SSR 工况下600 MW 机组轴系扭矩响应分析

摘要

It’s a threat to the shafting safety of a steam turbo-generator when power system occurs subsynchronous resonance (SSR).Refering to the IEEE first benchmark model and a certain 600MW unit’s parameters,the paper builds up simulation modal and shafting modal in PSCAD/EMTDC and Ansys separately .By simulating the SSR ,the paper gets the response of generator electromagnetic torque and shafting journals torque .At last,the paper calculates the shafting stress distribution .%电力系统发生次同步谐振（ subsynchronous resonance ，SSR）会严重威胁汽轮发电机组轴系的安全。以IEEE第一标准模型为基础，首先在暂态时域仿真软件PSCAD／EMTDC中搭建了某型600MW汽轮发电机组SSR仿真模型，得到了工作频率下机组发生SSR时发电机的电磁转矩响应；其次，利用Ansys软件对轴系的扭振进行模拟，得到机组在SSR时轴颈部分的扭矩响应；最后，详细分析了SSR工况下轴系各部分的受力情况。