控制与应用技术IEMCA电机与控制应用2023,50(8)单相级联H桥整流器电压平衡控制策略李延帅，徐传芳，张宁，宋阳阳（大连交通大学自动化与电气工程学院，辽宁大连摘要：以无工频变压器牵引传动系统前端的单相级联H桥整流器（CHBR）为研究对象，构建了其数学模型，在电压电流双闭环控制策略的基础上，引人无锁相环技术，改进瞬态电流控制策略。实现了系统发生扰动时，网侧电流对电压相位频率的快速精确追踪。进一步地，对传统附加平衡电压控制策略加以改进，增加模糊控制技术，解决了CHBR在非理想电网或负载大范围投切载时,存在的直流侧各级电容电压不平衡、压差大等问题。最后，利用MATLAB/Simulink进行仿真，对所提策略在CHBR运行时的快速响应和抗干扰能力进行了验证。关键词：单相级联H桥整流器；双闭环；无锁相环瞬态电流控制；电容电压平衡策略中图分类号：TM461文章编号：1673-6540(2023)08-0032-06doi:10.12177/emca.2023.095VoltageBalanceControlStrategyofSingle-PhaseCascadeH-bridgeRectifier(SchoolofAutomationandElectricalEngineering,DalianJiaotongUniversity,Dalian116000,China)Abstract:Asingle-phasecascadedH-bridgerectifier(CHBR)inthefrontendofthetractiondrivesystemofatransformerwithoutpowerfrequencyisstudied,anditsmathematicalmodelisconstructed.Onthebasisofthevoltageandcurrentdoubleclosed-loopcontrolstrategy,thenonphase-lockedlooptechnologyisintroducedtoimprovethetransientcurrentcontrolstrategy.Thegrid-sidecurrentcanquicklyandaccuratelytrackthevoltagephasefrequencywhenthesystemisdisturbed.Furthermore,thetraditionaladditionalbalancedvoltagecontrolstrategyhasbeenimproved,andthefuzzycontroltechnologyisaddedtosolvetheproblemsofunbalancedvoltageandlargevoltagedifferencebetweenalllevelsofcapacitorsontheDCsideofCHBRwhenitisnotidealpowergridorloadisswitchedoverawiderange.Finally,MATLAB/Simulinkisusedforsimulationtoverifythefastresponseandanti-interferenceabilityoftheproposedstrategyduringCHBRoperation.Keywords:single-phasecascadeH-bridgerectifier;doubleclosed-loop;transientcurrentcontrolwithoutphase-lockedloop;capacitorvoltagebalancingstrategy0引言车载变压器能将接触网电压降低到适合车载电力电子设备的水平，并保证对车载设备的电绝缘，是交...
