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A Simple Method of Realization of Low Power Loss and High Compensation-Precision Active Power Filter

机译：一种实现低功耗和高补偿精度有源电力滤波器的简单方法

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摘要

In Active Power Filter (APF) application, LCL-filters are prevalently served as output filters due to high slew rate of compensation current and sufficient attenuation ratio for switching frequency with small LC parameters. In order to realize the stable control of LCL filters, appropriate damping is required. Both the classical PI control method with a damping resistor and active damping without the power loss on damping resistor are feasible, while the former method will induce unacceptable power loss under high power condition and the latter one may increase the complexity of control strategy as well as weaken system's robustness. In this paper, a double-loop control strategy for a 380V/264 kVA system with an inner current loop and an external repetitive control loop is proposed. Systematic design approaches of the double-loop control scheme have been given in details. The simulation experiment results indicate that it obtains low power loss reduced greatly from 1.8 kW (0.68%) to 0.8 kW (0.3%) and high compensation-precision with the proposed control scheme.
机译：在有源滤波器（APF）应用，LCL-滤波器普遍地担任输出滤波器由于补偿电流和用于与小LC参数的开关频率充分的衰减比的高转换速率。为了实现LCL滤波器的稳定的控制，需要适当的阻尼。都与一个阻尼电阻经典PI控制方法和活性无功率损耗上阻尼电阻阻尼是可行的，而前者的方法将诱导高功率条件下，不可接受的功率损耗和后者可以增加控制策略的复杂度以及削弱系统的鲁棒性。在本文中，用于与内部电流环路和外部重复控制回路中的380V / 264千伏安系统中的双回路控制策略提出。双回路控制方案的系统设计方法进行了详细说明。仿真实验结果表明，它获得低功率损失从1.8千瓦（0.68％）大大降低到0.8千瓦（0.3％）和高的补偿精度与所提出的控制方案。

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