并联有源电力滤波器三角载波与滞环比较控制策略比较与仿真

Comparison and simulation of the methods with triangle-wave and hysteresis comparison in current control of shunt active power filter

随着大量非线性设备投入电力系统,其引起的谐波问题倍受关注,而有源电力滤波器被认为是抑制谐波污染的最有效设备之一,其性能很大程度上取决于电流控制部分,阐述了有源电力滤波器的工作原理,并针对并联有源电力滤波器的特点,着重分析了单相有源电力滤波器的工作过程,利用PSIM软件作为仿真平台,搭建了有源电力滤波器主电路及电流控制电路,电流控制部分采用三角载波与滞环比较2种控制策略,在基于瞬时无功理论谐波电流检测的基础上,采用2种控制方式分析了有源电力滤波器的性能,并比较了三角载波与滞环比较控制策略的工作原理及优缺点,仿真过程与结果有效地为电流控制提供参考和依据。

Harmonic problem is more concerned along with lots of nonlinear equipments into the power system, and active power filter should always be deemed to the most effective fixture, the performance of which is quite concerned with the part of current control. The working principle of active power filter was described, and the working process of single-phase active power filter was analyzed, according to characteristic of shunt active power filter. The main circuit and control part of active power filter was established with triangle-wave PWM and current hysteresis comparison control using PSIM software as the platform of simulation. Based on the instantaneous reactive power theory for current detection, the performance of active power fiber adopting two control modes was analyzed, and the working principle and advantages of control methods with triangle-wave PWM and current hysteresis comparison were compared, and the simulation process and results provided the references and basis for current control.