多相环形无刷励磁系统的运行特性分析  

Analysis of operation characteristics of multiphase annular brushless excitation system

作　　者：郝亮亮[1] 胡启昊 张扬 任仰凯 宗卫晶 汪南华 HAO Liang-liang;HU Qi-hao;ZHANG Yang;REN Yang-kai;ZONG Wei-jing;WANG Nan-hua(College of Electrical Engineering,Beijing Jiaotong University,Beijing 100044,China;NR Electric Co.,Ltd.,Nanjing 211102,China;Yangjiang Nuclear Power Co.,Ltd.,Yangjiang 529941,China;Fujian Ningde Nuclear Power Co.,Ltd.,Ningde 355200,China;Guangxi Fangchenggang Nuclear Power Co.,Ltd.,Fangchenggang 538001,China)

机构地区：[1]北京交通大学电气工程学院,北京100044 [2]南京南瑞继保电气有限公司,南京211102 [3]阳江核电有限公司,广东阳江529941 [4]福建宁德核电有限公司,福建宁德355200 [5]广西防城港核电有限公司,广西防城港538001

出　　处：《电机与控制学报》2021年第7期30-39,共10页Electric Machines and Control

基　　金：中央高校基本科研业务费项目(2020JBM070);中广核集团公司科技项目(3100077013)。

摘　　要：为了研究多相环形无刷励磁系统的运行特性,提出了基于数学建模和等值电路的分析方法。首先分析了多相环形无刷励磁机及整流系统的工作原理及运行特点,得到了二极管导通模式和整流器工作的等效电路。之后建立了多相环形无刷励磁系统的数学模型,包括绕组方程、直流负载方程、系统总方程等,并基于关联矩阵得到了考虑多相整流桥实际状态的标准方程等。然后在十一相转极式动模样机平台上进行了相应的实验,并将实验结果与仿真结果进行了对比,验证了数学模型的准确性。在此基础上,对实际应用的某330 MW机组的十一相环形无刷励磁系统进行了仿真计算,并对各阶段的等值电路、二极管电流及负载电压等进行了解析分析,发现了二极管存在提前导通和多管同时导通现象,得到了等值内电势计算公式和负载电压平均值,为多相环形无刷励磁系统的设计与优化提供了依据。In order to study the operation characteristics of multiphase annular brushless excitation system, an analysis method based on mathematical modeling and equivalent circuit was proposed. Firstly, the working principle and operating characteristics of multiphase annular brushless exciter and rectifier system were analyzed, and the diode conducting mode and the equivalent circuit of rectifier were obtained. After that, the mathematical model of the multiphase annular brushless excitation system was established, including winding equation, DC load equation and total system equation, and the standard equation considering the actual state of the multiphase rectifier bridge was obtained based on the correlation matrix. Then the corresponding experiment was carried out on the platform of 11-phase dynamic model prototype, and the experimental results were compared with the simulation results to verify the accuracy of the mathematical model. On this basis, the 11-phase annular brushless excitation system of a 330 MW practical application was simulated, and the equivalent circuit, diode current and load voltage of each stage were analyzed analytically. It is found that the diodes conduct ahead of time and multiple diodes conduct at the same time. The calculation formula of equivalent internal potential and average load voltage were obtained. All of the above provide a basis for the design and optimization of multiphase annular brushless excitation system.

关 键 词：整流系统 数学模型 运行状态 多相环形 无刷励磁机 换相过程 

分 类 号：TM341[电气工程—电机]