摘要
介绍了一种新型直驱交流励磁风力发电系统,在推导出新型直驱交流励磁发电机的数学模型基础上,提出一种基于矢量控制的空载并网控制策略。机侧变换器和网侧变换器是双PWM变换器,机侧变换器采用定子电压定向矢量控制,网侧变换器采用电网电压定向矢量控制,两者协调控制,实现直流母线电压稳定,有功功率和无功功率的解耦,功率因数可调。励磁变换器采用定子磁链定向的矢量控制,通过控制励磁电流来控制定子空载电压,保证机侧PWM整流器的可靠运行。在此基础上,对控制策略进行仿真分析。仿真结果表明,在风速大范围变化时,该新型系统有良好的动、静态性能,能够实现并网操作,验证了该控制策略的可行性和有效性。
A novel direct-drive AC excited wind power generation system is introduced.Based on the mathematical model of new direct-drive AC excited generator,a no-load grid-connected control strategy based on vector control is proposed.The generator-side converter and grid-side converter are double PWM converters,the generator-side converter uses stator voltage oriented vector control,the grid-side converter uses grid voltage oriented vector control,they are coordinated control to realize the DC bus voltage stability,active power and reactive power decoupling,adjustable power factor.The excitation converter uses stator flux oriented vector control to control the no-load voltage of the stator by controlling the excitation current to ensure the reliable operation of the generator-side PWM rectifier.On this basis,the control strategy is simulated and analyzed by using simulation software.The simulation results show that the new system has good dynamic and static performance and can realize grid-connected operation when the wind speed changes in a large range.The feasibility and effectiveness of the control strategy are verified.
作者
康尔良
黄善武
苏显贺
KANG Er-liang;HUANG Shan-wu;SU Xian-he(School of Electric and Engineering, Harbin University of Science and Technology, Harbin 150080,China)
出处
《哈尔滨理工大学学报》
CAS
北大核心
2020年第2期105-110,共6页
Journal of Harbin University of Science and Technology
基金
黑龙江省科技攻关资助项目(GC04A517)。
关键词
新型风力发电系统
直驱交流励磁
空载并网
PWM变换器
矢量控制
new type wind power generation system
direct-drive AC excitation
no-load grid-connected
PWM converter
vector control
