文档名：气体间隙开关喷射等离子体触发性能劣化及剩余触发寿命预测研究
摘要：喷射等离子体诱导型气体间隙开关用于电力系统过电压防护具有明显优势,但高注入触发能量下多次放电累积效应引起的触发失效问题严重,极限可触发次数具有不确定性,亟须开展触发寿命与触发有效参数的关联规律以及剩余触发寿命预测研究.为此该文搭建了气体间隙开关触发寿命研究平台.结果表明,低容值触发电路可迅速建立触发放电主通道,电弧电流可达3.7kA;高容值触发电路提高了用于解离产气材料而形成喷射等离子体的能量,显著提升了触发腔等离子体喷射触发能力.触发回路电容C1距C2放电时延Δt0、击穿时延Δt1、触通时延Δt2可分别用于表征触发一级腔、二级腔、气体开关导通性能的劣化程度,其变化过程可用于表征气体开关触发失效的阈值范围.以等离子体喷射高度作为预测因子,建立了气体开关剩余触发寿命预测模型ARIMA(1,1,2),预测值与试验结果基本吻合,剩余触发寿命预测误差在10%以内.研究结果可为气体间隙开关实现稳定触通及触发寿命预测提供理论参考和工程应用指导.
Abstract：ThecumulativeeffectofmultipledischargesathighinjectedtriggerenergycausesaseriousproblemoftriggerfailureofthePlasma-Jet-Triggeredgasgapswitch.Inordertoachievestabletriggeringconductionofthegasswitch,theexperimentoftheinfluenceoftheinjectionenergyrateontheplasmainjectioncharacteristicsandthestudyofthedegradationofthegasswitchtriggeringperformanceunderrepeatedtriggeringwerecarriedouttbasedonthegasswitchtriggerliferesearchplatform.Finally,aresidualtriggerlifepredictionmodelwasestablishedtopredictthegasswitchtriggerlifebasedonthelawofgradualchangeofthetriggercharacteristicparameters.Theresultsareasfollows:(1)Theenergyreleaserateisfastunderthe40μFcapacitivedischargecircuit,thehigh-temperatureablationenvironmentisinstantlyestablished,andtheplasmajetisrapidlyformedandejectedfromthecavity,butthemainchannelarccurrentactsonthetriggerchannelforashortperiodoftime,thegas-producingmaterialisnotfullyablated,thegasmoleculesintheferryvaporlayerarenotcompletelydissociatedtoformplasma,theconductivityoftheplasmajetislow,andtheaerodynamicforceoftheplasmajetaccumulatedintheshortablationtimeisinsufficient,sotheplasmajetdurationandcharacteristicparametersarereduced,andthegasswitchtouch-oncannotbeinduced.Underthe240μFhigh-capacitytriggercircuit,thearcablationtimeisextendedby1.3timesandtheenergyusedfordissociationtoformplasmaisincreasedby24.4%,whichsignificantlyimprovestheplasmajetparameters(jetarea,height,velocity,etc.)andenablesstabletriggerconductionofthegasgapswitchatalowerjetheight.(2)Underrepeatedtriggering,theablationproductsontheinnerwallofthefirstcavityaccumulate,thesurfaceroughnessincreases,thedischargepathgraduallydeteriorates,resultinginthegradualdeteriorationofthetriggeringdischargeperformanceofthefirstcavity,andthedischargetimedelayΔt0betweencapacitorsC1andC2increases.Undertheeffectofintenseablationalongthesurfacearccurrent,thediameterofthesecondcavitynozzlegraduallyincreases,thepressuredifferencebetweentheinsideandoutsideofthetriggercavitynozzledecreases,andthecumulativeeffectoftheinsulationmaterialgasproductioncapacityandarcenergyutilizationdecreases,whichleadstoadecreaseintheplasmajetcharacteristicsparameters,causingaweakeningofthedistortioneffectofthebackgroundelectricfieldofthemaingapoftheswitch,resultinginanincreaseinthebreakdowntimedelayΔt1.Bytheendofthetriggerlife,breakdowndelayΔt1andon-timedelayΔt2increasedby0.67and1.1times,respectively.Andthediameterofthefirstandsecondtriggercavitynozzlesincreasedtonearly1.9and2.3times,respectively.Δt0,Δt1,Δt2canbeusedtocharacterizethedegreeofdeteriorationofthetriggerfirstcavity,secondcavity,andconductionperformance,respectively.Inpracticalapplications,thethresholdrangeinwhichtheabovecharacteristicquantitieschangecanbedetectedtodeterminethesuperiorityofthegasswitchtriggeringperformanceandthetriggerlifestage.(3)Basedonthestrongcorrelationlawbetweenplasmajetheightandgasswitchtriggerperformancedegradation,theplasmajetheightisusedasthepredictor.ThegasswitchtriggerlifepredictionmodelARIMA(1,1,2)wasestablishedafterADFtest,ACFandPACFparametersidentification,theinformationcriterionjudgmentandsignificancetest.Thenumberofremainingtriggerlifepredictionsforthemodelis398.Thepredictedvaluesarebasicallyconsistentwiththeexperimentalresults,andtheremainingtriggerlifepredictionerroriswithin10%,whichcanwellmeettherequirementsofgasswitchtriggerlifeprediction.
作者：董冰冰 郭志远Author：DongBingbing GuoZhiyuan
作者单位：合肥工业大学电气与自动化工程学院合肥230009
刊名：电工技术学报
Journal：TransactionsofChinaElectrotechnicalSociety
年，卷(期)：2024, 39(5)
分类号：TM470
关键词：气体间隙开关 等离子体喷射 触发失效 寿命预测 过电压与接地
Keywords：Gasgapswitch plasmajet triggerfailure lifeprediction overvoltageandgrounding
机标分类号：TM564TM86TM743
在线出版日期：2024年3月19日
基金项目：国家自然科学基金，中央高校基本科研业务费专项，高等学校学科创新引智计划资助项目气体间隙开关喷射等离子体触发性能劣化及剩余触发寿命预测研究[
期刊论文] 电工技术学报--2024, 39(5)董冰冰 郭志远喷射等离子体诱导型气体间隙开关用于电力系统过电压防护具有明显优势,但高注入触发能量下多次放电累积效应引起的触发失效问题严重,极限可触发次数具有不确定性,亟须开展触发寿命与触发有效参数的关联规律以及剩余触发...参考文献和引证文献
参考文献
引证文献
本文读者也读过
相似文献
相关博文
气体间隙开关喷射等离子体触发性能劣化及剩余触发寿命预测研究 Study on Triggering Performance Degradation and Remaining Trigger Life Prediction of Gas Gap Switch Jet Plasma
气体间隙开关喷射等离子体触发性能劣化及剩余触发寿命预测研究.pdf
- 文件大小:
- 1.6 MB
- 下载次数:
- 60
-
高速下载
|
|
