摘要
为了治理非线性负载产生的谐波问题,研究了一种简化型LC式混合有源电力滤波器,由三相二臂三电平逆变器串联LC无源滤波器之后并网。构建了简化型LC式混合滤波器的电压电流双环的控制框图。直流侧电压采用均压控制,实现了直流侧电压的平稳和均衡,维持逆变器的稳定、可靠运行;针对电流内环,在分析混合型滤波器结构和数学模型的基础上,推导了逆变器的无差拍控制公式,实现了逆变器输出电流的闭环控制,提高了逆变器的动态补偿性能。最后,仿真和实验结果验证了所提出结构和控制方法的正确性。
A simplified LC-hybrid active power filter （LC-HAPF） was researched to manage the harmonics generated by the nonlinear load, which consisted of three-phase two-leg inverter and LC passive power filter. For DC-link voltage-balance problem, a voltage-balance control was adopted to achieve the dynamic balance of DC-link voltage. Based on the analysis of switch model of LC-HAPF, the deadbeat control equations were derived for inverter which could realize a fast and indifference tracking of output current. Finally, the simulation and experimental results verify the proposed structure and the control method correctly.
出处
《电源技术》
CAS
CSCD
北大核心
2012年第9期1363-1367,共5页
Chinese Journal of Power Sources
基金
国家"十一五"科技支撑计划(2009BAG12A09)
关键词
三电平逆变器
三相二臂
谐波抑制
无差拍控制
电能质量
three-level converter
three-phase two-leg
harmonic suppression
deadbeat control
power quality
