电工技术学报2025，Vol.40Issue(18)：5805-5817,13.DOI:10.19595/j.cnki.1000-6753.tces.241378
基于场路耦合模型的大型交流励磁电机电感参数计算
Calculation of Inductance Parameters for Large AC Excitation Machine Based on Field-Circuit Coupled Model
摘要
Abstract
Large AC excitation machines are widely used in variable-speed pumped-storage power plants due to their excellent dynamic characteristics and wide speed regulation range.The inductance parameters of the AC excitation machines exert a direct influence on the operational performance and protection setting of the power station.Consequently,it is essential to conduct precise calculations.The finite element-based computational method with high accuracy is time-consuming.Furthermore,substantial variances exist among the current analytical calculation models for the diverse leakage inductance of motors,complicating the process of inductance modeling and solution.Therefore,the paper proposes an analytical model of the inductance for the AC excitation machine based on a field-circuit coupling model. Firstly,the exact subdomain approach and the magnetic network method are integrated to establish a field-circuit coupling model of the AC excitation machine,considering the saturation effect.The vector magnetic potential of each subdomain is solved.Secondly,based on the motor vector magnetic potential,a complete analytical model of the slot leakage inductance,harmonic leakage inductance,tooth tip leakage inductance,and excitation inductance of the motor is established according to the energy method and flux linkage method.The end leakage inductance is calculated using the numerical integration method of the vector magnetic potential.Finally,taking a 10 MW AC excitation machine as an example,the errors of the stator leakage inductance,rotor leakage inductance,and excitation inductance calculated by the proposed method are 4.0%,3.1%,and 4.5%of the finite element method,and the errors are 2.72%,5.12%,and 3.76%of the experiments,respectively.The computational errors of the proposed approach are significantly reduced,falling into the engineering-permissible range. The inductance field-circuit coupling solution model established in this paper has a simple modeling process and a straightforward physical process.Compared with the finite element method,this model can significantly reduce the calculation time and has higher accuracy.The inductance analytical model can be used for power limit and operational stability prediction,as well as the rapid optimization design of the electromagnetic schemes.关键词
交流励磁电机/场路耦合/矢量磁位/电感计算Key words
AC excitation machine/field-circuit coupling model/magnetic vector potential/inductance calculation分类
信息技术与安全科学引用本文复制引用
康皓宇,马一鸣,孙鲁,王晋,周理兵..基于场路耦合模型的大型交流励磁电机电感参数计算[J].电工技术学报,2025,40(18):5805-5817,13.基金项目
国家重点研发计划资助项目(2024YFE0208100). （2024YFE0208100）
