凝汽器罗茨水环真空泵抽气系统控制与仿真  

Control and simulation of Roots water-ring vacuum pump extraction system for condenser

作　　者：王骏[1] 朱灵瑜 吴正勇[1] 卢承斌[1] 姚永灵[1] 黄恩和 WANG Jun;ZHU Lingyu;WU Zhengyong;LU Chengbin;YAO Yongling;HUANG Enhe(Jiangsu Frontier Elctrical Power Technology Co.,Ltd.,Nanjing 211106,China;Schoo of Energy and Environment,Southeast University,Nanjing 210096,China)

机构地区：[1]江苏方天电力技术有限公司,江苏南京211106 [2]东南大学能源与环境学院,江苏南京210096

出　　处：《电力工程技术》2020年第4期214-219,共6页Electric Power Engineering Technology

摘　　要：文中针对目前电厂凝汽器采用的罗茨-水环真空泵复合抽气系统存在的配置不当、凝汽器真空度降低等问题,提出了两级压缩的罗茨水环真空泵变频控制抽气系统,通过合理分配两级压缩比,改善抽气性能,降低系统抽气功率。基于真空泵数学模型建立抽气系统仿真试验平台,以提高抽气能力、降低泵组功率为目的确定最优运行方案并制定相应变频系统控制策略。进行了凝汽器进汽量、循环水量阶跃和启动阶段真空建立试验,结果表明抽气系统控制策略可靠,系统运行平稳,相比于定转速系统,变频系统节能效果明显。Based on the prevailing problems of the Roots water-ring vaccum pump combination extraction system for steam turbines that the inappropriate configuration of vaccum pumps leads to the increase of condenser vaccum degree,this paper put forward a Roots water-ring pump frequency conversion control extraction system. Based on the mathematical model of vaccum pumps,a simulation experimental platform for the extraction system is established. Aimed at increasing the pumping capacity and reducing energy-consuming,the optimal operation plan is beterminede,the control strategy of the frequency conversion system is developed,the condenser step tests are performed. The results show that the control strategy of the pumping system is reliable and the system runs smoothly. And the frequency conversion system has obvious energy saving effect compared to the fixed speed system.

关 键 词：气冷式罗茨泵 水环真空泵 控制策略 压缩比分配 变频系统 

分 类 号：TM621[电气工程—电力系统及自动化]