混合型并联有源滤波器的稳定性

基于混合型并联有源滤波器的拓扑结构，在采用检测电网谐波电流控制策略时，该文重点研究了系统延时、电网电感和无源滤波器参数对系统稳定性的影响。考虑到谐波治理效果，有源滤波器的放大倍数K应越大越好，但系统中的延时环节、电网电感参数和无源滤波器参数限制了 的范围，决定了有源滤波器实际投入的最大容量。在上述理论分析的基础上，该文提出了一种K值在线自调整技术，使得不论是在轻微畸变状况下还是在严重畸变状况下，都能实现良好的谐波抑制效果，电网谐波畸变程度被控制到很小。

Stability of Hybrid Shunt Active Power Filter

Based on the introduction of its topology and control strategy, the mathematical model of hybrid shunt active power filter is proposed, with which the relationships between system stability and delay time, inductance of power system, and parameters of passive filters are analyzed. For better harmonic suppression, the amplification parameter of active power filter should be bigger, but it is restricted by system time delay, inductance of the power system, and parameters of the passive filters. With the above analysis, this paper proposes an on-line self adjustment technique which obtaining perfect harmonic suppression effects under different operation conditions.