MMC电气设备匝间短路故障时电气参数仿真分析

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中图分类号： TP391.9 文献标志码：B 文章编号：1671-5276（2025）06-0141-04

Abstract：Modularmultilevelconverter（MMC），asacommonelectricalequipment，itsperformanceafectstheefciencyof power generation.For MMC electricalequipment with CKGKL-50/10-5%parameters，theturnto turnmodel of multilevel converterwasbuiltbyfiniteelement softwareComsol tocalculatecoilinductanceandcurrentdata，andtheequivalentreactance， losscoeficientand powercoeficientof multilevelconverterwere measured.Theresultsshow thatthe inductanceandcurrent obtainedbythefiniteelementmethodandtheanalyticalmethodareingoodagreement，andtheaccuracyofextrapolatingthe finiteelementsimulationmodelisveryhigh.Whenthemultilevelconverterturnsshortcircuit，theequivalentreactanceand impedance are smaller，corresponding to the equivalent reactance change rate of -0.12% to -1.76% ，and the equivalent impedance change rate of -0.11% to -1.41% .As the short circuit area extends from the inner to the outer layer，the multilevel converterparameter gainsalargerabsolutevalue.Thisresearchcancompletethe procesofon-linemonitoringof interturnshort circuit fault，so as to efectively guarantee the operation safety of multilevel converter.

Keywords：multilevel converter； interturn short circuit；loss factor;power factor；parameter analysis

0 引言

随着电力设备运行获得更高感性负荷后，需进一步提升无功需求。（剩余4038字）