一种新型的并联型单相有源电力滤波器

通过分析并联型有源电力滤波器的工作原理和系统结构,本文提出一种新型的电流闭环预测控制策略,相比于传统的PI控制、滞环控制和预测控制算法,该预测策略能减小计算量,并降低模型的复杂度。同时,谐波电流检测电路采用单相电流延迟60°构造三相电流d-q变换法,获取逆变主电路的参考电流。该滤波系统还引入PI外环以稳定直流侧的电容电压。最后,采用S imu link的电力系统分析模块进行仿真。结果表明,该滤波系统可有效检测高次谐波分量,迅速补偿谐波电流,同理论分析一致。

A New Single-phase Shunt Active Power Filter

Through analyzing the basic principles and structure of active power filter（APF）,this paper proposes a new predictive control method on current closed loop control of APF.Meanwhile,harmonic current detecting circuit is set up by three-phase current d-q transform of single-phase current delaying 60°.The reference current generated by main inverter circuit can be calculated by fundamental component of load current.In addition,active power filter system,simulated with ＂SimPowerSystems Blockset＂ of Simulink,is combined with PI control to employ the steady DC（direct current） side capacitor voltage of converter.From the testing,the APF designed with the model detects and measures high order harmonic constituent and compensates current rapid.The result shows that it is coherence with theoretical analysis.