一种新型阻抗匹配平衡变压器及模型试验  

A novel impedance matching balance transformer and its model tests

作　　者：孙盼[1] 赵镜红[1] 吴旭升[1] 

机构地区：[1]海军工程大学电气工程学院,武汉430033

出　　处：《海军工程大学学报》2016年第1期41-47,共7页Journal of Naval University of Engineering

基　　金：国家自然科学基金资助项目(51177171)

摘　　要：为了解决三相电力系统带单相或两相负载引起的不平衡问题,提出了一种新型阻抗匹配平衡变压器。首先,阐述了该变压器的基本原理,建立了基本方程组,并推导出原副边绕组电流之间关系,得出了平衡条件和两相负载的解耦条件以及对应的短路阻抗关系;然后,用ANSOFT12分别对带对称负载和非对称负载进行了仿真,制作了变压器模型并进行了多工况实验,仿真和实验结果验证了理论的正确性。该变压器绕组和铁心结构简单,A相和C相绕组完全对称,便于设计制造。同时,原边有可以引出接地的中性点,副边有容纳三次谐波电流的闭合回路,两相输出电压有公共点,适用于需要单相或两相电源供电的场合。To deal with a power system′s three-phase unbalance caused by single or two phase load,a novel impedance matching balance transformer is presented.The basic principle of the balance transformer is illustrated.The basic equations of the transformer are established.The current relationships of the primary windings and second windings are derived.The balance condition,the two-phase decoupling condition and the relationship of the short-circuit impedance are deduced.Then transformer with symmetric load and asymmetric load are both simulated through ANSOFT12.A transformer model is established to conduct different working conditionstests.The simulations and the test results verify the theoretical analysis.The transformer′s iron and windings both have a simple structure,and A and C phase windings are completely symmetrical,so the design and manufacture is convenient.The neutral point is grounded.The secondary windings are connected into a closed loop to hold the third harmonic currents.The two symmetrical output voltages have a public point.The transformer can be used in single or two-phase power supply.

关 键 词：阻抗匹配 变压器 解耦 负序电流 零序电流 

分 类 号：TM401[电气工程—电器]