600MW超临界机组凝泵变频控制及效果分析

The Control and Annalistic about Frequency Conversion of Condensate Pump in 600MW Supercritical Units

节能减排是电力行业的一项基本要求,属于考核范围的重要项目之一。在大型发电企业中,各企业都在寻找各种节能减排的方式,凝泵变频控制受到更多的电厂重视和应用推广。本文介绍了浙能乐清电厂在#1机大修过程中对凝泵控制进行了改造,采用变频器控制。根据凝泵变频器的特点和除氧器两个调节阀的特性,对除氧器水位控制策略进行了完善和改进。现场的实际应用表明,改进后的凝泵变频器控制能有效的降低凝泵的耗电量,减小阻力损失,降低企业生产成本,凝泵变频器的控制和除氧器水位调节阀配合在一起能很好的对除氧器水位进行控制。

Energy saving and emission reduction is one basic demand in electrical power industry; it is also one important item in the project assessment. Large power industries are looking for good ways to save energy and reduce emission; they pay more attention to the control of frequency conversion of condensate pump, and promote its usage. This paper states on how to refine the control strategy of condensate pump using transducer in one complete overhaul of #1 unit. Based on the characteristic of condensate pump transducer and two relay valves of deaerator, we improve the strategy of water level control in the deaerator. The real performance indicates that the improved condensate pump transducer can reduce the power consumption, decrease the loss in resistance and lower down the cost of production, and that the combination of transducer and relay valves of deaerator can control the water level of deaerator very well.