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文章摘要
基于SOGI的变压器短路阻抗参数在线辨识方法
On-line Identification Algorithm for Transformer Short-circuit Impedance Parameters Based on SOGI
Received:January 29, 2018
Revised:January 29, 2018
DOI：
中文关键词
:
变压器
绕组变形
在线监测
暂态稳态模型
二
英文关键词
:
Transformer
inding deformation
On-line monitoring
Transient steady-state model
Second-order generalized integrator
Least squares
基金项目
:
Author Name
Affiliation
E-mail
lvzhengyang
*
China University of Petroleum (East China)
m15763944586_1@163.com
renxuhu
China University of Petroleum (East China)
m15763944586_1@163.com
lidewen
China University of Petroleum (East China)
m15763944586_1@163.com
ZHAO Rui
China University of Petroleum (East China)
m15763944586_1@163.com
LU Xiuping
China University of Petroleum (East China)
m15763944586_1@163.com
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中文摘要
:
电力变压器在运行过程中发生绕组变形导致的内部故障,已经严重危害电网安全。为了及时发现变压器绕组变形故障,本文以变压器回路方程为基本模型,提出了一种变压器绕组参数在线辨识方法。通过分析变压器暂态和稳态两种运行状态,建立不同的参数辨识模型,推导了不同状态下变压器绕组参数辨识方程。利用二阶广义积分器提取变压器原、副边电压电流信号基波和各次谐波分量,判断变压器的运行状态,通过最小二乘算法进行实时辨识,实现对变压器绕组变形的监测。建立了变压器绕组变形的仿真模型,通过仿真模型及动模试验验证了变压器参数辨识在线监测系统的可行性。
英文摘要
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