1000MW二次再热机组旁路控制策略和应用

Control Strategies for Bypass System of a 1000MW Double-reheat Unit and the Application

1 000 MW超超临界二次再热机组采用三级旁路,其控制策略是在传统旁路控制策略的基础上设计研发的一种全新控制逻辑。介绍了高、中、低三级旁路在机组启停、正常运行及异常情况下的控制方式和策略,结合某机组的调试说明旁路的应用情况、存在问题和优化方案。

The 1 000 MW ultra-supercritical double-reheat unit adopts the triple-stage bypass system, and its control logic is newly developed based on traditional control strategies. The control modes and strategies respectively for the high-, medium- and low-pressure bypass system are described under startup, shutdown, normal operation and abnormal operation conditions, combined with analysis on corresponding application situation, existing problems and optimization schemes of relevant bypass systems in a certain unit during commissioning period.