Non-linear adaptive hysteresis band pulse-width modulation control for hybrid active power filters to reduce switching loss
Non-linear adaptive hysteresis band pulse-width modulation control for hybrid active power filters to reduce switching loss
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DOI：
10.1049/iet-pel.2014.0824
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发表时间：
2015-11
影响因子：
2
通讯作者：
Lei Wang;C. Lam;M. Wong;N. Dai;Keng-Weng Lao;Chikong Wong
中科院分区：
文献类型：
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作者：
Lei Wang;C. Lam;M. Wong;N. Dai;Keng-Weng Lao;Chikong Wong
脉宽调制 (PWM) 在有源电力滤波器 (APF) 应用中得到了广泛研究。然而，由于 PWM 具有非线性电流特性，因此很少在混合 APF (HAPF) 应用中提出 PWM。本研究提出了一种适用于 HAPF 的非线性自适应滞环 PWM 控制器，以减少开关损耗并将总谐波失真 (THD) 保持在可接受的水平。与之前的研究相比，由于HAPF的耦合LC阻抗可以产生非线性补偿电流，因此利用准线性和非线性区域来获得低开关频率。此外，还提出了一种近似THD指标，以简化控制系统中的THD评估，从而实现更快的系统响应。最后，通过将仿真和实验结果与最先进的 HAPF PWM 进行比较，验证了非线性自适应滞环带控制器的性能。
Pulse-width modulations (PWMs) are widely investigated in active power filter (APF) applications. However, there are seldom PWMs proposed in hybrid APF (HAPF) applications because of their non-linear current characteristic. This study proposes a non-linear adaptive hysteresis band PWM controller for HAPFs to reduce the switching loss and keep the total harmonic distortion (THD) at an acceptable level. In contrast to previous studies, as the coupling LC impendence of an HAPF can yield a non-linear compensating current, the quasi-linear and non-linear regions are exploited to obtain a low switching frequency. In addition, an approximated THD index is proposed to assess THD in a simplified way in the control system, which results in a faster system response. Finally, the performance of the non-linear adaptive hysteresis band controller is verified by comparing simulation and experimental results with a state-of-the-art PWM for HAPFs.