双绕组发电机交流侧带负载直流侧突然短路分析

摘要

According to the basic flux-linkage and voltage equations and equivalent circuits of 3-&12-phase doublewinding AC-DC generators, the steady-state electromagnetic expressions were analyzed and the corresponding phasor diagram was given, the basic voltage equations after sudden DC-side short circuit of 3- &12-phase double-winding ACDC generators with the 3-phase AC-winding loaded were presented, with some appropriate approximations, the transient process of the sudden DC-side short circuit was analyzed by making an analytical approach, and the concise time constant expressions of the stator and rotor windings and complete expressions of the AC-side short-circuit currents of the 12-phase DC winding as well as the approximate expression of DC-side maximum short-circuit current were derived.The calculated and measured results agree quite well.%根据3/12相双绕组发电机的基本磁链方程和电压方程以及等效电路,本文分析了双绕组发电机交流侧带负载直流侧空载时的稳态电磁关系并给出了相应的矢量图;建立了双绕组发电机交流侧带负载时直流侧突然短路的基本电压方程;通过适当的近似,用解析的方法分析了突然短路的过渡过程,给出了定转子时间常数的简明表达式和整流绕组交流侧的短路电流表达式以及直流侧最大短路电流的近似计算公式;通过模拟样机实机试验检验了理论分析的准确性.