中文摘要：

在变压器等值回路方程的基础上，提出一种新的变压器绕组匝数比和漏电感参数的计算模型，该模型以回路方程差值最小为目标。采用现代内点算法求解各参数并利用MATLAB编程实现。该方法仅需利用变压器正常运行时的电压、电流信息，不用获取变压器绕组结构参数以及有栽调压分接开关位置信息，易于实现。利用ATP软件建立变压器仿真系统，模拟变压器各种正常运行状态，并利用动模实验数据对所提方法进行验证。仿真实验结果表明，所提方法不受变压器运行状态及其三相参数不平衡的影响，具有较高的计算精度。

英文摘要：

A model for calculating the turn ratio and leakage inductance of transformer winding is presented based on the equivalent loop equation of transformer,which takes the minimal error of loop equation as its optimization objective. The modem interior point method and the MATLAB programming are applied to solve its parameters. The method only needs the voltage and current information of transformer under normal operating condition,which is easy to implement because the winding structure and tap position are not involved. Various normal operating conditions are simulated by ATP simulation and the data of dynamic experiments are applied for verification,which shows that,not affected by the operating conditions and the unbalanced three-phase parameters of transformer,the proposed method has higher precision.