3/12相双绕组发电机交直流同时突然短路研究  

SUDDEN SIMULTANEOUS AC-&DC-SIDE SHORT CIRCUITS OF 3-&12-PHASE SYNCHRONOUS GENERATORS WITH AC AND BRIDGE RECTIFIED DC OUTPUT

作　　者：孙俊忠[1] 马伟明[1] 吴旭升[1] 刘德志[1] 杨青[1] 

机构地区：[1]海军工程大学电力电子技术应用研究所,湖北武汉430033

出　　处：《中国电机工程学报》2003年第2期71-76,共6页Proceedings of the CSEE

基　　金：国家自然科学基金项目(59777007)

摘　　要：根据3/12相双绕组发电机的基本磁链和电压方程以及等效电路,该文用解析分析和电路模型仿真两种方法详细研究了交直流同时突然短路的过渡过程,得出了定转子短路时间常数和交流侧短路电流的完整表达式;通过适当的近似,进一步给出了适合工程应用的交流侧短路电流的近似和简明表达式以及直流侧最大短路电流的估算公式。另外,还研究了线路电阻对短路电流的影响,结果表明:在分析和测试交直流同时突然短路时,线路电阻,尤其是 直流侧线路电阻必须考虑。仿真和实验验证了该文所得数学模型及分析方法的准确性。According to the basic equations and equivalent circuits of 3-&12-phase synchronous generators with AC and bridge rectified DC output, the sudden simultaneous AC-&DC-side short-circuit transient processes are analyzed in detail by the analytic method and circuit-model simulation .The short-circuit time constants of the stator and rotor windings and complete expressions of AC-side short-circuit currents are given; then the approximate and concise formulas of the AC-side short-circuit currents and the maximum value of DC-side short-circuit current are derived .Moreover, the effects of the line resistances on short-circuit currents are studied .Comparison between the computed and measured results demonstrates the validity of the simplified mathematical model and analytic approaches developed, and the results show that the resistances of the lines, especially the one of DC-side line have to be taken into account in the analysis of sudden simultaneous AC-&DC-side short-circuit operations.

关 键 词：3/12相双绕组发电机 等效电路 电路模型仿真 交流短路电流 直流短路电流 

分 类 号：TM31[电气工程—电机]