基于简支绕组横梁算法的变压器绕组形变矢量化监测模型  

Vectorization Monitoring Model of Transformer Winding Deformation Based on Simply Supported Winding Beam Algorithm

作　　者：范晓舟[1] 袁洁平 薛峰 王湘女 律方成[1] 耿江海[1] Fan Xiaozhou;Yuan Jieping;Xue Feng;Wang Xiangnü;LüFancheng;GengJianghai(Hebei Provincial Key Laboratory of Power Transmission Equipment Security Denfense,North China Electric Power University,Baoding,071003,China;Guangdong Power Grid Limited Liability Company Dongguan Power Supply Bureau,Dongguan,523000,China)

机构地区：[1]华北电力大学河北省输变电设备安全防御重点实验室,保定071003 [2]广东电网有限责任公司东莞供电局,东莞523000

出　　处：《电工技术学报》2025年第5期1639-1651,共13页Transactions of China Electrotechnical Society

基　　金：中央高校基本科研业务费专项资金(2023MS106);南方电网公司科技项目(031900KK52220012)资助。

摘　　要：变压器绕组状态监测非常重要,为精确地监测变压器绕组变形方向与变形程度,该文结合简支横梁原理与布里渊光时域分析技术,提出了针对变压器绕组的形变矢量化监测算法。基于材料力学理论推导,建立了布里渊频移量与绕组形变轴向、径向分量关系式,利用布里渊光时域分析技术建立了变压器绕组形变矢量化监测模型。通过对光纤复合导线和内置光纤的35 kV绕组施加轴向形变和径向形变,借助布里渊光时域反射技术完成了形变监测,验证了监测模型的准确性。结果表明,复合导线实验中轴向形变测量平均误差为6.60%,径向形变测量平均误差为5.88%;内置光纤的35 kV绕组实验中轴向形变平均误差为9.63%,径向形变平均误差为5.18%。实验结果验证了绕组形变矢量化监测模型可实现绕组形变方向和形变程度的监测,有效地提高绕组形变程度的监测精度。Winding deformation is one of the important causes of transformer failure and is the focus of transformer condition monitoring.To achieve accurate monitoring of the direction and degree of transformer winding deformation,this paper combines the principle of a simple beam with the Brillouin optical time-domain analysis technique and proposes a vectorized monitoring algorithm for transformer winding deformation.Firstly,based on the theoretical derivation of material mechanics,the Brillouin frequency shift of axial deformation is proportional to the distance from the optical fiber to the neutral axis,and the Brillouin frequency shift of radial deformation is equal to the law,and the relationship between the Brillouin frequency shift and its axial and radial components is established,and the Brillouin optical time-domain analysis is combined to establish a vectorized monitoring model of the deformation of transformer windings that can be used in actual operation.The vectorized fiber optic sensors are designed,and the fiber optic composite conductor model is built on a single conductor.5 sets of axial and radial deformations of different degrees are applied by a high-precision tensile machine,and the deformation monitoring is completed with the help of the Brillouin optical time-domain reflection technology,and the result verifies that the conductor is subjected to the bulging and upward deviation as the positive strain,and the depression and downward deviation as the negative strain,and the coordinate system of the direction of deformation is constructed,and the deformation direction determination can be achieved by the demodulation result.The deformation direction can be determined by the demodulation results,calculating the experimental error of the conductor axial deformation monitoring error average value of 6.60%,radial deformation monitoring error average value of 5.88%,the analysis of the error caused by the high-precision press slight jitter and uneven application of the epoxy resin adhesive,but demodulation

关 键 词：绕组形变 矢量化监测 光纤传感 简支绕组横梁 

分 类 号：TM41[电气工程—电器]