370 MW机组APS改造工程

Retrofitting project of 370 MW unit APS system

介绍了利港电厂4号机组在大修时进行自启停控制系统(APS)的改造工程。在该工程中设计了减温水差压控制功能组、给泵自动并退泵功能组、加热器自动投停功能组、锅炉三大风机启停功能组、磨煤机启停功能组等,以实现主要辅助系统自动启停。结合机组控制系统改造设计增加了APS程序,用步序执行器完成机组启停步序的条件判断并自动执行机组启停的分步操作,真正实现了机组启停全过程的完全自动化。APS程序经过模拟仿真后,在利港电厂4号机组全面投用。大修后机组整个启动过程安全、平稳、速度快。

The retrofitting project of APS（Automatic Power plant start-up and shut-down System） for unit 4 of Ligang power plant is introduced.The function groups of desuperheater water differential pressure control,automatic feedwater pump start-up or shut-down,automatic heater start-up or shut-down,automatic boiler draft fan start-up or shut-down and automatic mill start-up or shut-down are designed to realize the automatic start-up or shut-down of main auxiliary systems.The APS program is added.The step-sequence executor is applied to judge the step conditions and execute step operation of APS automatically and completely.The APS program is applied to unit 4 after simulation.After retrofitting,the whole process of unit start-up becomes safe,stable and fast.