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中国电机工程学报 2007, 27(9) 92-98 DOI:
ISSN: 0258-8013 CN: 11-2107/TM |
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| 电工电机 |
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非同期并列时汽轮发电机组轴系弯扭耦合振动分析 |
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董玉亮 何成兵 顾煜炯 |
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电站设备状态监测与控制教育部重点实验室(华北电力大学) 电站设备状态监测与控制教育部重点实验室(华北电力大学) 电站设备状态监测与控制教育部重点实验室(华北电力大学) |
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摘要：
将逐步积分法的思想与传统传递矩阵法相结合，提出了增量传递矩阵方法。基于多段集中质量模型和增量传递矩阵法，并结合Riccati法，建立了汽轮发电机组轴系弯扭耦合振动瞬态响应求解模型。利用该方法，针对某200MW汽轮发电机组的120°和180°两种非同期并列情况，进行了机组弯扭耦合振动响应特性研究，分析表明：汽轮发电机组的120°和180°两种非同期并列情况下的弯振和扭振响应特性基本相似；非同期并列主要激发出工频和前两阶固有频率扭振，弯振除工频主分量外，第一阶固有频率也被激发出来；180°非同期并列时的暂态电磁力矩峰值比120°非同期并列时低，相应的扭振和扭矩响应也小于后者。 |
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关键词：
汽轮发电机组
弯扭耦合振动
增量传递矩阵法
非同期并列
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Coupled Flexural and Torsional Vibrations Analysis of Turbine Generator Shaft Systems Caused by Asynchronous Juxtaposition |
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Abstract:
An increment transfer matrix method based on step-by-step integration method and traditional transfer matrix method was put forward. Combined with Riccati method, the increment transfer matrix method was used in a multi-mass model. And matrix equations calculating the responses of coupled flexural and torsional vibrations were deduced. The responses properties of coupled vibrations for 120° and 180°asynchronous juxtaposition of 200MW turbine-generator set were analyzed. The results show that the responses properties of flexural and torsional vibrations caused by 120° asynchronous juxtaposition are similar to that of 180° asynchronous juxtaposition. When the fault happened, Former two steps inherence frequencies and whirl speed frequency of torsion are excited. And the first step inherence frequencies of flexural vibration are also excited besides whirl speed frequency. Transient electromagnetism moment peak, torsional and torsional moment responses caused by 180° asynchronous juxtaposition are lower than that of 120° asynchronous juxtaposition. |
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Keywords:
turbine-generator set
coupled flexural and torsional vibrations
increment transfer matrix method
asynchronous juxtaposition
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收稿日期 2005-12-31 修回日期 1900-01-01 网络版发布日期 |
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DOI: |
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基金项目:
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通讯作者: 何成兵 |
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作者简介: |
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