基于J-A磁滞模型的高效电磁暂态变压器建模

Efficient Electromagnetic Transient Modeling of Transformer Based on J-A Hysteresis Model

提出了一种基于J-A(Jiles-Atherton)模拟变压器磁滞的电磁暂态变压器模型,使用差分的方式得到离散化模型,并采用注入电流源的方式将J-A磁滞模型加入到变压器中。通过深入分析不同仿真步长下J-A模型方程的数值特性,使用多速率仿真方法改进了J-A磁滞模型的计算效率;通过多个算例的对比测试验证了所实现模型的正确性;通过对计算耗时的对比测试验证了所提出计算模型对计算效率的提高。为在电磁暂态仿真平台实现基于J-A模型的变压器磁滞模拟提供了一种高效可靠的实现方法。

An electromagnetic transient model of transformer is proposed based on the J-A(Jiles-Atherton)model simulating its hysteresis characteristics.Differentiation is used to obtain the discrete model.The J-A hysteresis model is implemented by injecting extra current source to the transformer model.By thorough analysis of the numerical characteristics of the J-A model in different simulation step length,the computation efficiency is improved through the use of multi-rate simulation schema.By comparing multiple test cases,the proposed model is validated.The improvement of efficiency is also verified through the comparison of consumed times.It provides an efficient and reliable implementation method for transformer hysteresis simulation based on J-A model in electromagnetic transient simulation programs.