9FA燃气轮机点火前可燃气体浓度高遮断的原因分析和逻辑优化

摘要

For the two shift peakload operation of 9FA gas turbine combined cycle unit, the valve seal will be greatly affected, which is caused by fuel control valve frequent adjustment and behavior greatly variation.It will lead to leakage of hazardous gas, and concentrat-ed in fuel chamber space, thus easily lead to the hazardous gas level high trip in the start-up of the unit, which effect unit start-up suc-cess rate.This article analysis result of start failure due to the pre-ignition of hazardous gas level high trip, and puts forward the corre-sponding logic optimization.It can be beneficial to improve the unit start-up success rate, which achieved good results.%针对两班制调峰运行的9FA燃气轮机联合循环机组，燃料控制阀动作频繁，工况变化较大，对阀门密封性将产生很大影响，导致可燃气体泄漏，在密闭的燃料小室集聚，从而在机组启动时容易引起可燃气体浓度高遮断发生，影响机组启动成功率。通过对历次可燃气体浓度高遮断造成启动失败进行了分析，提出了相应的逻辑优化，有益于提高机组启动成功率，取得了良好的效果。