基于权系数法的功率和载荷协同控制策略  

Power and Load Cooperative Control Strategy Based on Weight Coefficient Method

作　　者：张良 何山[1,2] ZHANG Liang;HE Shan(College of Electrical Engineering,Xinjiang University,Urumqi 830047,China;Engineering Research Center of Ministry of Education for Renewable Energy Generation and Grid-connection Control,Urumqi 830047,China)

机构地区：[1]新疆大学电气工程学院,乌鲁木齐830047 [2]可再生能源发电与并网控制教育部工程研究中心,乌鲁木齐830047

出　　处：《科学技术与工程》2023年第27期11655-11663,共9页Science Technology and Engineering

基　　金：新疆维吾尔自治区高校科研计划(XJEDU2021I010);新疆维吾尔自治区重点研发项目(2022B01003-3);新疆维吾尔自治区重点实验室开放课题(2022D04029);新疆大学课程思政标杆课项目(XJU2022BGK27)。

摘　　要：针对大型风机在高风速区由风剪切效应引起的输出功率波动和叶轮不平衡载荷,从功率和载荷两个维度出发,以美国国家可再生能源实验室(National Renewable Energy Laboratory,NREL)公司的5 MW陆基风机为对象,提出一种基于权系数法的功率和载荷双目标协同的独立变桨控制策略。首先,以遗传算法优化的比例、积分和微分(proportional integral derivative,PID)作为主控制器,通过风轮转速反馈得到统一变桨距角;其次,根据方位角反馈得到各桨叶的动态权系数,以此调整各桨叶的桨距角;最后,将叶根挥舞力矩反馈给模糊PID控制器得到载荷影响下的桨距角微调量,并对桨距角进行修正。通过FAST和MATLAB/Simulink平台联合仿真,将所提控制策略与统一变桨距控制和独立变桨PI控制对比分析。结果表明,所提控制策略能有效地将输出功率稳定在额定功率附近,并且对于降低风轮不平衡载荷具有显著效果。Aiming at the output power fluctuation and unbalanced impeller load caused by wind shear effect in the high wind speed region of large wind turbines,an independent pitch control strategy based on the power and load dual-objective synergy of power and load based on the weight coefficient method was proposed for NREL's 5 MW land-based wind turbine from both power and load dimensions.First,the PID(proportional integral derivative)optimized by genetic algorithm was used as the main controller to get the uniform variable pitch angle through the wind turbine speed feedback.Then,the dynamic weight coefficient of each blade was obtained according to the azimuth angle feedback to adjust the pitch angle of each blade.Finally,the blade root waving moment was fed to the fuzzy PID controller to get the pitch angle fine-tuning under the influence of load,and the pitch angle was corrected.The proposed control strategy was compared and analyzed with the unified pitch control and independent pitch PI control through the joint simulation of FAST and MATLAB/Simulink platforms.The results show that the proposed control strategy can effectively stabilize the output power near the rated power and has a significant effect on reducing the unbalanced load of the wind turbine.

关 键 词：独立变桨 遗传算法 模糊PID 权系数法 协同控制 

分 类 号：TK89[动力工程及工程热物理—流体机械及工程]