异步机状态的能量观及其对同步发电机不对称短路的启示  

Energy Viewpoints of Asynchronous Machine State and TheirEnlightenment to Asymmetric Short Circuits of Synchronous Generators

作　　者：程小华[1] Cheng Xiaohua(Electrical Power Engineering College,South China University of Technology,Guangzhou 510640,China)

机构地区：[1]华南理工大学电力学院,广东广州510640

出　　处：《防爆电机》2023年第2期1-4,共4页Explosion-proof Electric Machine

摘　　要：从能量(功率)的角度,详尽分析了异步机全部五种状态的特征。特别值得强调的是制动状态的特征:从定子和转子两个方向汲取功率,用于转子绕组的铜耗。该铜耗转化为热能,导致转子绕组过热,甚至被烧毁。从中得到对同步发电机不对称短路的启示:负序猛于虎,千万要当心。From the viewpoint of energy(power),this paper analyzes the characteristics of all five states of asynchronous machines in detail,and especially emphasizes the characteristics of braking state,i.e.the power is drawn from two sides of both stator and rotor for the copper losses of rotor windings.The copper loss is converted into heat energy,which overheats the rotor windings,even burnt down it.In this paper,we can obtain the inspiration from the asymmetric short circuits of synchronous generators that negative sequence currents are the most dangerous and should be taken careful with.

关 键 词：异步机 能量观 转子铜耗 电磁功率 转换功率 同步发电机 不对称短路 

分 类 号：TM301[电气工程—电机]