ZhejiangElectricPower第42卷第2期2023年2月Vol.42，No.02Feb.25.2023基于断路器支路故障电流的短路电流评估方法董炜1，华文1，申屠磊璇1，周靖皓2，王龙飞1，王博文1（1.国网浙江省电力有限公司电力科学研究院，杭州310014；2.国网浙江省电力有限公司，杭州310007）摘要：随着负荷快速增长，电网密度不断提升，短路电流超标问题日益严重，精确评估系统短路电流水平对保障电网的安全稳定运行至关重要。对此，提出一种基于断路器支路故障电流的短路电流评估方法。针对220kV及以下电压等级双母双分段接线变电站和500kV3/2接线变电站，分析不同故障位置、断路器拉停等情况下流过断路器的短路电流，并提出线路出口单相故障单跳单重阶段断路器所需遮断短路电流的计算方法，明确了变电站内断路器所需遮断最大短路电流，将短路电流校核标准精准化到故障后流过各断路器的最大短路电流不超过其遮断能力。最后通过算例分析验证了所提评估方法的有效性。关键词：短路电流；断路器支路；双母双分段接线；3/2接线；单相重合闸DOI:10.19585/j.zjdl.202302004开放科学（资源服务）标识码（OSID）：AshortcircuitcurrentevaluationmethodbasedonthebranchfaultcurrentofthecircuitbreakerDONGWei1，HUAWen1，SHENTULeixuan1，ZHOUJinghao2，WANGLongfei1，WANGBowen1（1.StateGridZhejiangElectricPowerCo.，Ltd.ResearchInstitute，Hangzhou310014，China；2.StateGridZhejiangElectricPowerCo.，Ltd.，Hangzhou310007，China）Abstract:Withtherapidloadgrowthandtheincreasingdensityofpowergrids，theoverrunshort-circuitcurrentbe⁃comesincreasinglyaggravated.Toaccuratelyassesstheshort-circuitcurrentlevelofthesystemiscrucialtoensurethesafeandstableoperationofthepowergrid.Therefore，ashort-circuitcurrentevaluationmethodbasedonthebranchfaultcurrentofthecircuitbreakerisproposed.Inviewofthedouble-busdouble-sectionwiringsubstationsatvoltagelevelsof220kVandbelowand500kVthree-to-twowiresubstations，thepaperanalyzestheshortcircuitcurrentflowingthroughthecircuitbreakerincaseofdifferentfaultlocations，switch-offofcircuitbreakers，etc.Moreover，itproposesacalculationmethodoftheshortcircuitcurrentthatthecircuitbreakerrequiresinthesingle-jumpsingle-weightstageofsingle-phasefaultoccurringatthelineoutletanddet...
