利用STATCOM解決電網電壓恢復問題.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存在的電壓恢復問題展開研究，闡述了沙特西部電網的概況及其特殊性，即夏季負荷高峰期空調比重高達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的堵轉現象分析了空調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)仿真的空調動態(tài)模型分析了電動機不同參數對電壓恢復的不同影響，為模型參數確定提供了依據為了解決沙特西部電網電壓恢復的問題，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堵轉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。關鍵詞:電壓恢復，負荷建模，空調負荷，STATCOM，電機堵轉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:轉子端口并聯，電氣參數加權.........................……，...……，...................……314.3.3方法三:電氣參數加權

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

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

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

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

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

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...........................................................................................................................……，..…50第六章結論與展望.............................................

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