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1、隔离刀闸分支线路弧光接地装置在3-35kv电力系统中，用电设备一般都是旋转电机居多，如果不分稳定弧光接地故障和短暂接地故障而直接令接触器单相直接接地变为金属性接地会引起保护差动跳闸，这样会造成停机，不利于生产。装置能区分出短暂的弧光接地故障和长期稳定的弧光接地故障，避免了不必要的麻烦。In3-35kvpowersystem,powerequipmentisusuallyarotarymotor,ifbothstablearcgroundingfaultandshort,directthecontactorsingle-phaseearthfaultandgrounding
2、intogoldattributewilldirectlycausethedifferentialprotectiontrip,thiswillcausedowntime,isnotconducivetoproduction.Devicecandistinguishbetweentheshortarcgroundingfaultandlong-termstabilityofthearcgroundingfault,toavoidtheunnecessarytrouble.系统发生谐振时，微机控制器根据谐振类型进行不同的消谐：如果系统发生的谐振是分频谐振，微机控制器瞬间短接
3、pt的开口三角绕组，破坏谐振参数，消除谐振。如果系统发生的谐振是工频或高频谐振，微机控制器在pt的开口三角绕组接入大功率消谐电阻进行消谐。Systemresonanceoccurs,themicrocomputercontrolleraccordingtodifferenttypesofresonantharmonicelimination:ifthesystemresonancefrequencyresonance,microcomputercontrollerinstantaneousshortaftertheopendeltawindingofpt,destroyt
4、heresonanceparameters,eliminatingharmonic.Ifthesystemispowerfrequencyorhighfrequencyresonant,microcomputercontrollerinpttheopendeltawindingisconnectedtothepowerharmoniceliminationresistorforharmonicelimination.如果接地故障是不稳定的间歇性弧光接地，则微机控制器判断接地的相别，同时发出指令使故障相的真空接触器闭合，投入高能限压器，限制故障相的弧道恢复电压，吸收接地引起
5、的电磁能量，减缓系统振荡，使弧道的介质恢复抗电强度ujf大于弧道恢复电压uhf。Ifearthfaultisunstableintermittentarcgrounding,themicrocomputercontrollerdon'tjudgegrounding,andissuingcommandsmakefaultphase,vacuumcontactorisclosedintohighpressurelimitingdevice,restrictarcwayrecoveryvoltageoffaultphase,absorptionofgroundcausedbyt
6、heelectromagneticenergy,slowdownthesystemoscillation,restoringthearc,mediumresistancetoelectricintensityujfrecoveryvoltageisgreaterthanthearcroad,uhf.使恢复电压无法再次击穿故障点，从而完成消弧。数秒后，令故障相的高压真空接触器断开，如果是短暂的弧光接地，系统恢复正常运行；如果接地故障时稳定的弧光接地，矿用网片控制器令故障相和接地的高压真空接触器kd同时闭合，使系统由稳定的弧光接地故障快速转变成稳定的金属性接地，装置认定此故障
7、为永久性电弧接地故障，等待值班人员或微机选线装置处理。Therecoveryvoltagebreakdownpointoffailure,can'tagaintocompletethearcsuppression.Afterafewseconds,makethefaultphaseofhighvoltagevacuumcontactordisconnect,ifitisashortarcgrounding,systembacktonormaloperation;Ifstabilitywhenthegroundfaultarcg
