增压风机和引风机协调控制策略的应用  

The Application of Boosting Fan and IDF Coordinated Control System

作　　者：张永军[1] 陈波[1] 

机构地区：[1]浙江省电力试验研究院,浙江杭州310014

出　　处：《自动化博览》2009年第11期87-89,共3页Automation Panorama1

摘　　要：脱硫系统增压风机一般用来控制增压风机入口压力,由于风烟系统的管路特性,炉膛压力变化和增压风机入口压力变化存在一定的时间差,当烟气流量大幅变动时,增压风机控制往往容易和引风机的炉膛压力控制产生谐振,导致被控量波动幅度过大,波动时间过长,甚至发生发散。为了克服这种现象,在传统逻辑中针对风机RB增加了相应的前馈,并减弱了增压风机的调节作用,从而降低了正常工况下增压风机的控制品质。针对上述问题,本文通过理论分析,在仿真的基础上提出了一种风机协调控制的控制策略。并以某300MW机组的工程实例,说明了该控制策略的实施过程和实施效果。The boosting fan of Desulphurization is used to control entrance pressure of boosting fan. On account of pipeline characteristic, entrance pressure of boosting fan is changed after the change of furnace pressure. By this control strategy, furnace pressure and entrance pressure of boosting fan fluctuate chronically when gas flux alter great range, Syntony, even radiation is bring to control system. In order to overcome the phenomenon, usually, the related feed-forward is added to fan RB in the traditional logic design, and moreover, the tune function of boosting fan was weakened and therefore the control quality was debased. All these problems of traditional control strategy are introduced in this paper. According to theoretical analysis and emulation, a new control strategy on boosting fan and IDF （induced draft fan） fan coordinated control System are presented and taken a 300MW power plant for an example, we illustrate the implementation process and effect.

关 键 词：脱硫 增压风机 引风机 炉膛负压 控制策略 

分 类 号：X701.3[环境科学与工程—环境工程]