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Optimal Planning of Hybrid AC/DC Low-voltage Distribution Networks Considering DC Conversion of Three-phase Four-wire Low-voltage AC Systems

查看全文 作　　者：Bo [1]Zhang;Lu [1]Zhang;Wei [1]Tang;Gen [2]Li;Chen [3]Wang 高影响力作者 机构地区：[1]the College of Information and Electrical Engineering,China Agricultural University,Beijing 100083,China;[2]the Electric Energy Group,Department of Engineering Technology,Technical University of Denmark(DTU),2750 Ballerup,Denmark;[3]the Power Distribution Technology Center,State Grid Beijing Electric Power Research Institute,Beijing 100075,China高影响力机构 出　　处：《Journal of Modern Power Systems and Clean Energy》索引2024年第12卷第1期,共13页高影响力期刊 基　　金：supported by the National Key Research and Development Program of China(No.2019YFE0118400). 摘　　要：The increasing integration of distributed household photovoltaics(PVs)and electric vehicles(EVs)may further ag gravate voltage violations and unbalance of low-voltage distribu tion networks(LVDNs).DC distribution networks can increase the accommodation of PVs and EVs and mitigate mutilple pow er quality problems by the flexible power regulation capability of voltage source converters.This paper proposes schemes to es tablish hybrid AC/DC LVDNs considering the conversion of the existing three-phase four-wire low-voltage AC systems to DC op eration.The characteristics and DC conversion constraints of typical LVDNs are analyzed.In addition,converter configura tions for typical LVDNs are proposed based on the three-phase four-wire characteristics and quantitative analysis of various DC configurations.Moreover,an optimal planning method of hybrid AC/DC LVDNs is proposed,which is modeled as a bi-level programming model considering the annual investments and three-phase unbalance.Simulations are conducted to verify the effectiveness of the proposed optimal planning method.Sim ulation results show that the proposed optimal planning method can increase the integration of PVs while simultaneously reduc ing issues related to voltage violation and unbalance. 关 键 词：Optimal planning low-voltage distribution net work three-phase unbalance DC conversion
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