摘要
根据变速风力发电原理,结合矩阵式变换器和直接转矩控制的优点,建立了基于矩阵式变换器的双馈异步发电机直接转矩控制系统。为实现矩阵式变换器输入侧功率因数为1,并使输入电流和输出电压呈现正弦波,以电磁转矩、转子磁链、矩阵式变换器输入侧电压和电流相位角的正弦值的平均值为控制量,得到矩阵式变换器的开关选择表和直接转矩控制算法。仿真结果表明,系统具有良好的调速性能,在高低速情况下都能跟随风速变化,迅速调节双馈异步发电机转速;转子磁链观测准确,能够跟随给定值;系统方案正确有效,具有较强的鲁棒性。
According to variable-speed wind generation theory, a direct torque control （DTC） system of doubly-fed induction generator （DFIG） was established based on matrix converter by combining the advantages of matrix converters with the advantages of DTC schemes. In order to achieve unity input power factor and sinusoidal input current and output voltage of matrix converter, parameters such as torque, rotor flux ,and the sine of the displacement angle between the input current vector and the voltage vector were chosen as variables, and the switching table of matrix converters and DTC schemes was finally gained. Some numerical simulations were carried out in MATLAB environment. Results show that this system has a good speed adjustable performance, can adjust the speed of the DFIG quickly as the wind speed changes. The rotor flux observer value can accurately track the reference value. The correctness and effectiveness of the proposed method are validated.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2009年第11期2820-2825,共6页
High Voltage Engineering
基金
国家自然科学基金(60534040)
广东省教育厅专项重点实验室(IDSYS200701)
国家高技术研究发展计划(863计划)(2007AA05Z244)
广东省自然科学基金博士启动项目(6300295)~~
关键词
变速恒频
风力发电
矩阵式变换器
直接转矩控制
双馈异步发电机
转速控制
转子磁链矢量
variable-speed constant frequency
wind energy conversion system
matrix converter
direct torque control
doubly-fed induction generator
speed control
rotor flux vector
