利用STATCOM解決電網(wǎng)電壓恢復問題.pdf

1、華北電力大學碩士學位論文摘要本文針對沙特阿拉伯西部電網(wǎng)存在的電壓恢復問題展開研究，闡述了沙特西部電網(wǎng)的概況及其特殊性，即夏季負荷高峰期空調(diào)比重高達80%以上。指出了引起電壓恢復問題的根源是故障后大量空調(diào)的堵轉(zhuǎn)現(xiàn)象分析了空調(diào)電機引起電壓恢復問題的機理提出了能夠適用于PSsE暫態(tài)仿真的空調(diào)動態(tài)模型分析了電動機不同參數(shù)對電壓恢復的不同影響，為模型參數(shù)確定提供了依據(jù)為了解決沙特西部電網(wǎng)電壓恢復的問題，在DSP一380變電站加裝容量為500Mva

2、r的無功補償裝置STATCOM。仿真算例表明引入STATCOM是抑制故障后大量空調(diào)堵轉(zhuǎn)引起的電壓恢復問題的有效方法，采用所提出的控制策略，電壓在15內(nèi)即可完全恢復。本文也通過仿真算例驗證了STATCOM相比于SVC的優(yōu)越性。關(guān)鍵詞:電壓恢復，負荷建模，空調(diào)負荷，STATCOM，電機堵轉(zhuǎn)ABSTRACTThisdissertationstudiesthePhenomenonofdelayedvoltagereeoveryinPowersy

3、stemofSaudiElectricityComPanyWesternRegion(SEC一WR).TheloadeomPositiondatashowthattheProPtionofair一eonditioner(AC)15methan80%，whenloadsreaehthelargestlevelinsummerinSEC一WR.TheProblemofvoltagereeoveryinSEC一WR15resultingfro

4、mmotorstallingoflargeACloadsafterfaults.AfteranalyzingthereasonofwhyACmotorseouldleadtodelayedvoltagereeoveryorvoltageeollaPse.TheauthorPutfwardsthedynamieACmodelwhieheouldbeusedfortransientsimulationinPSSE.Theinflueneeo

5、fdifferentmotorParameterstovoltagereeovery15studied，andbasedonthesetheParameterofACmodeleouldbedetermined.AStatieSynehronousComPensat(51…Al，COM)systemwhoseeapaeity1550OMvar15introdueedatDSP一380，SimulationshowsthatemPloyi

6、ngSTATCOM15aneffeetivesolutiontoPreventdelayedvoltagereeoveryduetostallingoflargeACmotorduringandaftersystemfaults，andfullvoltagereeoverywithin15eanbeachievedft沖iealshorteireuitfault.ThesuPeriorityofSTATCOMtoSVC15alsoPro

7、vedthroughSimulation.MingmingDu(PowerSystemanditsAutomation)DireetedbyProf.MinxiaoHanKEYWORDS:voltagereeovery，loadmodeling，ACload，STATCOM，motorstallingI華北電力大學碩士學位論文4.3常見的多臺電動機綜合等值方法.......................................

8、........................……，…，……，二，.……274.3.1方法一:取滑差極端值，輸入阻抗相等.............................................................……284.3.2方法二:轉(zhuǎn)子端口并聯(lián)，電氣參數(shù)加權(quán).........................……，...……，...................……314.3.3方法三:電氣參數(shù)加權(quán)

9、，有功功率求和.............................................................……314.4多臺空調(diào)電動機的綜合等值...........................……，..........……，...............……324.5多個靜負荷的綜合等值..........................................................

10、......……324.6對空調(diào)模型及參數(shù)的驗證.......................................................……334.6.1Dsp故障(2。。0.8.22)...........................................................……344.6.2Dsp故障(2003.8.巧).............……，.................

11、...........................……354.7本章小結(jié)...............................................................................................................................……36第五章STATCOM對沙特西部電網(wǎng)電壓恢復的影響...........................

12、............................................……375.1引言............................................................................……，.....................................................……375.2解決電壓恢復問題的方法.................

13、..............……375.2.1不同比例的空調(diào)組成..........................................................……375.2.2同步發(fā)電機和同步調(diào)相機......................................................................................……395.2.3并聯(lián)電容器..........

14、...................................................................................................……395.2.4靜止無功補償器(SVc).........……，............................................................................……405.2.5靜止同

15、步補償器(sTA丁COM)....................................................................................……435.3STA下COM的模型、參數(shù)和控制策略.........……，…，..............................................................……465.4仿真驗證...........

16、..……，....................................……，................................................................……475.4.1Dsp故障(2003.8.15).......................................……475.4.2DsP故障(2。。0.8.22).........……，..……，......

17、.......................，，……495.5本章小結(jié)...........................................................................................................................……，..…50第六章結(jié)論與展望.............................................

18、.....................................................................……51致謝.................................................................................................................................................