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给出了具有自适应谐波检测电路的单相并联型有源滤波器。设计和实现的有源滤波器采用了电压型脉宽调制（ＰＷＭ）功率逆变电路，定频开关电流跟随方式和基于干扰对消原理实现的模拟自适应谐波及无功检测电路。给出了电压型ＰＷＭ功率逆变器的数学模型和自适应谐波检测电路原理及硬件实现。详细讨论了限流电感及逆变器电容电压对补偿特性的影响，并给出了限流电感和储能电容器的选取条件。最后给出了并联型有源滤波器对感性及容性负载补偿的实验波形及分析。实验结果证实所提方案的正确性和实用性
The single-phase shunt active filter with adaptive harmonic detection circuit is given. The active filter designed and implemented uses voltage-based pulse-width modulation (PWM) power inverter, fixed-frequency switching current follower and analog adaptive harmonic and reactive power detection based on interference cancellation principle. The mathematical model of voltage-sourced PWM power inverter and the principle of adaptive harmonic detection circuit and its hardware implementation are given. The effects of current limiter inductor and inverter capacitor voltage on the compensation characteristics are discussed in detail, and the selection of current-limiting inductor and storage capacitor are given. Finally, the experimental waveforms and analysis of inductive and capacitive load compensation for shunt active power filter are given. The experimental results confirm the correctness and practicability of the proposed scheme