基于电能质量多指标的动态事件检测方法

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中图分类号：TM743 文献标志码：A 文章编号：2095-2945（2025）25-0136-05

Abstract：Atpresent，powerqualitysteady-stateeventsaremainlydetectedthroughthefixedlimitsofthenationalstandard. However，moreandmoresystemshaveshownthecharacteristicsofahighproportionofnewenergyaccess，andhigh-order harmonicscannotbeignored.Thenationalstandardhasnotyetgiven26ormoreharmoniccrosings；Atthesametime，power qualityindicatorsmaybeinastateofexceedingthelimitforalongtime.Whentherangeofexceedingthelimitchanges significantlyitisdificultforthefixedlimitmethodtocapturethechangecharacteristics.Inordertosolvetheaboveproblems， thispaperproposesamulti-indicatordynamiceventdetectionmethodforpowerqualitythatdoesnotrelyonfixedlimits.First， frst-orderlinearregresionisusedtofindpseudoabnoraldataforasingleindicatorofpowerqualityandtheabnoaldata isfurthedeterminedbasedonthecorrelationofmultipleindicatorsofpowerquality；subsequently，eachpowerqualitystate changeiscapturedbasedonDBSCAN，andthenmulti-indicatorcorelationisusedtodeterminethevalidityofpowerquality events;finally，the accuracyandreliabilityof the proposedmethodareverifiedbytwopracticalengineering data.

Keywords： power quality;dynamic events; multiple indicators; data cleaning; DBSCAN

构建新型电力系统是实现“双碳”战略目标的重要举措，也是我国能源转型的关键[1-3]。（剩余4615字）