二维电磁场—路耦合仿真软件的开发与应用  

Development and Application of 2D Coupled Electromagnetic Field-circuit Simulation Software

作　　者：朱洒 施斌 周文亮 陆春锋 孙金超 蒋伟 ZHU Sa;SHI Bin;ZHOU Wenliang;LU Chunfeng;SUN Jinchao;JIANG Wei(Department of Energy and Electrical Engineering,Hohai University,Nanjing 210096,China;NR Electric Co.,Ltd.,Nanjing 210000,China;Nantong Power Supply Company of State Grid Jiangsu Electric Power Co.,Ltd.,Jiangsu Nantong 226000,China)

机构地区：[1]河海大学能源与电气学院,南京210096 [2]南京南瑞继保电气有限公司,南京210000 [3]国网江苏省电力有限公司南通供电分公司,江苏南通226000

出　　处：《高压电器》2021年第4期125-133,共9页High Voltage Apparatus

基　　金：国家自然科学青年基金(51907053);江苏省自然科学青年基金(BK20190489);中央高校基本科研业务费项目(B200202167);中国博士后基金面上项目(2019M661708)。

摘　　要：文中详述了一种二维瞬态电磁场与任意拓扑电路耦合仿真的原理及相应仿真软件的开发过程。根据直接耦合的思想,电路中的每个部件都视作一个有限元单元,而电路区域与电磁场区域通过细导线单元或粗导体单元联系起来,可实现任意拓扑电路与二维瞬态电磁场的耦合计算。文中详述了每种类型单元的单元方程的推导过程,并给出了单元刚度、质量和载荷矩阵的具体形式。为验证所开发软件的正确性,将其应用于一台7.5 kW永磁电机空载、正弦电流激励及PWM电压激励下的特性仿真,并与实测值进行了对比,验证了所开发软件的正确性。此外,通过对比正弦电流激励下和PWM电压激励下的计算损耗与实测值,证明了在永磁电机损耗计算中考虑PWM谐波电压影响的重要性。In this paper,the principle of coupled simulation for a kind of 2D transient electromagnetic filed with any topological circuit and the development process of corresponding simulation software are described in detail.According to the idea of direct coupling,each element in the electric circuit is deemed as a finite element(FE).However,the circuit region and the FE region are connected with either filamentary wire unit or solid conductor unit to achieve the coupling calculation between any topological circuit and the 2D transient electromagnetic filed.The derivation progress of element equation of each type of unit is described in detail and the specific form of the stiffness,mass and load matrix of the unit is given.For the purpose of verifying the correctness of the developed software,it is used for the characteristic simulation of a set of 7.5 kW permanent motor at no load,sinusoidal current excitation and pulsewidth modulation(PWM)voltage excitation.The correctness of the developed software is verified by the comparison with the actually measured value.Moreover,the importance of considering the influence of PWM harmonic voltage in the loss calculation of the permanent motor is proved by comparing the calculated and the actually measured loss at sinusoidal current and PWM voltage excitation.

关 键 词：瞬态电磁场 场—路耦合法 有限元法 永磁电机 

分 类 号：TP391.7[自动化与计算机技术—计算机应用技术] O441.4[自动化与计算机技术—计算机科学与技术]