应用有限元法分析变压器绕组固有振动特性  

Inherent vibration features of power transformer winding by finite element method

作　　者：王丰华[1] 杨毅[2] 何苗忠 杜胜磊 刘石[2] 杨贤[2] WANG Feng-hua;YANG Yi;HE Miao-zhong;DU Sheng-lei;LIU Shi;YANG Xian(Key Laboratory of Control of Power Transmission and Conversion,Ministry of Education,Shanghai Jiao Tong University,Shanghai 200240,China;Guangdong Electric Power Company Electric Power Research Institute,Guangzhou 510080,China)

机构地区：[1]上海交通大学电力传输与功率变换控制教育部重点实验室,上海200240 [2]广东电网公司电力科学研究院,广州广东510080

出　　处：《电机与控制学报》2018年第4期51-57,共7页Electric Machines and Control

基　　金：国家自然科学基金(51207090)

摘　　要：为进一步理解和掌握变压器绕组的固有振动特性,建立变压器绕组的三维有限元模型,给出变压器绕组正常与预紧力改变时的固有频率及其对应的振型。同时以某10 kV实体变压器绕组为试验对象,对其模态特性进行了测试分析。计算得到的变压器绕组固有振动特性与测试结果吻合良好,说明所建立的变压器绕组有限元模型的正确性。此外,变压器绕组正常状态时,前四阶固有频率对应的振型呈现不同的振动形态,且对称性较好。绕组预紧力改变时,变压器绕组各阶固有频率均随预紧力增大而增大,但增幅各异,高阶固有频率对预紧力的变化更为敏感。To further understand and master the inherent vibration features of transformer winding,the 3-D finite element model of transformer winding is built to calculate the natural frequency and the corresponding vibration pattern.Meanwhile,the model experiment of some real 10kV power transformer was made on the transformer winding.The results of simulation and experiment match well,which verifies the correctness of the simulation model.It is shown that the vibration patterns corresponding vibration patterns were in different shapes and good symmetry when the winding was under normal condition.When the precompression force of transformer winding was changed,the first four-order natural frequencies were increased with the increasing of precompression in different amplitudes.The high order natural frequency was more sensitive to the variations of precompression.

关 键 词：变压器 绕组 振动 固有频率 振型 

分 类 号：TM401.1[电气工程—电器]