直驱型风电并网系统建模及关键参数变化影响研究
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摘要
以直驱永磁同步风力发电机为研究对象,分别建立了风力机、永磁同步发电机、换流器等环节的数学模型,并采用加权等值的方法对多台直驱型风电机组进行了等值。在并网系统的控制方面,基于矢量控制方法设计并实现了风机系统背靠背换流环节以及基于电压源换流器的高压直流输电(Voltage source converter based HVDC,VSC-HVDC)并网环节的控制策略,并从理论上分析了受端换流器的直流电压控制参数及受端所联电网强度对系统动态特性的影响。最后,通过PSCAD/EMTDC电磁暂态仿真软件对直驱型风电并网系统的运行特性进行了仿真分析,重点研究了风电系统接入不同强度的受端电网及并网侧换流器关键控制参数的不同取值对直驱型风电并网系统动态特性的影响,仿真结果验证了理论分析结果的正确性和合理性。
Taken direct-driven permanent magnet synchronous wind power generator( PMSG) as the research subject,this paper establishes the mathematical models of wind turbine,permanent magnet synchronous generator and converters. According to the weighted equivalent method,the equivalent model of multi-PMSGs is also built. In the aspect of wind power integration system control strategy,this paper designs and realizes the control strategies of PMSG wind power system back-to-back converters and VSC-HVDC converters based on vector control scheme. Then the effects on the dynamic characteristics of the whole system are theoretically analyzed,which are caused by the key control parameters of the grid-side DC voltage controller and the strength of receiving-end ac system. Finally,based on the PSCAD / EMTDC simulation software,this paper analyzes the operational characteristics of PMSG integration system and dissects the impacts of receiving-end power grid's strength and grid-side control parameters on the dynamic characteristics of PMSG wind power integration system. The simulation results justify the validity and rationality of the theoretically analytical results.
Taken direct-driven permanent magnet synchronous wind power generator( PMSG) as the research subject,this paper establishes the mathematical models of wind turbine,permanent magnet synchronous generator and converters. According to the weighted equivalent method,the equivalent model of multi-PMSGs is also built. In the aspect of wind power integration system control strategy,this paper designs and realizes the control strategies of PMSG wind power system back-to-back converters and VSC-HVDC converters based on vector control scheme. Then the effects on the dynamic characteristics of the whole system are theoretically analyzed,which are caused by the key control parameters of the grid-side DC voltage controller and the strength of receiving-end ac system. Finally,based on the PSCAD / EMTDC simulation software,this paper analyzes the operational characteristics of PMSG integration system and dissects the impacts of receiving-end power grid's strength and grid-side control parameters on the dynamic characteristics of PMSG wind power integration system. The simulation results justify the validity and rationality of the theoretically analytical results.
引文
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[2]栗然,高起山,刘伟.直驱永磁同步风电机组的三相短路故障特性[J].电网技术,2011,35(10):153-158.
[3]Chinchilla M,Arnaltes S,Burgos J C.Control of permanent-magnet generators applied to variable-speed wind-energy systems connected to the grid[J].Energy Conversion,IEEE Transactions on,2006,21(1):130-135.
[4]胡书举,李建林,许洪华.直驱风电系统变流器建模和跌落特性仿真[J].高电压技术,2008,34(5):949-954.
[5]姚俊,廖勇,瞿兴鸿,等.直驱永磁同步风力发电机的最佳风能跟踪控制[J].电网技术,2008,32(10):11-15.
[6]肖园园,李欣然,张元胜,等.直驱永磁同步风力发电机的等效建模[J].电力系统及其自动化学报,2013,25(1):12-17.
[7]严干贵,魏治成,穆钢,等.直驱永磁同步风电机组的动态建模与运行控制[J].电力系统及其自动化学报,2009,21(6):34-39.
[8]齐尚敏,李凤婷,石岩,等.基于PSCAD的直驱式风电机组运行特性仿真[J].电机与控制应用,2013,40(4):12-16.
[9]龚陈雄,王剑,吴丹岳,等.永磁直驱型风电场的并网仿真研究[J].广东电力,2014,27(2):38-42.
[10]寇世璞,胡彦奎,胡彦文,等.直驱永磁同步风电机组在不同电网故障下的动态响应仿真分析[J].科学技术与工程,2014,(11):31-36.
[11]石磊,李晨晨,田炜,等.海上风电场柔性直流送电并网控制研究[J].华东电力,2014,41(4):674-679.
[12]尹明,李庚银,张建成,等.直驱式永磁同步风力发电机组建模及其控制策略[J].电网技术,2007,31(15):61-65.
[13]屠卿瑞,徐政,张静.基于PSCAD/EMTDC的直驱式风力发电接入系统建模与仿真[J].太阳能学报,2010,31(4):523-530.
[14]陈建伟,晁勤,蒋佳良,等.基于双PWM变换器的直驱永磁同步风力发电机组建模与仿真[J].可再生能源,2010,(5):23-26.
[15]郑荣美,朱凌.直驱风电系统低电压运行特性研究[J].华北电力大学学报,2012,39(4):20-23.
[16]熊凌飞,韩民晓,万磊.柔性直流输电的小信号稳定性研究及控制系统参数设计[J].华北电力大学学报,2015,42(3):8-14.
[17]邵瑶,汤涌,郭小江,等.多直流馈入华东受端电网暂态电压稳定性分析[J].电网技术,2011,35(12):50-55.