二普線串補對四川500kV電網(wǎng)運行特性影響的研究.pdf

1、重慶大學碩士學位論文二普線串補對四川500kV電網(wǎng)運行特性影響的研究姓名：張云申請學位級別：碩士專業(yè)：電氣工程指導教師：牟道槐龐曉艷20040420重慶犬學二[程硬士學位論文英文摘要AbstractWiththedevelopingandexpandingofPowerSystemthelengthandtransmittingpowerofthetransmissionanddistributionlinealealsoincreas

2、ing，Soforthemedialandlowvoltageelectricalnetworks，thevoltagequalityalwayscannotbesatisfiedwithusers’needsbecauseoftheincreaseofthelineimpedanceandtransmissionpower；Forthehi【ghvoltageandlongdistancelinethetransmissioncapa

3、cityoflinesisalwaysaffectedbythelimitofsmticstabilizationanddynamicstabilizationInordertodevelopPowerSystemmole，fasterbetterandeconomicallyusingseriescapacitancetocompensatelines’impedanceisaeffectivemeasureofimprovingvo

4、ltagequalityandtransfercapacitySeriescompensationisdMdedintofixedseriescompensationandcontrolledseriescompensationThelaterbelongstoFACTSInACtransmissionsystem，usingseriescapacitance’capacitiveimpedancetocompensatelines’i

5、mpedancetoshortenelectricaldistanceofdifferentgeneratorsincreasethesynchronousmo／lqentimprovethestabilityofPowerSystem，reducevoltagedecreasingandrelativepowerangles。]herebyimprovingstablelevelofPowerSystem，increasingtran

6、smissioncapacityoftransmissionlineandimprovingelectricalnetworks’actualtransmissionabilityThecontrolledserieshasainductancecircuit，whichiscontrolledbythyristorvalve，isinserieswithseriescapacitysoitproduceamanipulativeadd

7、itivecurrent，achievingthecontrolofequivalentcapacitive—reactanceofseriescompensationcapacitance；namelyadjustseriescompensationcapacitancesmoothlyandcontroldynamicresponsethroughcontrollingthyfistorvalve’striggerangle。Usi

8、ngcontrolledseriescompensationcanfartherimprovethetransmissionabilityofelectricalnetworksandthestabilityofPowerSystem，restrainlowfiequencyoscillationandsubsynchronousresonance。Ertanhydroelectricplantisthebiggesthydroelec

9、tricplantstationof20centuryinourcountrythecapacityofallthegeneratoris3300MWTheleastelectricalpoweris1000MWThegrosselectricalpowerofayearis17billonkW，hButErtanhydroelectricplantisfarawayfromSichuanmainnetwork。Theflowwhich

10、istransmittedfromErtanhydroelectricplantintomainnetworkisclosetotheline’ssinglephasepermanencestablelimitTherefore，theline’santijammingabilityispoorItisverydifficulttowidentransmissionpassagewayfromErtantoZhaojueInordert