双绕组发电机直流侧突然短路后交流侧电压电流的变化研究
首发时间:2005-03-07
摘要:本文给出了3/12相双绕组发电机交流侧带负载直流侧突然短路后交流绕组电流的表达式,分析了直流侧短路后交流绕组电压电流的变化过程,并给出了必要的物理解释。结果表明:双绕组发电机交流侧带负载直流侧突然短路后,整流绕组交流侧和交流绕组的相电流均含有基频分量、直流分量和二次谐波分量;短路后交流绕组的电压电流均迅速减小为幅值很小的稳态基波电压电流,不会产生大的冲击电压或电流。通过试验进行了验证。
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CHANGES OF THE AC-SIDE VOLTAGES AND CURRENTS AFTER SUDDEN DC-SIDE SHORT CIRCUIT IN A 3- &12-PHASE DOUBLE-WINDING AC-DC GENERATOR
Abstract:The complete expressions of the AC-side load currents of a 3-&12-phase double-winding AC-DC generator after sudden DC-side short circuit are presented, the AC-side voltage and current changes are studied , and the corresponding physical interpretations are given. The results show that both the AC-side currents of the AC winding and the AC-side short-circuit currents of the DC winding consist of the fundamental-frequency, second harmonic and DC components; both the AC-side voltages and currents decay rapidly to very small steady-state values, and no impact voltage or current occur. The calculated and measured results agree quite well, showing the validity of the analysis developed.
Keywords: Double-Winding AC-DC Generator Sudden Short Circuit Short-Circuit Current
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