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时间:2020-03-28
《模糊变权法在绝缘子状态综合评判中的应用.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第22卷第1期电力系统及其自动化学报V01.22N0.12010年2月ProceedingsoftheCSU-EPSAFeb.2O1O模糊变权法在绝缘子状态综合评判中的应用熊兰,刘钰,林荫宇,姚树友。,何为,汪金刚(1.重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400030;2.重庆市电力公司城区供电局,重庆402760;3.重庆市电力公司璧山供电局,璧山402760)摘要:鉴于在线监测污闪报警的复杂性,单一以紫外脉冲数为报警参数有一定的局限性,针对绝缘子的状态评估中需考虑多因素且具有模糊性和随机性的特点,提出将模糊综合评判的方法应用
2、于绝缘子状态评估的多级模糊综合评判方法。通过分析影响绝缘子状态主要方面的特征参量,建立层次型评估指标体系;在用层次分析法确定指标的常权的基础上,引入基于均衡函数的变权模式,综合考虑指标间的均衡性,对常权进行修正并得到变权;最后利用模糊理论确定单因素的各状态等级的隶属度,并基于多级模糊评判的算法进行模糊运算,综合得出了绝缘子状态。通过实例比较变权与常权模糊评判的结果表明,变权综合比常权更合适更客观的反映了绝缘子的真实运行状态。关键词:模糊综合评判;变权;状态评估;绝缘子中图分类号:TM855文献标志码:A文章编号:1003—8930(2010)01—
3、0096—05ApplicationofFuzzySyntheticMethodonInsulatorConditionAssessmentXIONGLan,LIUYu,LINYin—yu,YAOShu—you。,HEWei,WANGJin—gang(1.StateKeyLaboratoryofPowerTransmissionEquipments&SystemSecurityandNewTechnology,ChongqingUniversity,Chongqing400030,China2.CiryPowerSupplyofChongqingE
4、lectricPowerCompany,Chongqing400014,China;3.BishanPowerSupplyofChongqingElectricPowerCompany,Bishan402760,China)Abstract:Inviewofthecomplexityofon-linemonitoringflashoverwarningsystem,systemonlywithultravio一1etpulseshassomelimitation.Aimingatthefeaturethatinsulatorconditionass
5、essmentsystemneedstObeconsideredformultifactorandhasfuzzinessandrandomicity,afuzzysyntheticassessmentmethodwithvaria—bleweightswasintroduced.Throughanalyzingthevariablesaffectingoninsulatorcondition,alayeredassess—mentindicessystemforinsulatorconditionassessmentwasbuilt.First,
6、theAHPmethodwasusedtodeter—minetheconstantweightofeveryindices,thenthevariableweightmodelwasintroducedbasedonbalancedfunction,inwhichtheconstantweightswasmodifiedtOgetthevariableweights,ThenthefuzzysettheorywasappliedtOdeterminethemembershipdegreeofasingleindex,andbasedontheid
7、eaofmutli—gradefuzzyassessment,theconditionofeverygradewasvaluatedtogetthecomprehensivestatusofinsulator.Bycompa—ringthefuzzysyntheticevaluationbasedonconstantweightswiththatbasedonvariableweighs,theexampleshowsthattheconditionassessmentforinsulatorusingvariableweightsbasedonb
8、alancedfunctionismorereasonableandmoreobjective.Keywords:fuzz
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