摘要
以IEEE次同步谐振(Subsynchronous Resonance,SSR)第一标准测试模型为例,详细介绍了如何预测汽轮发电机轴系扭振模态。利用测试信号法计算系统的电气阻尼,通过模态调整法得到模态机械阻尼,利用复转矩系数法判定轴系扭振模态。最后在加入机械阻尼的测试模型中施加三相短路扰动,对轴系各个质量块扭振转矩的幅频分析验证扭振模态预测的正确性,分析结果显示在计及机械阻尼的情况下,只有与电气谐振频率互补的扭振模态发生SSR。
Based on the IEEE subsynchronous resonance, the thesis taskes the advantage of an example of the first standard test model to depict how to predict torsional vibration mode of steam turbine generator shafting in great details. The electrical damping can be calculated with method of the test signal, the modal mechanical damping can be figured out by means of the modal adjustment, and the complex torque coefficient method determines the shaft torsional vibration mode. In the end, three-phase short perturbation is applied to the test model with the attachment of mechanical damping and mass of shafting torsional vibration torque amplitude and frequency are analyzed to verify the correctness of the tor- sional vibration mode prediction, then the analysis＇s outcome showed that when the mechanical damping taken into ac- count, if and only if the torsional vibration mode are complementary to electrical resonance frequency, then SSR of the torsional vibration mode comes into being.
出处
《电气开关》
2013年第5期66-69,73,共5页
Electric Switchgear
