面向风力发电的径向柱塞泵的建模与仿真
|
摘要
低速大功率径向柱塞泵是风电液压增速系统的核心部件之一,柱塞腔内的压力瞬变规律和柱塞泵出口流量脉动规律的分析是风电变速恒频控制的基础。泵工作过程中存在的机液耦合现象,使泵的压力和流量变化规律难以识别。针对泵工作过程中存在的机液耦合现象,对低速大功率径向柱塞泵的工作原理和结构形式进行研究。基于柱塞泵运动构件的力学分析和流体压缩特性,在MATLAB中建立柱塞泵的机液耦合仿真模型。通过模型的数值求解,得到柱塞腔内压力、泵进出口流量、泵主轴转矩脉动等因素的变化规律。该机液耦合仿真模型的数值结果,为液压式风力机的变速恒频控制提供参考。
Low-speed high-power radial piston pump is one of the key components of wind turbine with hydraulic transmission. The pressure variation in the piston chamber and the outlet flow pulsation of the piston pump are the basis of variable speed constant frequency control inhydraulicwindturbine. Themechanical-hydraulic coupling phenomenon existsinradial pistonpumpmakes it difficult to identify pressure andflowratevariation.Toanalyzethe coupling phenomenon,the working principle and structure of low-speed and high-power radial piston pump were studied. Then,based on the mechanics analysis of the moving part in pump and fluid compressibility,a mathematical model of radial piston pump was established in MATLAB. Through the numerical calculation of the model,the pressure variation inpistonchamber,inlet and outlet flowrate of pump,torque ripple of pump spindle and so on were obtained. The simulation resultofthismechanical-hydrauliccoupled model can provide reference for the control of the wind turbine with hydraulic transmission.
Low-speed high-power radial piston pump is one of the key components of wind turbine with hydraulic transmission. The pressure variation in the piston chamber and the outlet flow pulsation of the piston pump are the basis of variable speed constant frequency control inhydraulicwindturbine. Themechanical-hydraulic coupling phenomenon existsinradial pistonpumpmakes it difficult to identify pressure andflowratevariation.Toanalyzethe coupling phenomenon,the working principle and structure of low-speed and high-power radial piston pump were studied. Then,based on the mechanics analysis of the moving part in pump and fluid compressibility,a mathematical model of radial piston pump was established in MATLAB. Through the numerical calculation of the model,the pressure variation inpistonchamber,inlet and outlet flowrate of pump,torque ripple of pump spindle and so on were obtained. The simulation resultofthismechanical-hydrauliccoupled model can provide reference for the control of the wind turbine with hydraulic transmission.
引文
[1]Skaare B,Ho咬rnsten B,Nielsen F G.Modeling,simulation and control of a wind turbine with a hydraulic transmission system[J].Wind Energy,2013,16(8):1259-1276.
[2]Silva P,Giuffrida A,Fergnani N.Performance prediction of a multi-MWwind turbine adopting an advanced hydrostatic transmission[J].Energy,2014(64):450-461.
[3]朱成党,涂乐,林勇刚.风电机组的机械液压混合传动技术[J].浙江大学学报:工学版,2014,48(10):1767-1774.(Zhu Cheng-dang,Tu Le,Lin Yong-gang.Hydro-mechanical hybrid power transmission technology in wind turbines[J].Journal of Zhejiang University:Engineering Science,2014,48(10):1767-1774.)
[4]王存堂,朱宏,杨明泽.风电系统的液压增速传动及储能技术[J].流体传动与控制,2012(5):1-4.(Wang Cun-tang,Zhu Hong,Yang Ming-ze.Hydraulic speed increase transmission and energy storage technology in wind power generation system[J].Fluid Power Transmission and Control,2012(5):1-4.)
[5]Ehsan M,Rampen W,Salter S.Modeling of digital-displacement pump--motors and their application as hydraulic drives for non-uniform loads[J].Journal of Dynamic Systems,Measurement,and Control,2000(122):210-215.
[6]李飞龙,林勇刚,李伟.风能静液压传动控制技术[J].吉林大学学报:工学版,2014,44(6):1664-1668.(Li Fei-long,Lin Yong-gang,Li Wei.Energy hydraulic transmission system for wind turbine[J].Journal of Jilin University Engineering and Technology Edition,2014,44(6):1664-1668.)
[7]褚金,张舜德,王鹏.风力发电机组的动态特性研究[J].机械设计与制造,2010(11):92-94.(Chu Jin,Zhang Shun-de,Wang Peng.Research on wind turbines’dynamic characteristics[J].Machinery Design&Manufacture,2010(11):92-94.)
[8]马吉恩,徐兵,杨华勇.轴向柱塞泵流动特性理论建模与试验分析[J].农业机械学报,2010,41(1):188-194.(Ma Jien,Xu Bing,Yang Hua-yong.Modelling and experiment study on fluid character of axial piston pump[J].Transactions of the Chinese Society for Agricultural Machinery,2010,41(1):188-194.)
[9]闻邦椿.机械设计手册:单行本-液压传动与控制[M].北京:机械工业出版社,2015.(Yan Bang-chun.Machine Design Handbook:Single Book-Hydraulic Transmission and Control[M].Beijing:China Machine Press,2015.)
[10]Mortensen K A,Henriksen K H.Efficiency analysis of a radial piston pump applied in a 5MW wind turbine with hydraulic transmission[D].Denmark:Aalborg University,2011.
[2]Silva P,Giuffrida A,Fergnani N.Performance prediction of a multi-MWwind turbine adopting an advanced hydrostatic transmission[J].Energy,2014(64):450-461.
[3]朱成党,涂乐,林勇刚.风电机组的机械液压混合传动技术[J].浙江大学学报:工学版,2014,48(10):1767-1774.(Zhu Cheng-dang,Tu Le,Lin Yong-gang.Hydro-mechanical hybrid power transmission technology in wind turbines[J].Journal of Zhejiang University:Engineering Science,2014,48(10):1767-1774.)
[4]王存堂,朱宏,杨明泽.风电系统的液压增速传动及储能技术[J].流体传动与控制,2012(5):1-4.(Wang Cun-tang,Zhu Hong,Yang Ming-ze.Hydraulic speed increase transmission and energy storage technology in wind power generation system[J].Fluid Power Transmission and Control,2012(5):1-4.)
[5]Ehsan M,Rampen W,Salter S.Modeling of digital-displacement pump--motors and their application as hydraulic drives for non-uniform loads[J].Journal of Dynamic Systems,Measurement,and Control,2000(122):210-215.
[6]李飞龙,林勇刚,李伟.风能静液压传动控制技术[J].吉林大学学报:工学版,2014,44(6):1664-1668.(Li Fei-long,Lin Yong-gang,Li Wei.Energy hydraulic transmission system for wind turbine[J].Journal of Jilin University Engineering and Technology Edition,2014,44(6):1664-1668.)
[7]褚金,张舜德,王鹏.风力发电机组的动态特性研究[J].机械设计与制造,2010(11):92-94.(Chu Jin,Zhang Shun-de,Wang Peng.Research on wind turbines’dynamic characteristics[J].Machinery Design&Manufacture,2010(11):92-94.)
[8]马吉恩,徐兵,杨华勇.轴向柱塞泵流动特性理论建模与试验分析[J].农业机械学报,2010,41(1):188-194.(Ma Jien,Xu Bing,Yang Hua-yong.Modelling and experiment study on fluid character of axial piston pump[J].Transactions of the Chinese Society for Agricultural Machinery,2010,41(1):188-194.)
[9]闻邦椿.机械设计手册:单行本-液压传动与控制[M].北京:机械工业出版社,2015.(Yan Bang-chun.Machine Design Handbook:Single Book-Hydraulic Transmission and Control[M].Beijing:China Machine Press,2015.)
[10]Mortensen K A,Henriksen K H.Efficiency analysis of a radial piston pump applied in a 5MW wind turbine with hydraulic transmission[D].Denmark:Aalborg University,2011.