

KW - volt/var control

KW - feeder capacitors

KW - substation capacitors

KW - reactive power heuristics

KW - dispatch schediule

KW - optimisation model

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M3 - Article

JO - Electric Power Systems Research

JF - Electric Power Systems Research

SN - 0378-7796

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