MATLAB风电并网逆变器控制系统仿真+SVPWM算法

摘要：风力发电在能源问题越来越严重的时候越来越凸显其优势，而直驱式风力发电以其发展成熟，发电系统成本低成为研究的热点。本文通过对MATLAB软件中simulink仿真系统建立模型，对直驱式风电并网逆变器控制系统进行了一定的研究。主要应用空间电压矢量(SVPWM)算法建立控制电路，以及坐标变换对电网的解耦控制，搭建了整个仿真系统，该方法根据α-β复平面空间中的状态开关矢量，直接合成参考电压空间矢量，进行相关矢量作用时间的求取。计算量适中，实时性好，逆变器输出电流谐波小，容易实现解耦控制等优点。同时给出了相关的数学推导来证实相关原理和算法理论。之后对整个系统进行仿真实验，结果表明，采用该系统进行并网逆变控制，逆变器对母线电压利用率高，系统简单，有功无功解耦控制良好。5024
关键词：直驱式风电，空间电压矢量，并网逆变器，MATLAB仿真, 毕业论文
The simulation of grid inverter control system
Abstract: wind power generation in the energy problem is more and more serious, increasingly highlights its advantage of the direct drive wind power to the development of mature, low cost power generation system is becoming a hot spot of research. Based on simulink in MATLAB software simulation system model, the direct drive wind power grid inverter control system was studied. Main application space voltage vector (SVPWM) algorithm based control circuit, and the decoupling control of power grid, coordinate transformation is to build the whole simulation system, the method based on alpha beta status switch vector in complex plane space, direct synthesis of the reference voltage space vector, vector effect time to calculate. A moderate amount of calculation and good real-time performance, the inverter output current harmonic is small, easy to realize decoupling control, etc. And related mathematical derivation is given to confirm the theory principle and algorithm. After the simulation experiment of the whole system, results show that using this system to carry on the grid inverter control, inverter of busbar voltage utilization rate is high, the system is simple, active reactive power decoupling control is good.
Keywords: direct drive wind power generation，SVPWM，vector grid inverter，MATLAB simulation
目录
1 绪论   1
1.1 风力发电的现状   1
1.1.1 世界风力发电的发展   1
1.1.2 中国风力发电的现状   2
1.2 风力发电机类型简述   4
1.3 直驱型风力发电机和双馈型风力发电机的特性比较   5
1.4 电力电子器件的发展   5
1.5 本论文所要完成的工作   6
2 风电并网逆变控制系统数学模型分析   7
2.1 网侧变换器的矢量控制的数学模型   7
2.2 控制系统仿真框图   11
3 风电并网逆变器控制系统的仿真模型搭建   12
3.1 MATLAB简介   12
3.2 并网逆变器控制系统的整体模型   12
3.3 并网逆变器控制系统仿真模块   13
3.3.1 3s/2s变换模块的搭建   13
3.3.2 电网电压取角   14
3.3.3 2s/2r变换模块   14
3.4 SVPWM原理及其模块的搭建   15
3.4.1 SVPWM原理简介   15
3.4.2 扇区选择模块   20
3.4.3 开关矢量时间的确定   21
3.4.4 生成SVPWM开关信号   25
3.4.5 搭建成整体的SVPWM波生成模块   26 MATLAB风电并网逆变器控制系统仿真+SVPWM算法:http://www.751com.cn/zidonghua/lunwen_1881.html