第24卷第2期2023年2月电气技术ElectricalEngineeringVol.24No.2Feb.2023构网型储能变流器并网系统SISO环路增益建模与重塑控制郭小龙1杨桂兴1,2张彦军1周毅3(1.国网新疆电力有限公司,乌鲁木齐830063;2.新疆大学电气工程学院,乌鲁木齐830046;3.四川大学电气工程学院,成都610065)摘要储能变流器是连接储能介质与电网的核心装备,当变流器控制参数与电网阻抗不匹配时,易出现失稳现象。为了分析构网型(GFM)储能变流器的并网稳定性,本文提出一种功率同步环主导的单输入单输出(SISO)环路增益模型,结合频域控制理论中的幅值、相位裕度实现对GFM储能变流器并网系统小干扰稳定裕度的量化分析,结果表明GFM储能变流器在弱电网下具有良好的稳定性,但是在强电网下系统稳定裕度不足;因此,提出一种基于虚拟阻抗的GFM储能变流器并网系统环路增益重塑控制策略,并研究虚拟电阻、虚拟电感对系统抗噪声干扰、稳态运行点及稳定性的综合影响规律,给出参数的整定建议。最后,通过Matlab/Simulink仿真模型证明了理论分析的正确性和有效性。关键词:构网型变流器;储能;小扰动稳定性;虚拟阻抗Modelingandreshapingcontrolofsingleinputandsingleoutputloopgainofthegrid-formingenergystorageconvertergrid-connectedsystemGUOXiaolong1YANGGuixing1,2ZHANGYanjun1ZHOUYi3(1.StateGridXinjiangElectricPowerCo.,Ltd,Urumqi830063;2.SchoolofElectricalEngineering,XinjiangUniversity,Urumqi830046;3.CollegeofElectricalEngineering,SichuanUniversity,Chengdu610065)AbstractTheenergystorageconverteristhecoreequipmentinconnectingtheenergystoragesystemandthegrid.However,theinteractionbetweentheconvertercontrolloopsandthegridimpedanceeasilycausessmall-signalinstabilityofthesystem.Inordertoclarifytheinteractionstabilitybetweenthegrid-forming(GFM)energystorageconverterandgird,thispaperproposesapowersynchronizationloopdominatedsingleinputandsingleoutput(SISO)loopgainmodel.Basedonconceptsoftraditionalmagnitudeandphasemarginsinfrequency-domaincontroltheory,small-signalstabilitymarginsofGFMenergystorageconvertergrid-connectedsystemarequantitativelydepicted.TheresultsindicatethattheGFMenergystorageconverterhasenoughstabilitymarginundertheweakgrid,butithasinsufficientstabilitymarginunderthest...