新型混合有源滤波器建模及其特性研究

Study of Modeling and Characterlstlc of New Type Hybrid Active Power Filter

为提高有源滤波器的滤波性能,减少日趋严重的谐波问题,提出了一种新的滤波系统结构。该文详细分析了工作原理,用数学建模的方法,建立了该滤波系统的控制模型方程,分析了在基于负载谐波电流控制逆变器输出电压的控制策略下,负载谐波电流的波动、电源谐波电压的波动、电网阻抗的波动、电网频率的波动对滤波系统控制性能的影响,接着分析了采用PWM控制下逆变器输出到电网过程中谐波电流相位的变化。研究表明该混合有源滤波器具有较大容量的无功补偿能力和较小的逆变器容量.试验和仿真结果证明该混合有源滤波器的正确性和可行性,对滤波器的设计和使用具有重要的理论指导意义和实用价值。

In order to enhance the filter＇s performance of the hybrid active power filter,and to reduce serious harmonics problem day by day,a new type hybrid active power filter is proposed. This paper analyzed principle and estabished control model equation of the filter system by mathematical modeling,based on the control strategy of load harmonic current controllihng inverter output voltage,the impacts of system parameter changes on the control characteristics of APFSIC,such as changes of load harmonic current, busbar harmonic voltage, system impedance and system frequency are analyzed, And then analyzed the harmonic current phase＇s change from the inversion to process of the power grid under the control of PWM. This hybrid active filter has larger reactive power compensation and smaller inversion, experiment and simulation results have proved the effectiveness of the proposed topology,it provides important practical and theoretical value to the design and the use of active power filter.