凸极永磁同步交流发电机负载特性的数值分析  

Numerical Analysis for the Load Characteristic in a Salient-Pole Permanent Magnet Synchronous Generator

作　　者：沈跃[1] 苏义脑 李林 李根生[3] 

机构地区：[1]中国石油大学物理科学与技术学院,东营257061 [2]中国石油集团钻井工程技术研究院,北京100083 [3]中国石油大学石油工程教育部重点实验室,北京102249

出　　处：《电工技术学报》2009年第7期28-33,共6页Transactions of China Electrotechnical Society

基　　金：教育部创新团队基金(LRT0411);国家高技术研究发展计划(863)(2006AAOA103)"气体钻井技术与装备"

摘　　要：通过相量法建立起永磁同步交流发电机的内阻抗数学模型,采用数值分析手段研究了发电机外特性、电压调整率、有功输出功率与电枢反应电抗关系。结果表明,发电机内阻抗具有电流和功率因数角负反馈特性,使得电压调整率在一定程度上得到改善,感性负载下电压调整率的改善效果取决于直轴反应电抗,阻性负载下取决于交轴反应电抗,根据数值计算和分析确定出了获得最佳电压调整率时电枢反应电抗的变化范围。通过发电机外特性的实验测量与数据分析,实验结果与理论计算相吻合,说明了根据发电机电枢反应所建研究模型的正确性,为永磁发电机的电磁设计提供了一定的理论指导作用。The load characteristic analysis of permanent magnet synchronous generator is presented. An internal impedance mathematical model of the generator is build with phasor analysis method for analyzing the relationship between exterior voltage characteristic or voltage regulation rate, active power and armature reactance. The research results demonstrate that the internal impedance of generator has both current and power factor angle feedback characteristic, which makes the voltage regulation rate be improved to a certain extent and the improved effect lying on both the d-axis armature reactance under condition of an inductive load and the q-axis armature reactance under resistive load. Additionally, an optimal variation range of the armature reactance in which there is less voltage regulation rate is put forward with numerical calculation and analysis. An experimental result based on the experimental measurement of exterior voltage characteristic corresponds to the theoretical calculation, which demonstrates the correctness of the research model based upon the armature reaction analysis. Those can provide the theoretically guidance to the electromagnetic design of permanent magnet generator.

关 键 词：电枢反应电抗 电压调整率 相量 功率因数 有功功率 数值分析 

分 类 号：TM351[电气工程—电机]