摘要
针对并网矩阵变换器PWM信号开关频率较低,输出电流中谐波含量较大的状况,在并网变换器中采用T型滤波器取代典型的电感滤波器以抑制谐波电流;然后对T型滤波器系统的稳定性进行了分析,提出采用电网电流和滤波电容电流双闭环控制策略来实现系统的稳定运行。最后通过仿真实验证明,采用该控制策略不仅能保证系统的稳定运行,而且还具有较好的正弦输出电流波形和较小的谐波含量。
Regarding the harmonies distortion in output current increasing due to lower PWM switching frequencies in the grid-connected matrix converter, the typical inductance filter was substituted by T-filter to restrain harmonics. The stability of converter system with T-filter was analyzed and a control strategy of dual-loop based on grid current and filter capacitance current was proposed. Finally it is verified through simulation that this strategy can guarantee stability of the system with fine sine output current wave and little harmonics.
出处
《太阳能学报》
EI
CAS
CSCD
北大核心
2007年第1期62-67,共6页
Acta Energiae Solaris Sinica
基金
国家自然科学基金(50575228)
关键词
谐波分析
稳定性
矩阵变换器
harmonic analysis
stability
matrix converter
