{"title":"A new approach for mitigating voltage unbalance in a three-phase two-wire rural distribution network","authors":"","doi":"10.1016/j.epsr.2024.111042","DOIUrl":null,"url":null,"abstract":"<div><p>The three-phase two-wire distribution system is an unconventional proposal for the repowering of single wire earth return electrical networks, intended for use in remote rural areas as it allows cost reduction by using only two overhead conductors and the ground as the third phase. An intrinsic characteristic of this system is the voltage unbalance observed near the loads, resulting from impedance mismatches between overhead conductors and the ground. The main objective of this work is to explore methodologies for minimizing voltage unbalance by strategically introducing impedance elements in targeted sections of the distribution network. A novel simplified equation for line-to-line compensation based on network parameters, along with a precise computational methodology to determine optimal compensation values, are proposed as contributions to the state of the art. The simulations in MatLab/Simulink demonstrate that the arrangement in which the compensation elements are added to the system directly impacts the voltage unbalance. Moreover, the study demonstrates the efficacy of the developed computational methodology in effectively reducing unbalance within extensive distribution networks.</p></div>","PeriodicalId":50547,"journal":{"name":"Electric Power Systems Research","volume":null,"pages":null},"PeriodicalIF":3.3000,"publicationDate":"2024-09-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Electric Power Systems Research","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0378779624009283","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}
引用次数: 0
Abstract
The three-phase two-wire distribution system is an unconventional proposal for the repowering of single wire earth return electrical networks, intended for use in remote rural areas as it allows cost reduction by using only two overhead conductors and the ground as the third phase. An intrinsic characteristic of this system is the voltage unbalance observed near the loads, resulting from impedance mismatches between overhead conductors and the ground. The main objective of this work is to explore methodologies for minimizing voltage unbalance by strategically introducing impedance elements in targeted sections of the distribution network. A novel simplified equation for line-to-line compensation based on network parameters, along with a precise computational methodology to determine optimal compensation values, are proposed as contributions to the state of the art. The simulations in MatLab/Simulink demonstrate that the arrangement in which the compensation elements are added to the system directly impacts the voltage unbalance. Moreover, the study demonstrates the efficacy of the developed computational methodology in effectively reducing unbalance within extensive distribution networks.
期刊介绍:
Electric Power Systems Research is an international medium for the publication of original papers concerned with the generation, transmission, distribution and utilization of electrical energy. The journal aims at presenting important results of work in this field, whether in the form of applied research, development of new procedures or components, orginal application of existing knowledge or new designapproaches. The scope of Electric Power Systems Research is broad, encompassing all aspects of electric power systems. The following list of topics is not intended to be exhaustive, but rather to indicate topics that fall within the journal purview.
• Generation techniques ranging from advances in conventional electromechanical methods, through nuclear power generation, to renewable energy generation.
• Transmission, spanning the broad area from UHV (ac and dc) to network operation and protection, line routing and design.
• Substation work: equipment design, protection and control systems.
• Distribution techniques, equipment development, and smart grids.
• The utilization area from energy efficiency to distributed load levelling techniques.
• Systems studies including control techniques, planning, optimization methods, stability, security assessment and insulation coordination.