一种同步发电机同步电抗的测算方法  

A Method of Measuring Synchronous Reactance of Synchronous Generator

作　　者：赵利 ZHAO Li(School of Mechanical and Electrical Engineering,Shanxi Datong University,Datong Shanxi,037003)

机构地区：[1]山西大同大学机电工程学院,山西大同037003

出　　处：《山西大同大学学报（自然科学版）》2024年第5期17-20,共4页Journal of Shanxi Datong University(Natural Science Edition)

摘　　要：同步电抗是表征同步电机的重要参数,是分析同步电机运行性能的主要依据,获取同步电抗主要是通过实验方法测算。目前的实验测算法有操作控制不便、受人为因素影响产生误差大等诸多缺点,因此,本文根据同步发电机不同负载的工作特性、利用同步发电机的等效电路及空间相矢图,给出一种实用的不饱和同步电抗测算方法。对凸极式同步发电机的直轴同步电抗测算采用定子回路串三相对称电容负载的方法;对交轴同步电抗测算采用定子回路串入三相对称电阻负载的方法,最后将这种方法得到的结论推广到隐极同步发电机同步电抗的计算,二者结果相同,从而验证了这种方法的正确性,为用户正确、有效应用同步电机提供理论依据。Synchronous reactance is an important parameter to characterize the synchronous motor,which is the main basis for analyzing the operating performance of the synchronous motor,and the synchronous reactance is mainly measured by experimental methods.The current experimental measurement method is inconvenient to operate and control,and has many shortcomings such as large errors caused by human factors,therefore,this paper gives a practical method of unsaturated synchronous reactance measurement based on the operating characteristics of different loads of synchronous generator,the equivalent circuit of synchronous generator and the space phase vector diagrams.The straight-axis synchronous reactance of the convex-pole synchronous generator is calculated by stringing three symmetrical capacitive loads in the stator circuit,and the cross-axis synchronous reactance is calculated by stringing three symmetrical resistive loads in the stator circuit,and finally,the conclusions obtained by this method are extended to the calculation of synchronous reactance of the hidden-pole synchronous generator,which have the same results,thus verifying the correctness of this method and providing theoretical bases for the users to apply synchronous generator correctly and efficiently.It provides the theoretical basis for users to apply synchronous motor correctly and effectively.

关 键 词：凸极同步发电机 交轴同步电抗 直轴同步电抗 空间相矢图 

分 类 号：TM341[电气工程—电机]