基于采样序列整形的配电网线路保护防励磁涌流误动策略
针对配网线路中配变空载合闸导致励磁涌流从而引起上游线路保护误动的问题,提出了一种基于采样序列整形的配电网线路保护防励磁涌流误动策略.当线路电流同时满足快速启动和二次谐波含量低判据时,进入电流序列整形程序.首先,根据二次谐波有效值的稳定区段将电流信号分割为正弦区段和畸变区段,并利用稳定区段的长度设置结束判据.然后,通过确定自适应窗长和标准正弦曲线对正弦区段进行相似度计算,得到原始正弦区段的幅值和相位参数,从而对畸变区段完成整形.最后,将修复后不带励磁涌流的电流信号送至线路保护进行判断.所提策略能够有效应对混叠在负荷电流和故障电流中的励磁涌流,并通过仿真分析验证了所提策略的有效性和可靠性....
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| Published in | 电力系统保护与控制 Vol. 51; no. 21; pp. 136 - 145 |
|---|---|
| Main Authors | , , , , , |
| Format | Journal Article |
| Language | Chinese |
| Published |
梯级水电站运行与控制湖北省重点实验室(三峡大学),湖北 宜昌 443002%国网北京市电力公司电力科学研究院,北京 100075%国网湖北省电力公司荆门供电公司,湖北 荆门 448001
01.11.2023
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| Subjects | |
| Online Access | Get full text |
| ISSN | 1674-3415 |
| DOI | 10.19783/j.cnki.pspc.230184 |
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| Abstract | 针对配网线路中配变空载合闸导致励磁涌流从而引起上游线路保护误动的问题,提出了一种基于采样序列整形的配电网线路保护防励磁涌流误动策略.当线路电流同时满足快速启动和二次谐波含量低判据时,进入电流序列整形程序.首先,根据二次谐波有效值的稳定区段将电流信号分割为正弦区段和畸变区段,并利用稳定区段的长度设置结束判据.然后,通过确定自适应窗长和标准正弦曲线对正弦区段进行相似度计算,得到原始正弦区段的幅值和相位参数,从而对畸变区段完成整形.最后,将修复后不带励磁涌流的电流信号送至线路保护进行判断.所提策略能够有效应对混叠在负荷电流和故障电流中的励磁涌流,并通过仿真分析验证了所提策略的有效性和可靠性. |
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| AbstractList | 针对配网线路中配变空载合闸导致励磁涌流从而引起上游线路保护误动的问题,提出了一种基于采样序列整形的配电网线路保护防励磁涌流误动策略.当线路电流同时满足快速启动和二次谐波含量低判据时,进入电流序列整形程序.首先,根据二次谐波有效值的稳定区段将电流信号分割为正弦区段和畸变区段,并利用稳定区段的长度设置结束判据.然后,通过确定自适应窗长和标准正弦曲线对正弦区段进行相似度计算,得到原始正弦区段的幅值和相位参数,从而对畸变区段完成整形.最后,将修复后不带励磁涌流的电流信号送至线路保护进行判断.所提策略能够有效应对混叠在负荷电流和故障电流中的励磁涌流,并通过仿真分析验证了所提策略的有效性和可靠性. |
| Author | 胡聪 李振兴 魏业文 朱益 陈艳霞 皮志勇 |
| AuthorAffiliation | 梯级水电站运行与控制湖北省重点实验室(三峡大学),湖北 宜昌 443002%国网北京市电力公司电力科学研究院,北京 100075%国网湖北省电力公司荆门供电公司,湖北 荆门 448001 |
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| Author_FL | ZHU Yi LI Zhenxing WEI Yewen CHEN Yanxia PI Zhiyong HU Cong |
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| Keywords | second harmonic 皮尔逊相关系数 distribution network 配电网 sequence shaping 序列整形 励磁涌流 excitation inrush current 二次谐波 Pearson correlation coefficient |
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| Title | 基于采样序列整形的配电网线路保护防励磁涌流误动策略 |
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