电力系统中励磁保护功能的设计与实现

,,,(,300130):,:;;:TP272;TM761:A:100324897(2001)09200272031,,,AVR(),,:V/Hz;;P/QPT,,,[1],2V/HzV/Hz/,,U=4.44fN,f,U,,[2],,,V/HzAVR,1V/Hz,,REF-UMAX-fNOM,,REF-V/Hz-LIM,,REF-UMAX,,f-MACH-RELATIVEB,A(REF1+Q-DROOP)B,,DELAY-V/Hz-LIM,C1,,ON-V/Hz-LIM2ITER1,,REF2AB,,,1V/Hz3,,,(1.62.0)7220019RELAY299©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.(1020s),,,,,,,,,,,,,,,22,IE-REL,Iemax,Ieth,(),OUT-IE-LIM,IE-MAX-RETRIG,tup,tdown,Emax=(Iemax-0.9Ieth)23tup(),Iemax,Iemax-IE-REL,IemaxIE-RELAVR,,,IE-RELIemax,AVR,,,IE-REL=Iemax,(i=IE-REL-0.9Ieth)E=i2dt,E=Emax,IE--REL=Ieth,,IE-RELIethIemax,,,E=Emax,IE-RELIeth,,,,IE-RELIeth,tdown,E0,Iemax,,,IE-MAX-RETRIGIemax,,E0,EEmax,,4P/Q,,,,,,,,,,,P/Q,,P/Q3P/Q,P=0%P=25%P=50%P=75%P=100%,,,82©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.y=Q(P)-(1-uG2)/Xd,3P/Q,Q-REL,P-REL,OUT-Q-LIM,,AVR,5,PT,,,,PTPTPT,,PT,PT,AVR,PT,,(120%Ien),,,(20%Ien),,,,6CDWLZ,,:[1]YangYanjieetc.ADigitalExcitationControlSystemForSynchronousMachines.CICEM99,Xian.[2].[].:,2000.[3],,.().:,1991.:2001202221:(1966-),,,,DesignandrealizeofprotectionfunctionforgeneratorexcitationinpowersystemYANGYan-jie,LUJian-guo,YANGXu-dong,ANDong(ElectricalEquipmentFactory,HebeiUniversityofTechnology,Tianjin300130,China)Abstract:Inthispaper,adiscussionoftheprotectionandlimitfunctionsnecessaryforexcitationsystemisgiven,andthemethodstorealizethemindigitalexcitationequipmentaredescribed.Keywords:generator;excitation;protection(22)ApricingmechanismoftheelectricitymarketbasedonpowerflowtracingHOUYun2he,XIONGXin2gen,WUYao2wu(HuazhongUniversityofScience&Technology,Wuhan430074,China)Abstract:ThepowerindustryofChinaisgoingtoestablishamarket2basedoperationalmechanismwhichmakesafeatureofseparationofgenerationandtransmissionmanagement,competitionbeforesupplyingandopenaccess.Inelectricitymarketthepricingmechanismisanim2portantissue.Basedonthepowerflowtracing,apricingmechanismofreactiveandactivepowerispresentedinthispaper,whichconcernstheinterestofallsides.Satisfactoryresultsareobtainedusinga222bussystem.Keywords:electricitymarket;powerflowtracing;activepowerprice;reactivepowerprice9220019RELAY299©1995-2004TsinghuaTongfangOpticalDiscCo.,Ltd.Allrightsreserved.