arXivDaily arXiv每日学术速递 周一至周五更新
北美退伍军人节(Veterans Day),12 日无更新
arXiv 2406.15232eess.SYcs.SY
收藏

基于电流的模型预测脉冲模式控制用于风电场谐振阻尼

Damping Wind Farm Resonances with Current Based Model Predictive Pulse Pattern Control

Orcun Karaca, Ioannis Tsoumas, Tinus Dorfling, Ran Chen, Lennart Harnefors

AI总结:

针对传统线性电流控制器风电场谐振阻尼效果有限、低开关频率下优化脉冲模式加剧阻尼局限的问题,提出高带宽电流型模型预测脉冲模式控制器,可在低开关频率下实现高增益并拓宽阻尼频率范围,经多相中压风电系统数值验证有效。

摘要:

众所周知,比例电流控制增益可在变流器输出阻抗中模拟电阻效应。尽管该电阻可为电网谐振提供额外阻尼,但传统线性电流控制器的这一作用相当有限。此外,在中压系统中,由于开关损耗过高,无法采用高开关频率。为满足谐波标准,使用优化脉冲模式是适宜的做法,但这会进一步加剧传统控制器电阻效应的局限性——因为需要额外的滤波环节,使电流控制器仅作用于基波分量(而非纹波分量)。这种设计不仅限制了阻尼效应的幅值,还限制了其生效的频率范围。本文表明,高带宽的基于电流的模型预测脉冲模式控制器可缓解这些局限。该脉冲模式控制方法即使在低开关频率下也能实现高增益,同时直接控制瞬时电流(即同时控制基波分量和纹波分量)。借助快速执行周期,阻尼效应生效的频率范围可进一步拓宽。数值研究在多相中压风电变流系统中验证了这些优势。

英文摘要:

It is well-established that a proportional current control gain emulates a resistor in the converter output impedance. Even though this resistance can provide additional damping to grid resonances, its effect for traditional linear current controllers is known to be rather limited. Moreover, for medium-voltage systems, high switching frequencies are not an option due to the high switching losses. To meet the harmonic standards, it is expedient to use optimized pulse patterns. This further exacerbates the problems with the resistance of classical controllers, since an additional filtering would be required so that the current controller acts only on the fundamental component (and not on the ripple component). Such a design limits the damping effect not only in its amplitude but also in the frequency range where it is active. This paper shows that a high-bandwidth current-based model predictive pulse pattern controller can alleviate these limitations. The pulse pattern control approach can achieve a high gain even at low switching frequencies, while controlling directly the instantaneous currents (i.e., the fundamental component and the ripple together). With a fast implementation cycle, the frequency range where this damping effect is active can be further extended. Numerical studies showcase these benefits for a multi-phase medium-voltage wind power conversion system.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑