一种基于改进广义积分控制的有源滤波器谐波补偿方法

针对传统广义积分控制存在的稳定性问题，提出一种基于改进广义积分控制的谐波补偿方法，以增强有源电力滤波器的补偿性能。通过在传统广义积分控制器中引入一阶微分环节，抵消被控对象极点并等效降低系统阶数，从而使得系统相位裕度提升。同时构建同步旋转坐标系下的多通道改进广义积分控制结构，使得改进广义积分控制器数量和需整定的控制器参数减半，降低了设计复杂度且有效避免滤波频段交叉问题。接着开展离散域下的控制器关键参数影响特性分析，得到不同积分系数下的系统稳定性演化趋势，校核结果表明了参数设计的合理性。最后，通过仿真验证了所提方法的可行性和有效性。

A harmonic compensation method for an active power filter based on improved generalized integral control

There is a stability problem in traditional generalized integral control. We propose a harmonic compensation method based on improved generalized integral control to enhance the compensation performance of the active power filter. By introducing a first-order differential link into the traditional controller, the poles of the controlled object are cancelled and the order of the system is reduced, so the phase margin of the system is improved. At the same time, a multi-channel improved generalized integral control structure in the synchronous rotating coordinate system is constructed so that the number of improved controllers and the controller parameters to be set are reduced by half, the design complexity is reduced and the problem of filtering frequency cross is effectively avoided. Then the influence characteristics of the controller''s key parameters in the discrete domain are analyzed. The evolutionary trend of system stability under different integral coefficients is obtained and system stability check results show that the parameter design is reasonable. Finally, the feasibility and effectiveness of the proposed method are verified by simulation.