静电除尘器谐振软开关高频高压电源的设计与实现

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1、浙江大学电气工程学院硕士学位论文静电除尘器谐振软开关高频高压电源的设计与实现姓名：官威申请学位级别：硕士专业：电力电子与电力传动指导教师：何湘宁20080801浙江大学硕士学位论文ABSTRACTTheelectrostaticprecipitator(ESP)isaveryimportantequipmentinenvironmentprotection,anditiswidelyusedincollectingofindustrydust．Basedonapplications，ahighfrequency，higllpowerandhi曲vo

2、ltagepowersupplyfortheESPWasstudiedandthemainprocessofitsdevelopmentwaspresented．Inthefirstchapter,theworkingprinciplesoftheESPanditselectriccharacteristicsaredescribed．SeveralkindsofpowersuppliesforelectrostaticprecipitatorinconlmonuSeareintroduced，whilethehi曲frequencyconvert

3、erisconsideredasthestateofarts．Atlast，problemstobesolvedinthispaperareproposed．Inthesecondchapter,powerconversionmethodstobeappliedinthepowercircuitsaleanalyzedfirstly．ElectriccharacteristicsandcircuitconditionoftheESPpowersupplyusingthePWMhard-switchingmethodandtheresonantsof

4、t-switchingmethodarecompared．Analyses眦provedandswitchinglossesareestimatedbysimulations．Atlast,theLCCseries-parallelresonantsoftswitchingmethodisadoptedinthehighvoltageDCpowersupply．．ThetllirdchapterisaboutthedesignofpowerstageofthehighvoltageDCpowersupply．ThetopologyusedisThr

5、ee-PhaseBridgeSCRRectifier,Single—Phase-Full-BridgeIGBTInverter,Hi曲一FrequencyTransformerandHigll-VoltageDiodesFull—BridgeRectifier,incascaderespectively．Andthedesignsofeachstagearepresented．Thecontrolstrategyandprotectivecircuitarebrieflyintroducedinthefourthchapterandprincipl

6、esofthesecircuits锄℃described．Experimentalresultsoftheprototypealeshowninthefifthchaptertoconfirmthedesignforhighpower,highfrequencyandhighvoltagepowersupply．Keywords：ElectrostaticPrecipitator,HVDCpower,resonantconverter,soft—switching，paralleledIGBT,planarbusbarⅡ浙江大学硕士学位论文第一章绪

7、论1．1引言随着工业的发展，生产规模的日益扩大，环境污染如水污染、空气污染、废物污染、化学污染、噪音污染、热污染等有日趋严重之势。粉尘是造成空气污染的主要污染物之一。支撑我国工业基础的煤炭加工、采矿、电力、冶金、炼油、化工、造纸等工业都是粉尘的排放源。工业粉尘的大量排放，不仅会危及人体健康和自然环境，在某些情况下还会造成大量贵重材料的流失。在诸多除尘设备中，静电除尘器不仅具有除尘效率高，处理烟气量大，阻力损失小，能耗小及运行费用低等优点，还可以用来回收有用材料和能源。因此静电除尘器在工业应用上的研究得到了越来越多的重视。1．2静电除尘器的工作原理静

8、电除尘器是一种利用电场力使气溶胶粒子(包括粉尘、烟、飞灰和烟雾等)从气体中分离出来的除尘装置。由于静电除尘器中的电场力是由