电气工程专业英语分析解析课件.ppt

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1、电气工程及其自动化专业英语主讲：武米仙制作：武米仙张宇慧指导:王锋班级：130302454.5PowerSystemStabilityperturbationn.扰动，摄动，不安，扰乱dampvt.使潮湿，使阻尼，抑制vi.减幅，阻尼，变潮湿n.潮湿，湿气，adj.潮湿的fluctuationn.起伏，波动interconnectionn.相互连接undergovt.经历，经受，忍受criterionn.标准，规范，准据tripout断开，短路，停机asymptoticadj.渐进（线）的oscillatoryad

2、j.震荡的，动摇的inherentadj.固有的，内在的quiescentadj.静止的，不活动的，沉寂的vitallyadv.极其，紧要的，生死攸关的Thetransientfollowingasystemperturbation（系统受到干扰后）isoscillatoryinnature;butifthesystemisstable,theseoscillationswillbedampedtowardanewquiescentoperatingcondition.Theseoscillations,howev

3、er,arereflectedasfluctuationsinthepowerflowoverthetransmissionlines.Ifacertainlineconnectingtowgroupsofmachinesundergoesexcessivepowerfluctuations,itmaybetrippedoutby（被断开）itsprotectiveequipmenttherebydisconnectingthetowgroupsofmachines..Thisproblemistermed（显示）

4、thestabilityofthetieline,eventhoughinreality（实际上）itreflectsthestabilityofthetwogroupsofmachines.Astatementdeclaringapowersystemtobe“stable”isratherambiguousunlesstheconditionsunderwhichthisstabilityhasbeenexaminedareclearlystated.Note：①一个电力系统是“稳定的”这种表述是比较模糊的，除

5、非能清楚地描述检测稳定性的条件。Thisincludestheoperatingconditionsaswellas（与..一样）thetypeofperturbationgiventothesystem.Thesamethingcanbesaidabouttie-linestability.Note：②这包括系统的运行状况以及受到的干扰形式。连接线的稳定性也可以这么描述。Sinceweareconcernedherewith（关心）thetheimpactstowhichitissubjected.Note：①这

6、里我们关心的是线路跳闸，系统所能承受的功率波动取决于系统的初始运行状况，包括线路载荷以及它所受到的冲击的性质。Thesequestionshavebecomevitallyimportantwiththeadventof（随着..出现）large-scaleinterconnections.trippingoftheline,thepowerfluctuationthatcanbetolerateddependsontheinitialoperatingconditionofthesystem,includingt

7、helineloadingandthenatureofInfact,asevere（butimprobable)disturbancecanalwaysbefoundthatwillcauseinstability.Therefore,thedisturbancesforwhichthesystemshouldbedesignedtomaintainstabilitymustbedeliberatelyselected.Note：因此，必须慎重地选择能让系统保持稳定运行的干扰。Havingintroducedthe

8、term“stabilitya,”wenowproposeasimplenonmathematicaldefinitionofthetermthatwillbesatisfactoryfor（对..适宜）elementaryproblems.Infact,aseverebutimprobabledisturbancecanalwaysbefoundthatw