基于参数辨识的变压器绕组变形在线监测方法
发布时间：2018-10-08 12:21
【摘要】：变压器绕组变形导致的内部匝间故障已经上升至事故率的首位,对电网安全性危害极大。为此,提出一种变压器绕组变形在线监测工程方法。利用以傅里叶为理论基础的动态向量模型,在保持高精度的条件下简化变压器电磁暂态模型,并讨论不同运行状态下模型参数辨识解的个数。当变压器空载合闸时辨识出绕组电阻参数,在变压器稳态运行时利用已辨识出的电阻参数修改参数辨识模型,并辨识漏感参数。利用绕组变形与漏电感参数之间的关系,实现对变压器绕组变形在监测。建立了变压器绕组变形的仿真模型,使用有限元方法计算变压器绕组变形的短路电感值,验证了变压器绕组在线监测方法的有效性。
[Abstract]:The inter-turn fault caused by transformer winding deformation has risen to the top of the accident rate, which is harmful to the power network safety. In this paper, an on-line monitoring method for transformer winding deformation is proposed. In this paper, the dynamic vector model based on Fourier theory is used to simplify the electromagnetic transient model of transformer under the condition of high accuracy, and the number of identification solutions of the model parameters in different operation states is discussed. The windings resistance parameters are identified when the transformer is closed without load, and the identified resistance parameters are used to modify the identification model during the steady operation of the transformer, and the leakage inductance parameters are identified. Based on the relationship between winding deformation and leakage inductance parameters, transformer winding deformation is monitored. The simulation model of transformer winding deformation is established, and the short circuit inductance of transformer winding deformation is calculated by finite element method, which verifies the effectiveness of on-line monitoring method of transformer winding.
【作者单位】： 上海电力学院电气工程学院;重庆大学电气工程学院;
【基金】：重庆大学输配电装备及系统安全与新技术国家重点实验室访问学者基金项目支持(2007DA10512712407)
【分类号】：TM403.2
[Abstract]:The inter-turn fault caused by transformer winding deformation has risen to the top of the accident rate, which is harmful to the power network safety. In this paper, an on-line monitoring method for transformer winding deformation is proposed. In this paper, the dynamic vector model based on Fourier theory is used to simplify the electromagnetic transient model of transformer under the condition of high accuracy, and the number of identification solutions of the model parameters in different operation states is discussed. The windings resistance parameters are identified when the transformer is closed without load, and the identified resistance parameters are used to modify the identification model during the steady operation of the transformer, and the leakage inductance parameters are identified. Based on the relationship between winding deformation and leakage inductance parameters, transformer winding deformation is monitored. The simulation model of transformer winding deformation is established, and the short circuit inductance of transformer winding deformation is calculated by finite element method, which verifies the effectiveness of on-line monitoring method of transformer winding.
【作者单位】： 上海电力学院电气工程学院;重庆大学电气工程学院;
【基金】：重庆大学输配电装备及系统安全与新技术国家重点实验室访问学者基金项目支持(2007DA10512712407)
【分类号】：TM403.2
【参考文献】
中国期刊全文数据库 前10条
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