摘要
直驱永磁风力发电系统中,永磁发电机的输出电压的幅值和频率随风速的波动而变化,不可直接并网。其实现并网最简单的办法是加入直流环节。因PWM整流技术具有输入电流正弦、功率因数可控、能量双向流动、直流母线电压可控制和抗负载扰动能力强等优点而获得广泛的重视。因此PWM整流是实现并网积极而有效的方法。
The electric power from the permanent magnet generators direct driven by wind turbine can not be utilized by connecting the generator to the grid directly since the voltage and the frequency of the generator will change when the wind speed changes. The simple way to realize connecting grid is to join a DC link. PWM rectification is paid widely attention because the advantage of sinusoidal input current, power factor controlled, bi-direction flow of energy, DC bus voltage control and anti-disturbance capacity load. Therefore, PWM rectifier is a positive and effective way on connecting grid.
出处
《电气传动》
北大核心
2009年第6期26-28,50,共4页
Electric Drive
基金
国家十一五863研究项目(754202004)
关键词
风力发电
并网
PWM整流
电流正弦
能量双向流动
wind power generation
connecting grid PWM rectifier
current sine
bi-direction energy flow
