| 低开关频率下PWM整流器电流控制策略研究 |
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| 引用本文： | 邱亮明,张 琪,程善美,等.低开关频率下PWM整流器电流控制策略研究[J].电力科学与工程,2014(5):34-40. |
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| 作者姓名： | 邱亮明 张 琪 程善美 等 |
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| 作者单位： | [1]华中科技大学自动化学院,湖北武汉430074; [2]武汉征原电气有限公司,湖北武汉430012 |
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| 摘 要： | 谐波污染是单相PWM整流器控制的主要问题之一,而电流控制策略是谐波抑制的重要研究方向。充分考虑低开关频率对系统性能的影响,采用提高采样频率的方法,提出一种改进的基于重复控制的复合电流控制策略。此策略抑制了低开关频率对补偿效果的影响,实现了无稳态误差控制,抑制输入电流的周期性谐波,改善了波形质量。仿真验证该控制策略是有效可行的。
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| 关 键 词： | 重复控制 低开关频率 采样频率 PWM整流器 |
Research on Current Control Strategy of Low Switching Frequency PWM Rectifier |
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| Affiliation: | Qiu Liangming, Zhang Qi, Cheng Shanmei, Sun Dejin ( 1. School of Automation, Huazhong University of Science and Technology, Wuhan 430074, China; 2. Wuhan Zhengyuan Electric Co. , Ltd. , Wuhan 430012, China) |
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| Abstract: | Harmonic was the main problem for controlling the single-phase rectifier, while the current control strategy was an important research aspect to restrain harmonic. A compound current control strategy with an improved repetitive controller was proposed. Considering the effect of the low switching frequency on the performance of the system, the strategy increased the sample frequency. The strategy restrained the influence of low switching frequen- cy, achieved zero steady-state error, suppressed the periodic harmonic in the AC current, and improved the wave quality. The simulation and experiment proved that this control strategy was effectual and feasible. |
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| Keywords: | repetitive controller low switching frequency sample frequency PWM rectifier |
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