同步发电机气隙对其稳定性和有功功率影响的研究  

Research of influence of synchronous generator air-gap on stability and active power

作　　者：曹帅[1] 张清枝[2] 

机构地区：[1]郑州大学电气工程学院,河南郑州450001 [2]新乡学院机电工程学院,河南新乡453003

出　　处：《电力系统保护与控制》2015年第15期91-95,共5页Power System Protection and Control

摘　　要：为研究同步发电机的稳定性和有功功率,利用凸极同步发电机的时空矢量图推导出其电枢反应的电动势平衡方程。在此基础上,通过DDSZ-1型凸极同步发电机接入三相对称负载的运行特性的实验结果,分析研究其转子磁路的结构对运行稳定性的影响,得出如果转子气隙较小则并联运行时发电机的稳定度较差,反之则稳定性较好的结论。最后利用同步发电机功角时空矢量图,推导出其电磁功率计算公式,并得出转子气隙对有功功率的影响,即在空间范围内各方向等比例增大转子气隙可以增加电机输出的有功功率。To study the stability and active power of the synchronous generator, this paper deduces the electromotive torce balance equation of its armature reaction by use of its time ＆ space vector diagram. Based on this, through the result of the operation characteristics experiment of DDSZ-1 salient pole synchronous generator connected to the three-phase symmetrical load, it analyzes the influence of its rotor magnetic circuit structure on operation stability, and draws the conclusion that the smaller the rotor air-gap is the poorer its stability of parallel operation, vice versa. Finally, with synchronous generator power angle of time and space vector diagram, its electromagnetic power calculation formula and the influence of the rotor air-gap on active power are deduced, i.e. increasing the rotor air-gap to each space direction proportionally can increase its active power.

关 键 词：时空矢量图 同步电抗 功角 稳定性 有功功率 

分 类 号：TM31[电气工程—电机]