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.220534风电调频补偿水锤效应的频率特性分析朱博1,束洪春1,吴水军2,黄柯昊1,孙士云1,邓涵1(1.昆明理工大学,云南昆明650051;2.云南电力试验研究院(集团)有限公司,云南昆明650217)摘要:水轮机在云南电网中占比很大,为了解决水轮机的水锤效应带来的功率反调现象,提出了一种考虑风电调频特性补偿水锤效应的分析方法。首先,建立了含风、水、网、荷的简单系统数学模型。其次,使用直流潮流法得到水轮机及其调频策略、风机及其调频策略所对应的代数微分方程和系统网络方程。并在此基础上进行线性化处理,推导出负荷扰动时水轮机和风机并网节点频率响应的频域解析式。根据解析式分析调频控制参数等对系统频率的影响。最后,通过以双机系统及实际电网的仿真分析对风机补偿水轮机水锤效应的有效性和可行性进行了验证。关键词:异步联网;风电调频;水锤效应;调频指标AnalysisoffrequencycharacteristicsofwaterhammereffectcompensatedbywindpowerfrequencymodulationZHUBo1,SHUHongchun1,WUShuijun2,HUANGKehao1,SUNShiyun1,DENGHan1(1.KunmingUniversityofScienceandTechnology,Kunming650051,China;2.YunnanElectricPowerTest&ResearchInstitute(Group)Co.,Ltd.,Kunming650217,China)Abstract:WaterturbinesaccountforalargeproportionofenergyintheYunnanpowergrid.Tosolvetheproblemofpowerinversioncausedbythewaterhammereffectoftheturbine,thispaperpresentsananalysismethodofcompensatingtheeffectbyconsideringthefrequencymodulationcharacteristicsofwindpower.First,asimplesystematicmathematicalmodelincludingwind,water,networkandloadisestablished.Thenthealgebraicdifferentialandsystematicnetworkequationscorrespondingtothehydraulicturbineanditsfrequencymodulationstrategy,thewindturbineanditsfrequencymodulationstrategyareobtainedbythedirectcurrentpowerflowmethod.Thenlinearizationiscarriedout.Thefrequencydomainanalyticalexpressionofthefrequencyresponseoftheturbineandwindturbinegridconnectednodesunderloaddisturbanceisderived.Theinfluenceoffrequencymodulationcontrolparametersonthesystemfrequencyisanalyzedaccordingtoananalyticalformula.Finally,thevalidi...