基于选相投旁通对的LCC-HVDC系统逆变侧换流变故障性涌流主动抑制策略

当高压直流输电系统换流变阀侧发生单相接地故障,由于换流阀的单向导通性,阀侧故障电流中含有较大的直流分量,流入换流变可能导致换流变饱和并产生"故障性涌流".与传统三大涌流不同,故障性涌流由阀侧单相接地故障诱发并受直流控制与保护系统的影响.计及直流控保系统的影响,分析了逆变侧换流变发生阀侧单相接地故障时,换流变故障性涌流的产生机理及其对换流变差动保护的影响.针对换流变保护区内阀侧单相接地故障场景下,故障性涌流可能导致差动保护误闭锁的问题,提出了一种基于选相投旁通对的故障性涌流主动抑制策略,可以从根本上避免差动保护误闭锁问题.基于PSCAD/EMTDC的仿真实验验证了所提方案的有...

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Published in电力系统保护与控制 Vol. 51; no. 1; pp. 158 - 164
Main Authors 罗美玲, 郑涛, 潘志远, 刘校销, 于晓军, 吴建云
Format Journal Article
LanguageChinese
Published 国网宁夏电力有限公司,宁夏银川 750001%新能源电力系统国家重点实验室(华北电力大学),北京 102206%新能源电力系统国家重点实验室(华北电力大学),北京 102206 2023
鲁汶大学,比利时 Leuven 3001
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Online AccessGet full text
ISSN1674-3415
DOI10.19783/j.cnki.pspc.220255

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Abstract 当高压直流输电系统换流变阀侧发生单相接地故障,由于换流阀的单向导通性,阀侧故障电流中含有较大的直流分量,流入换流变可能导致换流变饱和并产生"故障性涌流".与传统三大涌流不同,故障性涌流由阀侧单相接地故障诱发并受直流控制与保护系统的影响.计及直流控保系统的影响,分析了逆变侧换流变发生阀侧单相接地故障时,换流变故障性涌流的产生机理及其对换流变差动保护的影响.针对换流变保护区内阀侧单相接地故障场景下,故障性涌流可能导致差动保护误闭锁的问题,提出了一种基于选相投旁通对的故障性涌流主动抑制策略,可以从根本上避免差动保护误闭锁问题.基于PSCAD/EMTDC的仿真实验验证了所提方案的有效性.
AbstractList 当高压直流输电系统换流变阀侧发生单相接地故障,由于换流阀的单向导通性,阀侧故障电流中含有较大的直流分量,流入换流变可能导致换流变饱和并产生"故障性涌流".与传统三大涌流不同,故障性涌流由阀侧单相接地故障诱发并受直流控制与保护系统的影响.计及直流控保系统的影响,分析了逆变侧换流变发生阀侧单相接地故障时,换流变故障性涌流的产生机理及其对换流变差动保护的影响.针对换流变保护区内阀侧单相接地故障场景下,故障性涌流可能导致差动保护误闭锁的问题,提出了一种基于选相投旁通对的故障性涌流主动抑制策略,可以从根本上避免差动保护误闭锁问题.基于PSCAD/EMTDC的仿真实验验证了所提方案的有效性.
Author 潘志远
郑涛
吴建云
于晓军
罗美玲
刘校销
AuthorAffiliation 国网宁夏电力有限公司,宁夏银川 750001%新能源电力系统国家重点实验室(华北电力大学),北京 102206%新能源电力系统国家重点实验室(华北电力大学),北京 102206;鲁汶大学,比利时 Leuven 3001
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Author_FL ZHENG Tao
LUO Meiling
LIU Xiaoxiao
YU Xiaojun
WU Jianyun
PAN Zhiyuan
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Keywords 高压直流输电
差动保护
故障性涌流
换流变压器
旁通对
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Publisher 国网宁夏电力有限公司,宁夏银川 750001%新能源电力系统国家重点实验室(华北电力大学),北京 102206%新能源电力系统国家重点实验室(华北电力大学),北京 102206
鲁汶大学,比利时 Leuven 3001
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Title 基于选相投旁通对的LCC-HVDC系统逆变侧换流变故障性涌流主动抑制策略
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