·网源协调技术·储能系统参与新型电力系统调频控制及容量平衡策略王振洋(东北电力大学,吉林吉林132012)摘要:针对风力发电并网导致系统频率安全问题频发,迫切需要新的调频措施,为保证电网运行经济性和安全性,须为风电场配置储能系统的状况,设计储能参与电力系统一次和二次调频的控制策略,并对目前储能电池的各个储能单元的电池荷电状态(stateofcharge,SOC)水平不相等问题,提出一种基于储能电池当前容量的可调容量比例均衡控制算法。根据储能电池单元不同的SOC和其运行状态(充放电)共同决定调频产生的功率偏差信号如何合理分配到每个储能电池单元,使储能电池既能支撑电网频率调节,又能改善自身SOC不平衡的问题。最后,基于EMTDC/PSCAD仿真模型,验证该方法的有效性。关键词:虚拟惯量控制;下垂控制;储能电池;等比例控制;荷电状态平衡中图分类号:TM912;TM761文献标志码:A文章编号:1009-5306(2023)01-0001-06EnergyStorageSystemParticipatesinFrequencyModulationControlandCapacityBalanceStrategyofNewPowerSystemWANGZhenyang(NortheastElectricPowerUniversity,Jilin132012,China)Abstract:Grid-connectedwindpowergenerationleadstofrequentfrequencysecurityproblemsinthesystem,andnewfrequencymodulationmeasuresareurgentlyneeded.Inordertoensuretheeconomyandsafetyofpowergridoperation,itisnecessarytoconfigureenergystoragesystemforwindfarm.Thecontrolstrategyusestheenergystoragesystemforprimaryandsecondaryfrequencymodulation.Atpresent,thestateofchargelevelofeachenergystorageunitoftheenergystoragebatteryisnotequal.Inordertoensuretheeconomyandsafety,itisnecessarytodesigntheenergymanagementstrategyoftheenergystorageunititself.AccordingtothedifferentSOCoftheenergystoragebatteryanditsrunningstate(chargeanddischarge),thepowerdeviationsignalgeneratedbyfrequencymodulationcanbereasonablydistributedtoeachenergystoragebattery,sothattheenergystoragebatterycannotonlysupportthegridfrequencyadjustment,butalsoimproveitsownstateofchargeimbalance.Atlast,basedonEMTDC/PSCADsimulationmodel,theeffectivenessofthismethodisverified.Keywords:virtualinertiacontrol;droopcontrol;energystoragebattery;equalproportion;stateofchargebalance基金项目:国家自然科学基金委员会-国家电网公司智能电...
