第51卷第2期电力系统保护与控制Vol.51No.22023年1月16日PowerSystemProtectionandControlJan.16,2023DOI:10.19783/j.cnki.pspc.220406含双馈风电电力系统的采样负荷频率控制李谟发1,2，张志文1，练红海2，胡斯佳1(1.湖南大学电气与信息工程学院，湖南长沙410082；2.湖南电气职业技术学院风能工程学院，湖南湘潭411101)摘要：针对含新能源的多区域电力系统频率稳定问题，提出一种考虑控制信号更新周期变化的采样负荷频率控制(loadfrequencycontrol,LFC)方案。首先，在充分考虑系统采样特性的基础上，建立新型电力系统采样LFC模型，并将模型转化为一个采样数据网络控制系统。然后，利用整个采样区间+1[,)kktt信息，构建一个新的双边闭环型Lyapunov泛函。结合所提出的泛函与自由矩阵不等式，导出系统的低保守性稳定准则。基于这个准则，提出确保系统镇定的采样控制器设计方法。最后，通过实例仿真验证了所提方法的有效性与优越性。关键词：双馈风力发电；负荷频率控制；采样周期；Lyapunov泛函；控制器设计Samplingloadfrequencycontrolofpowersystemswithdoubly-fedwindpowerLIMofa1,2,ZHANGZhiwen1,LIANHonghai2,HUSijia1(1.SchoolofElectricandInformationEngineering,HunanUniversity,Changsha410082,China;2.SchoolofWindEnergyEngineering,HunanElectricalCollegeofTechnology,Xiangtan411101,China)Abstract:Toaddresstheproblemoffrequencystabilityofamulti-regionpowersystemwithnewenergy,asamplingloadfrequencycontrolschemeconsideringthechangesofthecontrolsignalupdateperiodisproposed.First,anewpowersystemsamplingLFCmodelisconstructedconsideringthesamplingcharacteristicsofthesystem.Themodelistransformedintoasamplingdatanetworkcontrolsystem.Then,byemployinginformationofthewholesamplinginterval+1[,)kktt,anewtwo-sideloopLyapunovfunctionisestablished.CombiningtheproposedLyapunovfunctionandafree-matrix-basedinequality,alessconservativestabilitycriterionisderivedforthesystem.Usingthiscriterion,adesignalgorithmforthedesiredsamplingcontrollerisproposedtoensuresystemstabilization.Finally,thevalidityandsuperiorityoftheproposedmethodareverifiedbysimulation.ThisworkissupportedbytheNationalNaturalScienceFoundationofChina(No.52061130217).Keywords:doubly-fedwindpower;loadfrequency...
