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1、2007年11月電工技術(shù)學報Vol.22No.11第22卷第11期TRANSACTIONSOFCHINAELECTROTECHNICALSOCIETYNov.2007用STATCOM提高風電場暫態(tài)電壓穩(wěn)定性范高鋒遲永寧趙海翔王偉勝戴慧珠(中國電力科學研究院北京100085)摘要研究了用STATCOM改善基于定轉(zhuǎn)速風電機組和基于轉(zhuǎn)子電阻可調(diào)的繞線式發(fā)電機風電場的暫態(tài)電壓穩(wěn)定性。分析了異步電機電壓暫態(tài)穩(wěn)定性的機理。在DIgSILENT/PowerFactory中建立了定轉(zhuǎn)速風電機組及轉(zhuǎn)子電阻可調(diào)風電機組的模型和靜
2、止同步補償器(STATCOM)控制模型,通過包含風電場的電力系統(tǒng)仿真驗證了STATCOM對基于定轉(zhuǎn)速風電機組和帶有可變轉(zhuǎn)子電阻控制的風電機組風電場暫態(tài)電壓穩(wěn)定性的貢獻。仿真結(jié)果表明,STATCOM能夠有效地幫助風電場在電網(wǎng)發(fā)生故障后恢復電壓,提高了風電場的故障穿越能力,確保風電機組連續(xù)運行及電網(wǎng)安全穩(wěn)定。關(guān)鍵詞:暫態(tài)電壓穩(wěn)定風電場靜止同步補償器風電機組中圖分類號:TM614TransientVoltageStabilityEnhancementofWindFarmUsingSTATCOMFanGaofengC
3、hiYongningZhaoHaixiangWangWeishengDaiHuizhu(ChinaElectricPowerResearchInstituteBeijing100085China)AbstractThepaperpresentsamethodtoenhancethetransientvoltagestabilityoffixedspeedwindturbineandvariablerotorresistancegeneratorbasedwindfarmusingstaticsynchrono
4、uscompensator(STATCOM).Thevoltagestabilitycharacteristicofinductiongeneratorisanalyzed.Theinductiongeneratorsabsorblotsofreactivepowerduringsystemfault,sothevoltagedecreases.TheSTATCOMcanprovidereactivepowersupportandavoidtrippingofthewindfarm.Theinductiong
5、eneratorbasedwindturbinemodels,variablerotorresistancecontrolmodelandSTATCOMmodelwereimplementedinthepowersystemsimulationprogramDIgSILENT/PowerFactory.Thecontributiontothetransientvoltagestabilitywasverifiedbypowersystemsimulationcontainingalargewindfarm.I
6、nthesimulationtwogeneratortypesareconsidered,oneiscagerotorinductiongeneratorandtheotheriswoundrotorinductiongeneratorwithvariablerotorresistance.Accordingtothesimulationresults,itcanbeconcludedthatSTATCOMprovidesreactivepowersupporttothevoltagerecoveryofge
7、nerators,thevoltagerestorerapidlyafterthefaultscleared,sothelowvoltageridethrough(LVRT)capabilityisimproved,ensuresthecontinuousoperationofwindturbinesandthesecurityandstabilityofthepowernetwork.Keywords:Transientvoltagestability,windfarm,STATCOM,windturbin
8、風電機組的效率,采用基于轉(zhuǎn)子電阻可調(diào)的繞線轉(zhuǎn)1引言子異步電機的風電機組。大規(guī)模風電場并網(wǎng)引起的定速風電機組技術(shù)成熟,運行可靠,性價比較暫態(tài)電壓穩(wěn)定性問題在風電接入對電力系統(tǒng)影響研高,仍然是多數(shù)風電場的主流機型,為了提高定速究中一直是個熱點問題,國內(nèi)外有大量文獻對風電[1-7]接入電網(wǎng)對電網(wǎng)電壓穩(wěn)定的影響進行過研究。研收稿日期2006-10-18改稿日期2007-03-27究表明異步電機在發(fā)出有功功率