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 |
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Main Authors | , , , , , |
Format | Journal Article |
Language | Chinese |
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 |
Subjects | |
Online Access | Get full text |
ISSN | 1674-3415 |
DOI | 10.19783/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. |
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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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DocumentTitle_FL | Faulty-phase bypass-pair-based mitigation strategy for fault-induced inrush currents in LCC-HVDC inverter-side converter transformers |
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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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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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