论文部分内容阅读
以谐波治理为研究目的,针对有源滤波器模型是存在强耦合、非线性、结构复杂的系统的问题,提出一种利用微分几何方法建立了三相并联型有源电力滤波器的仿射非线性模型,使谐波电流与直流侧电压实现解耦,且可以独立地对其分别控制。同时提出了当负载发生变化存在迟滞的动态补偿方法,该方法可以很好地补偿谐波,改善功率因数,提高电网的利用率。在控制方法上利用仿射模型线性化后控制主电路,与常见控制算法对比,发现总谐波畸变率(THD)明显降低。最后,利用matlab2010b平台仿真证明了整体思路的正确性和有效性,为实现有源滤波器装置提供了可行性分析。
For the purpose of harmonic control, aiming at the problem that the active filter model is a system with strong coupling, nonlinear and complex structure, an affine model of three-phase shunt active power filter The nonlinear model decouples the harmonic currents from the DC link voltage and independently controls them. At the same time, a dynamic compensation method with hysteresis is proposed when the load changes. This method can well compensate the harmonics, improve the power factor and improve the utilization of the power grid. The main circuit is controlled by the affine model after the control method is linearized. Compared with the common control algorithm, the total harmonic distortion rate (THD) is obviously reduced. Finally, using matlab2010b platform simulation to prove the correctness and validity of the overall idea, to provide a feasibility analysis for the realization of active filter device.