摘要
讨论了一种主电路采用两桥臂三电平电容箝位的并联型有源电力滤波器的拓扑结构,并介绍了其工作原理及控制策略。通过滞环电流比较控制可以实现补偿电流追踪指令电流并且使中点电压平衡,同时利用逆变器的冗余状态来补偿箝位电容电压,实现电容电压的动态平衡。基于MATLAB对有源电力滤波器进行了系统的仿真建模研究。结果表明,所研究的有源电力滤波器可以有效地抑制非线性负载产生的谐波,具有良好的补偿效果。
A new topology of shunt active power filter （SAPF） with two-lag three-level clamped capacitor in the main circuit is presented, and the operation principle and control scheme were introduced. The hysteresis current comparison control scheme is used to track the line current command and to balance the neutral-point voltage. Meanwhile the redundant operating states in the adopted inverter can be selected to compensate the clamped capaci- tor voltage to achieve the dynamic balance of the capacity voltage. The active power filter system is simulated by MATLAB. Simulation results show that the SAPF can effectively eliminate harmonics of the nonlinear loads and prove that it can compensate effectively.
出处
《电力科学与工程》
2011年第6期22-27,共6页
Electric Power Science and Engineering
关键词
两桥臂
三电平
电容箝位
有源电力滤波器
仿真
two-leg
three-level
capacitor clamped
active power filter
simulation
