电气技术  2019, Vol. 20 Issue (6): 21-24    DOI:
研究与开发 |
基于相角判别法的主变零差保护回路自校验装置研究
陆明1, 杨沛豪2, 兀鹏越2, 薛磊2, 郭霞2
1. 中国南方电网电力调度控制中心,广州 510623;
2. 西安热工研究院有限公司,西安 710054
Self calibration analysis of main transformer zero difference protection loop based on phase angle discriminant device
Lu Ming1, Yang Peihao2, Wu Pengyue2, Xue Lei2, Guo Xia2
1. Power Dispatching and Control Center of China Southern Power Grid, Guangzhou 510623;
2. Xi'an Thermal Power Research Institute, Xi'an 710054
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摘要 为了解决电力系统中主变零序差动保护在主变投运和运行中的回路校验问题,本文提出一种基于相角判别法的主变零序差动保护回路极性判别方法,该方法可判断零序差动保护回路极性是否正确。在此方法基础上,本文开发出一种主变零序差动保护回路自校验装置,该自校验装置可实现及时、准确、自动地校验零序差动保护回路,提高零序差动保护运行的可靠性,最后通过在动模机组模拟仿真和在现场实验验证了本文所提方法的可靠性和正确性。
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关键词 零序差动相角判别法自校验装置励磁涌流    
Abstract:In order to solve the circuit checking problem of zero-sequence differential protection of main transformer in power system, a method based on phase-angle discriminant is proposed to judge the polarity of zero-sequence differential protection circuit of main transformer. On the basis of this method, a self-calibration device for zero-sequence differential protection circuit of main transformer is developed. The self-calibration device can realize timely, accurate and automatic calibration of zero-sequence differential protection circuit and improve the reliability of zero-sequence differential protection operation. Finally, the proposed method is verified by dynamic simulation and field experiment. The self-calibration device can calibrate the zero-sequence differential protection circuit timely, accurately and automatically, and improve the reliability of the zero-sequence differential protection operation. Finally, the reliability and correctness of the proposed method are verified by the simulation of the dynamic simulation unit and the field experiment.
Key wordszero sequence differential    phase distinguishing method    self checking device    excitation inrush fundamental wave   
收稿日期: 2018-10-19      出版日期: 2019-06-17
作者简介: 陆 明(1973-),男,广西梧州人,本科,高级工程师,从事电力系统继电保护运行及管理工作。
引用本文:   
陆明, 杨沛豪, 兀鹏越, 薛磊, 郭霞. 基于相角判别法的主变零差保护回路自校验装置研究[J]. 电气技术, 2019, 20(6): 21-24. Lu Ming, Yang Peihao, Wu Pengyue, Xue Lei, Guo Xia. Self calibration analysis of main transformer zero difference protection loop based on phase angle discriminant device. Electrical Engineering, 2019, 20(6): 21-24.
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https://dqjs.cesmedia.cn/CN/Y2019/V20/I6/21