大型汽轮发电机组油膜失稳故障诊断规则研究  

Oil-film Instability Fault Diagnosis Rule for Large Turbine-generator Unit

作　　者：张煜[1] 王向志[2] 谢骐宇[2] 崔蕾 张云河 

机构地区：[1]国核电力规划设计研究院,北京100095 [2]华北电力大学能源动力与机械工程学院,北京102206 [3]国核(北京)科学技术研究院,北京100029 [4]辽宁东方发电有限公司,辽宁抚顺113008

出　　处：《华东电力》2012年第11期2054-2058,共5页East China Electric Power

基　　金：国家自然科学基金项目(51075146)~~

摘　　要：针对诊断汽轮发电机组油膜失稳故障特征信息的冗余和重要度的不同,通过采用粗糙集属性约简方法得到油膜失稳故障诊断规则。该方法通过对汽轮发电机组油膜失稳故障(油膜涡动和油膜振荡)特征参数进行模糊化及离散化处理,构建故障决策表并进行约简,去除不重要的信息,提取诊断油膜失稳故障的规则。实例表明,此方法能有效诊断出油膜失稳故障。In view of the problems in turbine oil-film instability fault diagnosis, such as characteristic information redundancy and focus deviation, this paper proposed a diagnosis method for attribute reduction by rough sets. Thereby the characteristic parameters of turbine oil-film instability faults （ oil whirl or oil whip） were discretized and fuzzed treatment; fault decision table is formulated to simplify the diagnosis process; redundant information is removed; finally the oil-film instability fault diagnosis rule is generalized. A practical example has been proved that the method can diagnose oil-film instatility fault effectively.

关 键 词：油膜振荡 粗糙集 正域 诊断规则 油膜涡动 

分 类 号：TK263[动力工程及工程热物理—动力机械及工程] TH133.2[机械工程—机械制造及自动化]