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1、第42卷第11期電力系統(tǒng)保護與控制Vb1.42NO.112014年6月1日PowerSystemProtectionandControlJun.1.2014特付高同壓交義直電網(wǎng)協(xié)調(diào)電壓控制策略及仿真研究陳江瀾,張蓓,蘭強,李建,路軼,茍曉毅。,肖嵐,王彬,郭慶來,孫宏斌(1。清華大學電機系電力系統(tǒng)國家重點實驗室,北京100084;2.四川省電力公司調(diào)度控制中心,四川成都6100413.四川省電力公司信息通信公司,四川成都610041)摘要:特高壓交直流混合電網(wǎng)的電壓運行特性對AVC系統(tǒng)的建設(shè)提出了新的需求。首先分析了AVE系統(tǒng)
2、需應(yīng)對的當交直流系流統(tǒng)分日別比發(fā)生不同時間常數(shù)擾動后的四種工況,提出了增加直流換流站母線協(xié)調(diào)電壓約束、自適應(yīng)地調(diào)整AVC系統(tǒng)中母線電壓限值、調(diào)節(jié)優(yōu)化計算的時刻以及控制目標等手段的協(xié)調(diào)控制策略?;贏VC仿真平臺和IEEE39節(jié)點標準算例系統(tǒng)的連續(xù)仿真,△通口過比較當交流和直流系統(tǒng)分別發(fā)生方式變更時,采用協(xié)調(diào)策略前后的系統(tǒng)響應(yīng),驗證了協(xié)調(diào)策略可以減少無功補償設(shè)備不合理的投切。提出的協(xié)調(diào)策略將在四川電網(wǎng)得以實際應(yīng)用。關(guān)鍵詞:協(xié)調(diào)控制;特高壓直流;自動電壓控制;仿真平臺;四川電網(wǎng)Researchonstrategyandsimula
3、tionofcoordinatedautomaticvoltagecontrolf0rUHVDC/AChybridgridCHENJiang.1an,ZHANGPei,LANQiang,LIJian2,LUYi,GOUXiao—yi。,XIAOLan,WANGBin,GUOQing—lai,SUNHong—bin(1.StateKeyLabofPowerSystems,DepartmentofElectricalEngineering,TsinghuaUniversity,Beijing100084,China2.Dispat
4、chingandControlCenterofSichuanGrid,Chengdu610041,China;3.InformationandCommunicationCompanyofSichuanGrid,Chengdu610041,China)Abstract:ThecharacteristicsoftheUHVDC
5、ChybridgridhaveputforwardnewdemandsontheconstructionofcsysternThispaperfirstlyanalyzesfotitoperatingmod
6、eswhichAVCsystemneedstocopewithwhenthedisturbancesOccurintheACgirdandtheUHVDCgridrespectivelywithdiferenttimeconstants.Accordingtothat.thecoordinatedcontrolstrategYincludingaddingthecoordinatedbusvoltageconstraintsoftheconverterstation,adaptivelyrefreshingthevoltage
7、constraintsintheAVCsystem.a(chǎn)djustingtheoptimalcontro1calculationtimeaswel1ascontrolobiectivesiSgiven.OnbasisofthecontinuousA、廠CsimulationsonstandardIEEE39examplesystemandbycomparingthesystemresponsebeforeandafterthecoordinatedstrategyiSadoptedwhentheACandUHVDCgrids’o
8、perationmodeshavechanged.thecoordinatedcontroIstrategYwilIreducetheunreasonableswitchingtimesofVarcompensationequipmentisverified.TheproposedcoordinatedcontrolstrategywillbeappliedinSichuangrid.ThisworkissupportedbyNationalProgramonKeyBasicResearchProject(973Program
9、)(No.2013cB228203),NationalScienceFundforDistinguishedYoungScholars(No.51025725).a(chǎn)ndNationalNaturalScienceFoundationofChina(No.51277105).K