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时间:2020-03-28
《基于纵横维度的光伏阵列群体类比状态评估方法研究.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44卷第11期电力系统保护与控制Vl01.44NO.112016年6月1日PowerSystemProtectionandControlJun.1,2016D0I:10.7667/PSPC151188基于纵横维度的光伏阵列群体类比状态评估方法研究王景丹,龚晓伟,霍富强,牛高远,葛琪,王留送,苏战辉(许继集团有限公司,河南许昌461000)摘要:针对光伏阵列状态评估中指标选取维度较窄,异常状态及原因判定误差较大的问题,提出一种基于纵横维度的光伏阵列群体类比状态评估方法。将光伏阵列状态评估特征参量按照递阶层次结构划分,定义时间序列节点和光伏
2、阵列监测点。从横向角度构造基于正负理想点评估法的光伏阵列运行状态评估模型,得出某项评估指标在不同光伏阵列单元中的最佳距离度。从纵向角度利用高斯曲线拟合法构造最佳距离度与评估指标的时间函数关系,得出光伏阵列群体运行状态曲线。从而准确识别异常阵列及对应异常指标,并及时给出预警,为光伏阵列运维提供决策依据。结合实际工程的光伏数据验证该方法,结果表明,该方法能够准确反映光伏阵列的实时运行状态,具有一定的应用价值。关键词:光伏阵列;纵横维度;状态评估;时间序列;投影矩阵Researchongroupanalogystateevaluationmet
3、hodofphotovoltaicarraybasedontheverticalandhorizontaldimensionsWANGJingdan,GONGXiaowei,HUOFuqiang,NIUGaoyuan,GEQi,WANGLiusong,SUZhanhui(xJGroupCorporation,Xuchang461000,China)Abstract:Inphotovoltaicarraystateestimation,thedimensionalityofindicatorselectedisnarowandwilllea
4、dtobigerorinthejudgmentofabnormalstateandreason,therefore,thispaperproposesonekindofstateevaluationmethodforPVarraysbasedontheverticalandhorizontaldimensions.ThemethoddividesthecharacteristicsparametersofPVarrayinaccordancewithhierarchystructureanddefinestimesequencenodes
5、andmonitoringpointsofPVarray.Fromthehorizontalangle,itconstructsevaluationmodelofrunningstatusofPVaraybasedontheevaluationschemeofpositiveandnegativeidealpoint,andthenobtainsthebestdistancedegreesofanindicatorindiferentPVarrayunit.Afterwards,itusestheGausscurvefittingtost
6、ructurethefunctionrelationsoftimebetweenthebestdistancedegreesandevaluationindexfromtheverticalangle,andthenacquiresthegroupofrunningstatecurveofPVarrays.Thereby,itefectivelyidentifiestheabnormalarrayandrelevantindicators,giveswarningtimely,andprovidesdecisionbasisforoper
7、ationandmaintenanceofPVarray.Itverifiestheassessmentmethodcombinedwithsolardataofpracticalengineering,experimentalresultsshowthatthemethodCanaccuratelyreflecttheactualrunningconditionofPVaray,andhasacertainapplicationvalue.Keywords:photovoltaicarray;verticalandhorizontald
8、imensions;stateevaluation;timesequence;projectionmatrix长时问高效率发电水平,因此,对光伏阵列进行实0引言时有效状态监测与评估显得十分重要
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