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.
作者
王丰华
杨毅
何苗忠
杜胜磊
刘石
杨贤
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)
出处
《电机与控制学报》
EI
CSCD
北大核心
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)
关键词
变压器
绕组
振动
固有频率
振型
power transformer
winding
vibration
inherent frequency
vibration pattern
