三相电流型PWM整流器及其控制策略研究

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1、江苏大学硕士学位论文三相电流型PWM整流器及其控制策略研究姓名：丁艳华申请学位级别：硕士专业：电力电子与电力传动指导教师：郑宏20100612江苏大学硕士学位论文ABSTRACTConveNertechnologyhasbeenusedinindustrialproductionfield，moreandmoreindustriesadoptrectifiertechnologytobetheimportantprocessofproductionastheabviousdevelopmentpowerelectronicstechnology．Atpresent，mosti

2、nverterequipmentshaverectifierlink．Therectifieriscomposedofpowerelectronicdevices．Therehasbeengreatimprovementofrectifiertechnologyformpreviousuncontrolleddiedoderectifiersourcetothecontrolledones，butitstillexistsharmonicpollution．Therefore，thispapermakethePWMcurrentsourcerectifiersuchasits

3、mathmodelandcontrolstrategybetheresearchcontenttosearchforbetterresultofcontrolling．Thecurrentsourcerectifierandthevoltagesourcerectifierhavesymmetryintopology,SOtheyhavedualityincontrolstrategy．Otherwise，thereisessentialdifferenceonPWMmethod．ThePWMmethodoftheformerCanbegotbytransferringthe

4、latter’S．Thecontrolofrectifier’Scurrentisthemostimportantandmostdifficultofresearch．Thispaperanalyzesthetwobasiccontrolmethodsofcurrentcontrolthatindirectcurrentcontrolanddirectcurrentcontr01．TheindirectcurrentcontrolissimpleandCanbecarriedouteasily,butithasbaddynamicstabilityandissensitive

5、aboutthechangeofload，SOitcannotbeusedinthefieldofhighrequirementoncontrolprecision．Thedirectcurrentcontroladoptsclosed-loopcurrentcontrol，SOithashiI曲precisionandstrongrobustness．Toenhancetheguideoftheoryresearchtopracticalapplication，thispaperstudiestherectifier’Scontrolunderunbalancedpower

6、gridandgetsthemethodofpowerregulationbycalculatingaboutthepowersystemelectromotiveforce．Furthermore，thecontrolmethodwhichisdifferentfrombalancestatecouldbegot．ThispaperdoessomesimulationsbyMatlab／Simulinksoftwarebasesonthroreticalanalysis，theresultsshowthatthecontrolstrategieshavegoodeffect

7、s．KeyWords：thecurrentrectifier,mathmodel，directcurrentcontrol，unbalancedpower鲥d学位论文版权使用授权书本学位论文作者完全了解学校有关保留、使用学位论文的规定，同意学校保留并向国家有关部门或机构送交论文的复印件和电子版，允许论文被查阅和借阅。本人授权江苏大学可以将本学位论文的全部内容或部分内容编入有关数据库进行检索，可以采用影印、缩印或扫描等复制手段保存和汇编本学位论文。保密口在年解密后适用本授权书。本学位论文属于不保密圈学位论