CAJ | 학술논문

依据某超临界350 MW机组汽动引风机系统设备性能，设计了汽动引风机的启动控制方案。借鉴国内机组的汽动引风机炉膛压力控制策略，结合该机组汽动引风机的特性及运行工况，对引风机入口导叶及引风机汽轮机转速2种炉膛压力控制方式之间的自动无扰切换进行了优化。从炉膛内风量质量守恒的角度分析了引风机快速减负荷(RB)试验结果，并给出了汽动引风机RB过程相对于电动引风机RB过程中炉膛压力变化趋势相反的原因，为优化同类型引风机控制提供依据。
의거모초림계350 MW궤조기동인풍궤계통설비성능，설계료기동인풍궤적계동공제방안。차감국내궤조적기동인풍궤로당압력공제책략，결합해궤조기동인풍궤적특성급운행공황，대인풍궤입구도협급인풍궤기륜궤전속2충로당압력공제방식지간적자동무우절환진행료우화。종로당내풍량질량수항적각도분석료인풍궤쾌속감부하(RB)시험결과，병급출료기동인풍궤RB과정상대우전동인풍궤RB과정중로당압력변화추세상반적원인，위우화동류형인풍궤공제제공의거。
According to performance of steam-driven draft fans in a supercritical 350 MW unit,the start con-trol scheme of the steam-driven draft fans was designed.On the basis of furnace pressure control strategy of steam-driven draft fans in domestic units and combining with the characteristics and operating conditions of the steam-driven draft fans,the automatic and undisturbed switching of the entrance guide blade and tur-bine speed was improved.According to the process of run back (RB)test,the RB results were analyzed from aspects of flow mass conservation inside the furnace.Moreover,the reason why furnace pressure changed oppositely in RB test of steam-driven fans and in that of electrically driven fans was explalned.