基于相似理论的电力变压器缩比关系研究  

Research on scaling relationship of power transformer based on similarity theory

作　　者：汪涛[1] 谢齐家[1] 张亚东[2] 杜志叶[2] 阮江军[2] 谭丹[2] 朱琳[2] 

机构地区：[1]国网湖北省电力公司电力科学研究院,湖北武汉430077 [2]武汉大学电气工程学院,湖北武汉430072

出　　处：《电工电能新技术》2015年第6期76-80,共5页Advanced Technology of Electrical Engineering and Energy

摘　　要：相似理论是试验分析中被广泛采用的应用科学方法,以相似理论为基础确立缩比关系有助于从模型测试结论推导至实际模型结论,采用缩比模型试验用于变压器的设计或者特性研究具有良好的经济意义和价值。本文首先对相似理论的基本定律进行了介绍,然后以电力变压器为研究对象,以尺寸和电流幅值作为基本缩比因子推导得到变压器的缩比关系式,基于Ansoft有限元仿真软件,建立了180匝的变压器原模型和缩比模型,最后进行了电磁场数值仿真比较。研究结果表明,原模型和缩比模型的磁场云图分布规律完全相同,对应时刻及对应位置上的磁感应强度幅值满足缩比关系,验证了本文推导的缩比关系。Similarity theory is a widely used application scientific method in experimental analysis. The scaling re- lationship based on similarity theory is helpful to extrapolate the result from small-scale tests to large-scale experi- ments. Firstly, the paper introduces the fundamental law of the similarity theory. Secondly, the scaling relationship of power transformer under normal condition is derived. The dimension and magnitude of current are chosen as the basic factor. At last, based on Ansoft simulation code, an original transformer of 180 turns and a scale model are simulated. The electromagnetic field simulation results show that the magnetic field distributions of the two models are the same. The magnetic strengths on the corresponding place of the two models satisfy the scaling relationship. The result verifies the scaling relationship we derived. The scale model is helpful to design transformers and to in- vestigate the power frequency characteristic which makes remarkable economic significance and value.

关 键 词：变压器 相似理论 缩比关系 

分 类 号：TM406[电气工程—电器]