一種電壓無功控制的二次函數(shù)模型與算法

1、湖南大學碩士學位論文一種電壓無功控制的二次函數(shù)模型與算法姓名：劉宏超申請學位級別：碩士專業(yè)：電力電子與電力傳動指導教師：彭建春20040220AbstractThevoltage／varcontrolofpowersystemcanefficientlyminimizetherealpowerlossesandimprovevoltageprofiles，SOthattheyearlyrunningchargewillbereduced

2、andthequalityofpowerenergycanbeincreasedAsaresult，itisingreatnecessityforUStostudytheschemeofvoltage／varcontr01ThestudyisveryimportantfortheeconomicoperationandthereliabilityofelectricpowersystemThispapersyntheticallyana

3、lyzesthestatusandtheproblemsexistinvoltage／varcontrolfieldThetraditionalmathematicalmodelandalgorithmarediscussedandtheircharactersareanalyzedThetraditionalvoltage／varcontrolmainlybringintoeffectbynineareadiagram，whichis

4、implementedbythereactiveequipmentofthetransformersubstationTheobjectivefunctionisthelocalvoltageoptimizationTheydon’tconsidertheinfluenceofthelocalreactivepowermodificationtothevoltageoftheothernodesintheelectricnetworkI

5、tdoesn’tmakefulluseoftheequipmenttoaccomplishthesyntheticaloptimizationcontr01Accordingtothecharacteristicsandproblemofvoltage／varcontrol，anewwideareavoltage／varcontrolalgorithmisproposedinthispaperThenewmethodbasedonthe

6、initialpowerflowoftheelectricnetworkTheinfluenceeachotherofthedifferentnodesduringthereactivepowermodificationareconsideredinthenewalgorithmBasedonthemathematicrelationshipofthenodalimpedancematrixandthenodalvoltage、noda

7、lcurrent，themathematicrelationshipbetweenthecontrolvariableandthestatusvariableispresentedAtthesametime，thequadraticfunctionExpressionformulaofthevoltagerestrictionispresentedAndthequadraticfunctionmathematicmodelisgiven

8、TheobjectivefunctionistheminimizationofthenetworklossinthewholeelectricnetworkAFleWcontrolschemeisproposedAndtheimplementflowofthealgorithmisintroducedindetailTheprocesstorealizethenewalgorithmwithMATLABispresentedindeta

9、ilAttheendofthisdissertation，theproposedmathematicalmodelandalgorithmareappliedtoa5bussystemandtheIEEE30一bussystemTheresultsaresatisfactoryComparedwithtraditionalvoltage／varcontrolalgorithm，thecorrectnessandefficiencyoft