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首页> 外文期刊>IEEE Transactions on Industrial Electronics >Virtual Inductance for Stable Operation of Grid-Interactive Voltage Source Inverters
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Virtual Inductance for Stable Operation of Grid-Interactive Voltage Source Inverters

机译：虚拟电感使电网交互式电压源逆变器稳定运行

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摘要

In this paper, a feedforward virtual inductance control strategy is developed for the stability of voltage source inverters (VSIs) in weak grids. A weak grid is characterized by a low short-circuit ratio and a low inertia constant, in which VSIs become susceptible to voltage distortions and instability. The proposed feedforward virtual inductance term is integrated into the current control loops of grid-tied VSIs. In this paper, the effectiveness of the virtual inductance control strategy in weak grids is first proved through closed-loop transfer function analysis and then the system's root locus analysis to determine the stability region of the system versus the grid impedance. The developed virtual inductance controller is also verified through laboratory experiments for different weak grid scenarios.
机译：本文针对弱电网中电压源逆变器（VSI）的稳定性，开发了一种前馈虚拟电感控制策略。弱电网的特点是短路率低和惯性常数低，其中VSI容易受到电压畸变和不稳定的影响。拟议的前馈虚拟电感项已集成到并网VSI的电流控制环路中。本文首先通过闭环传递函数分析证明了虚拟电感控制策略在弱电网中的有效性，然后通过系统的根轨迹分析来确定系统相对于电网阻抗的稳定区域。所开发的虚拟电感控制器也已通过实验室实验针对不同的弱电网场景进行了验证。

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