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首页> 外文期刊>Electric power systems research >Supraharmonics emission from LED lamps: A reduction proposal based on random pulse-width modulation
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Supraharmonics emission from LED lamps: A reduction proposal based on random pulse-width modulation

机译：LED灯的超谐波发射：基于随机脉冲宽度调制的减少建议

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摘要

There is an outstanding concern from the international standard-setting community about harmonics distortion in the frequency range 2-150 kHz, referred to as supraharmonics. Power electronics has established as a ubiquitous technology, which plays a linchpin role in almost any electrical systems. The classical deterministic pulse-width modulation strategy, entailing at reducing low-frequency harmonics emission ( 2 kHz) in power converters, in a sense, bring them to move at the switching frequency and its multiple, in the kilohertz range. The amplitude of spectral components is the main concern when studying electromagnetic interference from active power factor correction stages, included in state-of-the-art LED drivers. Supraharmonics are nowadays the origin of numerous problems in electrical networks. The standardization bodies are presently updating the compatibility limits in the frequency range from 2 to 150 kHz. Supraharmonics behave differently from (lower frequency) harmonics, as reported in the literature. Fortunately, as will be demonstrated in this paper, it is possible to undertake this issue, from the very beginning, by leveraging technologies like random pulse-width modulation. An experimental system based on digitally controlled LED driver has been set up to evaluate the different methods. The algorithms have been implemented on a compactRIO controller incorporating an FPGA and a real-time processor.
机译：国际标准制定界非常关心2-150 kHz频率范围内的谐波失真，称为超谐波。电力电子技术已确立为无处不在的技术，它在几乎所有电气系统中都扮演着至关重要的角色。从某种意义上讲，经典的确定性脉冲宽度调制策略可降低功率转换器中的低频谐波发射（<2 kHz），从而使它们以千赫兹范围内的开关频率及其倍数移动。在研究来自有源LED驱动器中的有源功率因数校正级的电磁干扰时，频谱分量的幅度是主要关注的问题。如今，超谐波是电气网络中众多问题的根源。标准化机构目前正在更新2至150 kHz频率范围内的兼容性限制。如文献报道，超谐波的行为不同于（低频）谐波。幸运的是，正如本文将要证明的那样，有可能从一开始就通过利用诸如随机脉冲宽度调制之类的技术来解决这个问题。建立了一个基于数字控制的LED驱动器的实验系统，以评估不同的方法。该算法已在带有FPGA和实时处理器的compactRIO控制器上实现。

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