交直流同时供电的发电机不对称突然短路分析  

Sudden Unbalanced Short Circuits of Synchronous Generators with Simultaneous AC and Bridge Rectified DC Output

作　　者：孙俊忠 马伟明[1] 杨青 吴旭升[1] 

机构地区：[1]海军工程大学,武汉市430033

出　　处：《中小型电机》2001年第3期21-25,共5页S&M Electric Machines

基　　金：国家自然科学基金资助项目 (5 97770 0 7)

摘　　要：通过适当处理交直流同时供电 (双绕组 )发电机两套绕组之间的耦合 ,建立了其α-β-ο系统的数学模型 (磁链方程和电压方程 ) ,并进行了合理简化 ;在此基础上 ,用归纳法得出了不对称短路统一的端点条件 ;然后根据谐波平衡原理 ,用解析法分析了其突然不对称短路运行 ;得出了统一的时间常数和短路电流表达式以及估算最大冲击电流的计算公式 ;并通过试验进行了验证。本文的结果适用于双绕组电机和其它多相电机的所有突然两相一两相不对称短路 。By dealing with properly the electromagnetic coupling between two sets of windings, the α β ο mathematical model of six phase synchronous generators with simultaneous AC and bridge rectified DC output (double winding generators) is established and simplified. Then, its general terminal conditions of short circuits are obtained by the inductive method and the sudden short circuits are analyzed in detail by the principle of harmonic balance. The general expressions of time constants and short circuit currents and the formula of the maximum value of the short circuit current are given. The results obtained are suitable for other double winding and multi phase generators; and also the method proposed applies to other unbalanced short circuits. Comparison between the computed and measured results demonstrates the validity of the theoretical approach developed.

关 键 词：发电机 短路分析 数学模型 交流 直流 供电 

分 类 号：TM31[电气工程—电机]