风电系统的混合式液压机械无级变速技术  

Hybrid Hydro-mechanical Continuously Variable Transmission Technology for Wind Power System

作　　者：黄国勤[1] 罗莎祁 胡博 于今[1] HUANG Guoqin;LUO Shaqi;HU Bo;YU Jin(State Key Laboratory of Mechanical Transmission∥College of Mechanical Engineering,Chongqing University,Chongqing 400044,China)

机构地区：[1]重庆大学机械传动国家重点实验室//机械工程学院,重庆400044

出　　处：《华南理工大学学报（自然科学版）》2019年第1期95-102,共8页Journal of South China University of Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(51709023;51375507)~~

摘　　要：针对风力发电中变速恒频难的问题,提出一种基于混合式液压机械复合无级变速器(HMCVT)的系统设计方案,通过功率分流的方式将液压的高功率密度、无级变速的特点与机械的高效率特性结合并互补.首先以变速输入、恒速输出为前提,理论分析了液压机械变速器式风力发电系统的调速特性和效率特性;然后,结合实际工况,利用Matlab/Simulink软件对该系统进行数学建模和动态仿真分析,通过模糊PID控制器实现了对输出转速的快速精确控制;最后,利用搭建的变速器综合测试平台对样机的调速特性进行了测试.研究结果表明:液压机械复合变速器用于风力发电系统,能在额定切入、切出风速范围内很好的解决变速恒频问题,且动态性能良好,效率较高,稳定在87%左右.A wind power generation system design based on power-split type Hydro-mechanical continuously variable transmission(HMCVT)was proposed,aiming at the problem of variable speed constant frequency(VSCF)in wind power generation system.The system combines high-power density and stepless speed regulation in hydraulic circuit and high efficiency in mechanical circuit by means of power-split.Firstly,the static speed regulation and efficiency characteristics were analyzed theoretically on the premise of variable speed input and constant speed output.Secondly,modeling,dynamic simulation and analysis were carried out for the HMCVT wind power system by Matlab/Simulink,combining with the practical working conditions.Additionally,the controller based on fuzzy PID was established,which enabled it to control the output speed rapidly and accurately.Finally,the speed regulation characteristics of the transmission prototype was investigated on the comprehensive test platform.The simulation and experimental results show that the HMCVT technology provides a solution to VSCF problem for wind power generation system between the wind speed range of cut-in and cut-out.Moreover,it has swift dynamic property with the efficiency around 87%.

关 键 词：风力发电 变速恒频 液压机械无级变速器 功率分流 

分 类 号：TM619[电气工程—电力系统及自动化] TH39[机械工程—机械制造及自动化]