Resonance damping techniques for grid-connected voltage source converters with LCL filters — A review
Resonance damping techniques for grid-connected voltage source converters with LCL filters — A review
复制标题
DOI：
10.1109/energycon.2014.6850424
复制
发表时间：
2014-05
期刊：
影响因子：
--
通讯作者：
Chi Zhang;T. Dragičević;J. Vasquez;J. Guerrero
中科院分区：
文献类型：
--
作者：
Chi Zhang;T. Dragičević;J. Vasquez;J. Guerrero
LCL滤波器在并网变流器中起着重要的作用，它可以减少注入电网的开关频率纹波电流。此外，它们的小尺寸和低成本使它们在许多实际应用中具有吸引力。然而，LCL滤波器是一个三阶系统，存在共振峰值频率。在高频率范围内，控制回路会产生振荡，特别是在双环控制变换器的电流回路。为了解决这一问题，人们提出了许多抑制共振的策略，包括被动和主动方法。本文对这些方法作一综述。
LCL filters play an important role in grid-connected converters when trying to reduce switching-frequency ripple currents injected into the grid. Besides, their small size and low cost make them attractive for many practical applications. However, the LCL filter is a third-order system, which presents a resonance peak frequency. Oscillation will occur in the control loop in high frequency ranges, especially in current loop in double-loops controlled converters. In order to solve this, many strategies have been proposed to damp resonance, including passive and active methods. This paper makes a review of these methods.