[1]赵永彬,陆于平.基于磁通和电流不对称椭圆模型的变压器励磁涌流判别新算法[J].东南大学学报(自然科学版),2007,37(6):1001-1007.[doi:10.3969/j.issn.1001-0505.2007.06.012]
 Zhao Yongbin,Lu Yuping.New algorithm for judging transformer inrush current based on asymmetry elliptical model of flux and current[J].Journal of Southeast University (Natural Science Edition),2007,37(6):1001-1007.[doi:10.3969/j.issn.1001-0505.2007.06.012]
点击复制

基于磁通和电流不对称椭圆模型的变压器励磁涌流判别新算法()
分享到:

《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
37
期数:
2007年第6期
页码:
1001-1007
栏目:
电气工程
出版日期:
2007-11-20

文章信息/Info

Title:
New algorithm for judging transformer inrush current based on asymmetry elliptical model of flux and current
作者:
赵永彬 陆于平
东南大学电气工程学院, 南京 210096
Author(s):
Zhao Yongbin Lu Yuping
School of Electrical Engineering, Southeast University, Nanjing 210096, China
关键词:
变压器 励磁涌流 椭圆模型 中心点偏移度
Keywords:
transformer inrush current elliptical model center offset
分类号:
TM93
DOI:
10.3969/j.issn.1001-0505.2007.06.012
摘要:
依据变压器空投时磁通和电流的严重不对称变化和正常运行或内部故障时磁滞影响使磁通和电流成偏移的近似椭圆对称变化,对磁通和电流做适当的变换处理.在一定数据窗内定义一个反应准椭圆中心的偏移度,并连续取半个周期准椭圆中心的偏移度平均值来反应磁通和电流是否对称变化.变压器空投时偏移度较大; 内部故障时偏移度小; 空投略微严重的内部故障时偏移度由大到小变化.偏移度大小作为区分励磁涌流和故障电流的判据,简单可靠,具有较高灵敏度.通过试验和仿真证明此种方法可以有效地区分励磁涌流和故障电流,具有较高的实用性.
Abstract:
When the transformer is switched on and energized, the transformer’s flux and current will change asymmetrically. When the transformer is under normal or internal windings fault condition, with the influence of hysteresis, the flux and current will approximately correspond to elliptical symmetry change. The flux and current can be transformed properly to the parameters to reflect the symmetry level of the flux and current. A center offset is defined to describe the offset of elliptical center of flux and current in one setting data window. Whether the change of flux and current is symmetric is determined by the half cycle average value of the elliptical center offset. The offset will increase significantly when the transformer is switched on and decrease while the internal winding fault occurs, which makes the offset the criterion to distinguish inrush and fault currents. It can be concluded from the simulation results that offset is a simple, reliable and practical criterion to distinguish inrush and fault currents.

参考文献/References:

[1] 韩正庆,高仕斌,李群湛.基于变压器模型的新型变压器保护原理和判据[J].电网技术,2005,29(5):67-71.
  Han Zhengqing,Gao Shibin,Li Quanzan.A novel transformer model based protective principle for transformer and its criteria [J]. Power System Technology,2005,29(5):67-71.(in Chinese)
[2] 郝治国,张保会,褚云龙,等.基于等值回路平衡方程的变压器保护原理[J].中国电机工程学报,2006,26(10):67-72.
  Hao Zhiguo,Zhang Baohui,Chu Yunlong,et al.Study on transformer protection principle based on equivalent circuit equilibrium equation [J].Proceedings of CSEE,2006,26(10):67-72.(in Chinese)
[3] Keizo Inagaki,Masaru Higaki,Yoshiaki Matsui,et al.Digital protection method for power transformer based on an equivalent circuit composed of inverse inductance [J]. IEEE Trans on Power Delivery,1998,3(4):1501-1510.
[4] 潘荣贞,郁惟镛,田寿龙.基于波形记忆和模糊极小-极大神经网络的变压器励磁涌流和内部短路的鉴别[J].电网技术,2002,26(5):4-9.
  Pan Rongzhen,Yu Weiyong,Tian Shoulong.Distinguish transformer magnetizing inrush from its internal faults based on wave shape remembrance and fuzzy minimum—maximum neural network [J].Power System Technology,2002,26(5):4-9.(in Chinese)
[5] 李贵存,刘万顺,贾清泉,等.一种利用小波原理防止变压器差动保护误动的新算法[J].电网技术,2001,25(7):48-52.
  Li Guicun,Liu Wanshun,Jia Qingquan,et al.A new algorithm to prevent misoperation of transformer differential protection based on principle of wavelet transform [J]. Power System Technology,2001,25(7):48-52.(in Chinese)
[6] 张雪松,何奔腾.基于误差估计的变压器励磁涌流识别原理[J].中国电机工程学报,2005,25(3):94-99.
  Zhang Xuesong,He Benteng.A new method to identify inrush current based on error estimation [J]. Proceedings of CSEE,2005,25(3):94-99.(in Chinese)
[7] 马静,王增平,徐岩.用相关函数原理识别变压器励磁涌流和故障电流的新方法[J].电网技术,2005,29(6):78-81.
  Ma Jing,Wang Zengping,Xu Yan.Research on novel transformer protection based on the ratio of voltage and fluxional differential current [J].Power System Technology,2005,29(6):78-81.(in Chinese)
[8] Lin Xiangning,Liu Pei,Malik O P.Studies for identification of the inrush based on improved correlation algorithm [J]. IEEE Trans on Power Delivery,2002,17(4):901-907.
[9] 陈德树.计算机继电保护原理与技术[M].北京:水利电力出版社,1992.
[10] 王微俭.电气主设备继电保护原理与运行[M].北京:中国电力出版社,1996.
[11] 李富强,刘秀成,李东霞,等.基于虚拟磁通与差动电流特性识别变压器励磁涌流[J].电力系统自动化,2004,28(23):45-49.
  Li Fuqiang,Liu Xiucheng,Li Dongxia,et al.Identification of transformer magnetic inrush current based on virtual flux and differential current characteristics [J].Automation of Electric Power Systems,2004,28(23):45-49.(in Chinese)
[12] Wang H,Butler K L.Finite element analysis of internal winding faults in distribution transformers [J].IEEE Trans on Power Delivery,2001,16(13):422-428.

相似文献/References:

[1]郭健,林鹤云,徐子宏,等.变压器阶梯接缝铁心的损耗计算[J].东南大学学报(自然科学版),2007,37(1):60.[doi:10.3969/j.issn.1001-0505.2007.01.014]
 Guo Jian,Lin Heyun,Xu Zihong,et al.Computation of losses in step-lap laminated transformer cores[J].Journal of Southeast University (Natural Science Edition),2007,37(6):60.[doi:10.3969/j.issn.1001-0505.2007.01.014]
[2]刘卫东,兰之达,刘中岳,等.电力变压器的非线性模型[J].东南大学学报(自然科学版),1993,23(2):82.[doi:10.3969/j.issn.1001-0505.1993.02.013]
 Nonlinear Models for Power Transformers[J].Journal of Southeast University (Natural Science Edition),1993,23(6):82.[doi:10.3969/j.issn.1001-0505.1993.02.013]
[3]刘卫东,兰之达,刘中岳,等.电力系统中采用全县形变压器所引起的谐波[J].东南大学学报(自然科学版),1993,23(2):90.[doi:10.3969/j.issn.1001-0505.1993.02.014]
 Harmonics Caused by Installation of All-Star Connected Transformers in Power System[J].Journal of Southeast University (Natural Science Edition),1993,23(6):90.[doi:10.3969/j.issn.1001-0505.1993.02.014]
[4]严一士.平衡繞組在变压器中的作用和理論[J].东南大学学报(自然科学版),1963,5(2):195.[doi:10.3969/j.issn.1001-0505.1963.02.012]
[5]严一士.原副绕组在不同铁芯的漏抗问题[J].东南大学学报(自然科学版),1958,4(1):16.[doi:10.3969/j.issn.1001-0505.1958.01.002]
 [J].Journal of Southeast University (Natural Science Edition),1958,4(6):16.[doi:10.3969/j.issn.1001-0505.1958.01.002]

备注/Memo

备注/Memo:
基金项目: 国家自然科学基金资助项目(50577006).
作者简介: 赵永彬(1971—),男,博士生; 陆于平(联系人),男,博士,教授,博士生导师,luyuping@seu.edu.cn.
更新日期/Last Update: 2007-11-20