考虑磁滞特性变压器PSCAD/EMTDC电磁暂态仿真建模方法及励磁差异性分析  

A Transformer Model With Hysteresis Characteristics for Electromagnetic Transients Based on PSCAD/EMTDC and Excitation Difference Analysis

作　　者：吴嘉琪[1] 李晓华[1] 陈忠[2] 丁晓兵[3] 田庆[3] 

机构地区：[1]华南理工大学电力学院,广东省广州市510640 [2]中国南方电网有限责任公司超高压输电公司,广东省广州市510620 [3]中国南方电网有限责任公司电力调度控制中心,广东省广州市510623

出　　处：《中国电机工程学报》2017年第5期1543-1551,共9页Proceedings of the CSEE

基　　金：国家自然科学基金项目(51377059)~~

摘　　要：为了研究高压直流输电中励磁涌流问题,该文结合ATP-EMTP电磁暂态仿真软件中描述铁心铁磁材料磁滞特性的非线性电感Type96以及BCTRAN共同建立考虑磁滞特性变压器模型思想,提出一种考虑磁滞特性变压器PSCAD/EMTDC电磁暂态仿真新模型。该模型在经典模型的基础上增加了考虑磁滞特性的励磁支路,利用试验获得的最大磁滞回线数据便可有效地反映变压器的磁滞特性,验证表明该模型能很好地反映变压器磁滞特性,且因参数易得,便于用户在PSCAD/EMTDC中仿真使用。同时也仿真研究利用磁滞回线和磁滞中线模拟变压器励磁特性的差异性,得出采用磁滞中线代替磁滞回线来模拟变压器铁心励磁特性在励磁涌流峰值上具有一致性,但磁滞回线对涌流稳态过程特别是谐波特性有较大影响。In order to research the inrush problems in HVDC transmission projects, a new three-phase transformer model with hysteresis characteristics of PSCAD/EMTDC was presented, which derives from ideas of the transformer model considering hysteresis characteristics in ATP-EMTP, in which it consists of Type96 and BCTRAN. This model added an excitation branch considering hysteresis characteristics based on the classical model. The hysteresis characteristics can be described effectively when using experimental data obtained. The simulation results show that the model reflects excitation characteristics well, and parameters are readily available, it＇s easy for users to use it in PSCAD/EMTDC. It also studied the differences of excitation characteristics simulated by the hysteresis loop and the hysteresis midline, and it concluded that there is a consistency in respect of the inrush current peak in transient process if the hysteresis midline instead of the hysteresis loop to simulate the excitation characteristics of transformer cores, but the hysteresis loop has a greater impact on the transient process especially the harmonic characteristics of inrush current.

关 键 词：磁滞回线 磁滞中线 励磁特性 三相经典变压器模型 ATP-EMTP PSCAD/EMTDC 电磁暂态仿真 

分 类 号：TM41[电气工程—电器]