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1、第39卷第5期電力系統(tǒng)保護與控制Vbl-39NO.52011年3月1日PowerSystemProtectionandContro1MaL1。2011考慮暫態(tài)電壓安全的STATCOM安裝地點選擇和容量優(yōu)化李海琛,劉明波,林舜江(華南理工大學電力學院,廣東省綠色能源技術重點實驗室,廣東廣州510640)摘要:建立考慮多故障暫態(tài)電壓安全的靜止同步補償器(STATCOM)安裝地點和容量優(yōu)化的數(shù)學模型。通過特定故障后系統(tǒng)母線電壓恢復到0.75pu以上的時間確定敏感母線,綜合考慮敏感母線和系統(tǒng)區(qū)域平衡確定STATCOM的安裝
2、地點。STATCOM容量優(yōu)化模型以多臺STATCOM容量之和最小為目標,以故障切除后1S母線電壓恢復值不低于0.75pu作為系統(tǒng)暫態(tài)電壓安全約束,通過計算節(jié)點電壓分別對于各臺STATCOM容量的軌跡靈敏度,將暫態(tài)電壓安全約束轉(zhuǎn)化為關于STATCOM容量的線性不等式約束,進而采用線性規(guī)劃方法可解出滿足多個故障下系統(tǒng)暫態(tài)電壓安全要求的STATCOM容量。最后,通過IEEE9節(jié)點和39節(jié)點系統(tǒng)的仿真計算驗證了所提出STATCOM安裝地點和容量優(yōu)化方法的正確性。關鍵詞:暫態(tài)電壓安全;靜止同步補償器;軌跡靈敏度;線性規(guī)劃Se
3、lectionofSTATCOM’sinstallationsiteandcapacityoptimizationconsideringtransientvoltagesecurityLIHai—chen,LIUMing-bo,LINShun~iang(SchoolofElectricPowerEngineering,SouthChinaUniversityofTechnology,GuangdongKeyLaboratoryofCleanEnergyTechnology,Guangzhou510640,C~na)
4、AbstraetzThemathematicalmodelforinstallingsitesandoptimalcapacityofSTATCOMconsideringtransientvoltagesecurityundermulti—faultsisestablished.Bythetimethatthevoltagemagnitudeofsystemrecoversto0.75pu,wecallascertainsensitivebuses,thenascertaininstallingsitesofSTA
5、TCOMconsideringbothsensitivebusandregionbalanceofsystem.IntheoptimizationprocessofSTATCOMcapacity,wetreattheminimumoftotalcapacityofSTATCOMasobjectivefunction.Theconstraintoftransientvoltagesecurityisthatthemagnitudeofbusvoltagesisnotlessthan0.75puwithinonesec
6、ondafterthefaultiscleared.BycalculatingthetrajectorysensitivityofthemagnitudeofbusvoltagestothecapacityofeachSTATCOM,thetransientvoltagesecurityconstraintsaretransformedintolinearinequalityconstraintsofthecapacityofSTATCOM,thentheoptimalcapacityofSTATCOMcanbeg
7、ainedbythewayofsolvinglinearprogrammingmodel,whichissuitablefortransientvoltagesecurityundermulti—faults.ThroughtheinstanceofIEEE9-busand39一bussystems,thermionalityoftheoptimizationmodelandalgorithmareverified.ThisworkissupportedbyNationalNaturalScienceFoundat
8、ionofChina(NSFC)(No.5077702I1.Keywords:transientvoltagesecurity;STATCOM;trajectorysensitivity;linearprogramming中圖分類號:TM712文獻標識碼:A文章編號:1674—3415(2011)05.0069.08電動機吸收的無功功率增大,進一步加劇負荷母