600MW机组直接空冷系统动态特性研究  

Experimental study on dynamic characteristics of direct air-cooling system in a 600MW unit

作　　者：刘文华 李高潮[2] 闫永强[2] 陈胜利[2] 荆涛[2] 吕凯[2] 万超[2] 

机构地区：[1]内蒙古霍煤鸿骏铝电公司,内蒙古通辽028000 [2]西安热工研究院有限公司,陕西西安710032

出　　处：《热力发电》2014年第3期76-78,112,共4页Thermal Power Generation

摘　　要：通过对某600MW机组直接空冷系统在不同空冷风机频率、不同机组负荷以及不同环境温度下动态特性的试验研究发现:空冷风机运行频率越低,机组背压随着环境温度变化的速率越大;在风机运行频率不变时,环境温度越高,机组背压随负荷变化率越大;在环境温度不变时,风机频率越低,机组背压随负荷变化率越大;机组负荷不变时,环境温度越低,空冷风机频率的变化对机组背压的影响越小。The effects of factors like air-cooling fan＇s frequency,unit load and ambient temperature on dynamic characteristics of the direct air-cooling system in a 600 MW unit was experimentally studied. The results showed that, the lower the air-cooling fan＇s frequency, the higher the variation speed of turbine back pressure against the ambient temperature;with a constant air-cooling fan＇s frequency, the variation rate of turbine pressure against the unit load increased/decreased with the ambient temperature;at a constant ambient temperature,the variation rate of turbine back pressure against the unit load showed an opposite change trend with the air-cooling fan＇s frequency; when the unit load was kept constant, the lower ambient temperature, the less effect of air-cooling fan＇s frequency on the turbine back pressure.

关 键 词：600 MW机组 直接空冷 风机频率 环境温度 负荷变化 动态特性 

分 类 号：TK264.1[动力工程及工程热物理—动力机械及工程]