28东北电力技术NOＲTHEASTELECTＲICPOWEＲTECHNOLOGY2023年第44卷第2期储能系统中三电平图腾柱AC－DC变换器的研究敬成1，王袁2，徐兵3(1.三峡大学电气与新能源学院，湖北宜昌443002;2.上海电力大学自动化工程学院，上海200090;3.辽宁东科电力有限公司，辽宁沈阳110179)摘要:储能系统中两电平变换器体积大，功率密度小;电压电流应力高，对器件耐压要求高，电路成本较高。针对上述问题，对2种T型三电平桥臂推衍，并结合图腾柱无桥电路，提出一族三电平图腾柱AC－DC变换器。该族变换器能应用于电动汽车充电系统、储能系统场景中，成本较低。对所提电路工作原理分析，并与现有几种电路对比，结果表明所提电路在器件数目、电压应力上更具优势。设计了适合三电平电路的控制及调制方案，通过分析后确定了其中1个电路的电流应力，为损耗理论分析奠定了基础。最后，仿真结果表明了所提电路的正确性。关键词:T型三电平;图腾柱;AC－DC变换器;电压应力;电流应力［中图分类号］TM46［文献标志码］A［文章编号］1004－7913(2023)02－0028－06ＲesearchonThree-LevelTotem-PoleAC-DCConverterinEnergyStorageSystemJINGCheng1，WANGYuan2，XUBing3(1.CollegeofElectricalEngineering＆NewEnergy，ChinaThreeGorgesUniversity，Yichang，Hubei443002，China;2.CollegeofAutomationEngineering，ShanghaiUniversityofElectricPower，Shanghai200090，China;3.LiaoingDongkeElectricPowerCo.Ltd.，Shenyang，Liaoning110179，China)Abstract:Two-levelconverterinenergystoragesystemhasthelargevolumeandthesmallpowerdensity.Thevoltageandcurrentstressarehigh，whichrequirethedevicetowithstandvoltageandthecircuitcostishigh.Accordingtotheaboveproblem，three-leveltotem-poleAC-DCconvertersisproposedbasedonthederivationoftwoT-typethree-levelbridgearms.Theproposedconverterscanap-plytoelectricvehiclechargingsystemsandenergystoragesystemswithlowcost.Theresultsoftheworkingprincipleanalysisandthecomparisonwiththeexistingcircuitsshowthattheproposedcircuithasadvantagesintermsofthenumberofdevicesandvoltagestress.Thecontrolandmodulationschemesuitableforthethree-levelcircuitisdesigned.Thecurrentstressofonecircuitisanalyzedindetailbasedontheanalysisofthemodulationstrategy，whichisthetheoreticalbasisforlossanalysis.Fi...
