引用本文:查丛梅,王长江,魏云冰,等.一种基于EMD的谐振接地系统选线新方法[J].电力系统保护与控制,2014,42(14):100-104.
ZHA Cong-mei,WANG Chang-jiang,WEI Yun-bing,et al.A new method of the resonant grounding system fault line detection based on EMD[J].Power System Protection and Control,2014,42(14):100-104
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一种基于EMD的谐振接地系统选线新方法
查丛梅1, 王长江2, 魏云冰2, 李涛3, 路光辉4
1.中原工学院电子信息学院，河南 郑州 450007;2.郑州轻工业学院电气信息工程学院，河南 郑州 450002;3.南阳市供电公司，河南 南阳 473000;4.许继电气股份有限公司，河南 许昌 461000
摘要:
针对谐波接地系统故障线路零序导纳特征不突出这一问题，提出了一种基于EMD的谐振接地系统选线新方法。该方法对各条线路的零序导纳进行EMD分解，提取出特征分量，通过比较故障线路和非故障线路特征分量的符号进行选线。大量仿真表明，该方法不受接地电阻和初始故障角的影响，能准确地选出故障线路。
关键词:  谐振接地系统  零序导纳  EMD  特征分量  故障选线
DOI：10.7667/j.issn.1674-3415.2014.14.016
分类号:
基金项目:国家自然科学基金项目(61305080)
A new method of the resonant grounding system fault line detection based on EMD
ZHA Cong-mei1, WANG Chang-jiang2, WEI Yun-bing2, LI Tao3, LU Guang-hui4
1.School of Electric and Information, Zhongyuan University of Technology, Zhengzhou 450007, China;2.School of Electrical and Information Engineering, Zhengzhou University of Light Industry, Zhengzhou 450002, China;3.Nanyang Power Supply Company, Nanyang 473000, China;4.XJ Electric Co., Ltd, Xuchang 461000, China
Abstract:
To solve this problem that harmonic grounding system fault line zero sequence admittance levy does not highlight, this paper proposes a new resonant grounding line selection method based on EMD. In this method, each line zero sequence admittance is decomposed with EMD, characteristic component is extracted, and the fault line is selected by comparing the characteristic component symbols of the fault line and non-fault lines. Extensive simulations show that this method is not impacted by the ground fault resistance and the initial angle, and can accurately select the fault line.
Key words:  resonant grounding system  zero sequence admittance  EMD  characteristic component  fault line
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