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1、第47卷第12期热力发电Vol.47No.122018年12月THERMALPOWERGENERATIONDec.2018一种汽轮机抽汽发电变频调节方式1122郭天斌，刘勇，李欣，顾煜炯（1.国家电投集团东方新能源股份有限公司，河北石家庄050021；2.华北电力大学能源动力与机械工程学院，北京102206）［摘要］由于变频器改造后会引发低频发热及谐波等难题造成现场事故频发，本文提出了一套汽轮机抽汽发电变频调节系统改造方案。在该方案中，驱动汽轮机以中压缸排汽作为汽源，将主汽轮机负荷率75%作为其设计工况，同时配
2、备小发电机作为变频电源，取代传统的变频器装置，以此带动电厂内辅机的驱动电机，实现辅机变速运行。能效分析和经济效益分析结果表明，该方案节能潜力较大，而且系统管路相对简单，能有效地增加供电利润，提高经济效益，同时避免了变频器改造后引发的安全综合隐患。［关键词］火电机组；变频器；辅机节能；调峰；变频电源；驱动汽轮机；能效；经济效益［中图分类号］TK262［文献标识码］B［DOI编号］10.19666/j.rlfd.201809158［引用本文格式］郭天斌,刘勇,李欣,等.一种汽轮机抽汽发电变频调节方式[J].热力发电
3、,2018,47(12):141-145.GUOTianbin,LIUYong,LIXin,etal.Akindoffrequencyconversionregulationmodeofsteamextractionpowergenerationforsteamturbines[J].ThermalPowerGeneration,2018,47(12):141-145.Akindoffrequencyconversionregulationmodeofsteamextractionpowergeneration
4、forsteamturbinesGUOTianbin1,LIUYong1,LIXin2,GUYujiong2(1.SPICDongfangNewEnergyCorporation,Shijiazhuang050021,China;2.NorthChinaElectricPowerUniversity,Beijing102206,China)Abstract:Duetotheharmonicandlowfrequencyheatingproblemsoccurredaftertheinvertertransfor
5、mation,therearefrequentaccidentsonthesite.Forthisreason,aretrofittingschemeforfrequencyconversionsystemofsteamextractionpowergenerationofsteamturbineswasdesigned.Inthisscheme,thedrivesteamturbineusestheexhaustfrommediumpressurecylinderasthesteamsourceandtake
6、s75%ofthemainsteamturbineloadasthedesigncondition.Meanwhile,itisequippedwithasmallgeneratorasthefrequencyconversionpowersupply,whichreplacestheconventionalinverterdevice,soastodrivethedrivingmotoroftheauxiliariesinthepowerplantandrealizevariablespeedoperatio
7、noftheauxiliaries.Theenergyefficiencyanalysisandeconomicbenefitanalysisshowthat,thisschemehasgreatenergysavingpotential,andthesystempipelineisrelativelysimple,whichcaneffectivelyincreasetheprofitofpowersupplyandraisetheeconomicbenefit.Atthesametime,itavoidst
8、hecomprehensivehiddendangersofsafetycausedbytheinvertertransformation.Keywords:thermalpowerunit,frequencyconverter,energysavinginauxiliarymachine,peakadjustment,variable-frequencypowersources,dr
