基于触发角偏差补偿的连续换相失败抑制措施
TM721.1; 逆变侧交流系统发生不对称故障后容易导致连续换相失败,威胁电网的安全稳定运行.针对这一问题,基于不对称故障后直流控制系统的响应规律,根据直流系统稳态运行曲线将故障及恢复过程分为2个阶段,发现在阶段2即故障稳定恢复阶段,存在换相面积需求量逐渐增加而换相面积最大提供量逐渐减小的趋势,并且在此过程中触发角指令值与触发角实际值还存在偏差,触发角偏差将进一步削减换相面积最大提供量,是引发连续换相失败的重要原因.基于此,分析了触发角偏差的来源以及触发角偏差对控制系统的影响,提出一种基于触发角偏差补偿的连续换相失败抑制措施,并在PSCAD/EMTDC中基于CIGRE HVDC标准模型进行仿真...
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Published in | 电力自动化设备 Vol. 43; no. 3; pp. 210 - 216 |
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Main Authors | , , , , , |
Format | Journal Article |
Language | Chinese |
Published |
华南理工大学 电力学院,广东 广州 510641
01.03.2023
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Subjects | |
Online Access | Get full text |
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Abstract | TM721.1; 逆变侧交流系统发生不对称故障后容易导致连续换相失败,威胁电网的安全稳定运行.针对这一问题,基于不对称故障后直流控制系统的响应规律,根据直流系统稳态运行曲线将故障及恢复过程分为2个阶段,发现在阶段2即故障稳定恢复阶段,存在换相面积需求量逐渐增加而换相面积最大提供量逐渐减小的趋势,并且在此过程中触发角指令值与触发角实际值还存在偏差,触发角偏差将进一步削减换相面积最大提供量,是引发连续换相失败的重要原因.基于此,分析了触发角偏差的来源以及触发角偏差对控制系统的影响,提出一种基于触发角偏差补偿的连续换相失败抑制措施,并在PSCAD/EMTDC中基于CIGRE HVDC标准模型进行仿真验证.仿真结果表明,所提措施能够有效抑制连续换相失败. |
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AbstractList | TM721.1; 逆变侧交流系统发生不对称故障后容易导致连续换相失败,威胁电网的安全稳定运行.针对这一问题,基于不对称故障后直流控制系统的响应规律,根据直流系统稳态运行曲线将故障及恢复过程分为2个阶段,发现在阶段2即故障稳定恢复阶段,存在换相面积需求量逐渐增加而换相面积最大提供量逐渐减小的趋势,并且在此过程中触发角指令值与触发角实际值还存在偏差,触发角偏差将进一步削减换相面积最大提供量,是引发连续换相失败的重要原因.基于此,分析了触发角偏差的来源以及触发角偏差对控制系统的影响,提出一种基于触发角偏差补偿的连续换相失败抑制措施,并在PSCAD/EMTDC中基于CIGRE HVDC标准模型进行仿真验证.仿真结果表明,所提措施能够有效抑制连续换相失败. |
Author | 汪娟娟 蔡泽祥 王玉麟 李晓华 谭展鹏 赵君 |
AuthorAffiliation | 华南理工大学 电力学院,广东 广州 510641 |
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Author_FL | ZHAO Jun LI Xiaohua CAI Zexiang WANG Yulin TAN Zhanpeng WANG Juanjuan |
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Keywords | 基于电网电压换相的高压直流输电 触发角偏差 连续换相失败 负序分量 不对称故障 |
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Title | 基于触发角偏差补偿的连续换相失败抑制措施 |
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