并联混合型有源电力滤波器的自抗扰控制策略

为了提高并联混合型有源电力滤波器性能，提出一种基于线性自抗扰的特定次谐波补偿控制策略。通过建立并联混合型有源电力滤波器的数学模型，结合自抗扰控制的特点，将三阶系统控制问题简化成一阶自抗扰控制问题。同时，设计了谐波电流跟踪的一阶线性自抗扰控制器和直流母线电压的双闭环自抗扰控制器。最后通过仿真对比传统比例积分(PI)控制，发现该策略使谐波电流跟踪稳定性更强，直流侧电压超调为0，有效抑制电流和电压冲击，补偿后电网电流谐波畸变率为1.26%。结果表明所设计的一阶线性自抗扰控制策略具有良好的跟踪和抗干扰能力，且算法简单，具有一定的工程应用价值。

Active Disturbance Rejection Controller Strategy for Shunt Hybrid Active Power Filters

To improve the performance of shunt hybrid active power filter, a specific sub-harmonic compensation control strategy based on linear active disturbance rejection controller is proposed. By establishing a mathematical model of the shunt hybrid active power filter, the third-order system control problem is simplified into a first-order active disturbance rejection control problem by combining the characteristics of active disturbance rejection control. At the same time, a first-order active disturbance rejection control for harmonic current tracking and a double-closed-loop active disturbance rejection control for the DC bus voltage are designed. Finally, by comparing the traditional PI control through simulation, the strategy makes the harmonic current tracking more stable, the DC-side voltage overshoot is 0, and the current and voltage shocks are effectively suppressed. The harmonic distortion of the grid current after compensation is 1.26%. The results show that the control strategy has good tracking and anti-disturbance capability, the algorithm is simple and has some engineering application value.