基于性能仿真模型和Bootstrap的燃气轮机气路故障预警算法  

Early Warning Algorithm of Gas Turbine Gas Path Fault based on Performance Simulation Model and Bootstrap

作　　者：罗振宇 冯坤 刘保侠 闫斌斌 LUO Zhen-yu;FENG Kun;LIU Bao-xia;YAN Bin-bin(Key Lab of Engine Health Monitoring-Control and Networking of Ministry of Education,Beijing University of Chemical Technology,Beijing,China,100029;Beijing Key Laboratory of High-end Mechanical Equipment Health Monitoring and Self-Recovery,Beijing University of Chemical Technology,Beijing,China,100029;National Pipeline Network Group North Pipeline Co.,Ltd.,Langfang,China,065000)

机构地区：[1]北京化工大学发动机健康监控及网络化教育部重点实验室,北京100029 [2]北京化工大学高端机械装备健康监控与自愈化北京市重点实验室,北京100029 [3]国家管网集团北方管道有限责任公司,河北廊坊065000

出　　处：《热能动力工程》2023年第9期166-173,共8页Journal of Engineering for Thermal Energy and Power

摘　　要：针对传统均值标准差阈值法不能用于变工况故障预警这一问题,以三轴燃气轮机的性能仿真模型为基础,提出了基于Bootstrap方法的气路参数波动比阈值计算模型,对三轴燃气轮机0.8以及1.0工况下的低压涡轮出口温度T6进行故障预警研究,并与传统均值标准差阈值法进行预警结果对比。结果表明:该计算模型用于预警阈值计算的样本量更丰富、具有更高的可信度;其得到的预警阈值单值图,在燃气轮机与样本数据运行情况较为一致时可作为燃气轮机的固有属性,对于变工况故障预警及运行情况较为相近的燃气轮机故障预警同样适用;预警阈值偏差仅为-0.015%,相较于传统的动态阈值法减少了计算量。In view of the probelm that the traditional mean standard deviation threshold method cannot be applied to fault warning under variable working conditions,based on the performance simulation model of three-shaft gas turbine,a calculation model of gas path parameter fluctuation ratio threshold value by the Bootstrap method was proposed.With this calculation model,failure warning research was conducted on the low pressure turbine outlet temperature T,of three-shaft gas turbine under 0.8 and 1.0 working condi-tions,and the warning results were compared with the traditional mean standard deviation threshold meth-od.The results show that the calculation model has the following three advantages:the sample size for early warning threshold calculation is more abundant and has higher reliability;the single value diagram of early warning threshold obtained by the calculation model can be used as the inherent attribute of the gas turbine when the operation condition of the gas turbine is relatively consistent with the sample data.It is also applicable to the fault warning under variable working conditions and the fault early warning of gas turbines with similar operation conditions;the deviation of early warning threshold is only-0.015%,compared with the traditional dynamic threshold method,the calculation amount is reduced.

关 键 词：三轴燃气轮机 预警阈值 气路故障 BOOTSTRAP方法 气路参数波动比 

分 类 号：TK14[动力工程及工程热物理—热能工程]