未知电网参数下三相并网逆变器的自同步电流控制

Joseph Latham, Moath H. A. Alqatamin, Z. T. Smith, B. Grainger, M. McIntyre
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引用次数: 3

摘要

用于并网应用的三相逆变器通常需要某种形式的电网电压相位检测,以便与电网适当同步并控制实功率和无功功率。这种相位检测通常基于某种类型的电网电压感应。然而,在本工作中,提出了一种方法,该方法可以准确地识别栅极的相位角,仅通过栅极电流反馈。该相位观测器被集成到电流控制器中,该控制器可以管理实功率和无功功率。该观测器/控制器组合系统的设计通过李雅普诺夫稳定性分析进行了激励和验证。为进一步验证和实现提供了各种工作条件下的控制器硬件在环结果。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Self-Synchronizing Current Control of a Three-Phase Grid- Connected Inverter in the Presence of Unknown Grid Parameters
Three-phase inverters for grid-connected applications typically require some form of grid voltage phase detection in order to properly synchronize to the grid and control real and reactive power generation. This phase detection is usually based upon some type of grid voltage sensing. However, in the present work a method is proposed whereby the phase angle of the grid can be accurately identified solely via the grid current feedback. This phase observer is incorporated into a current controller which can manage the real and reactive power. The design of this combined observer/controller system is motivated and validated via a Lyapunov stability analysis. Controller Hardware-in-the-Loop results under various operating conditions are provided for further validation and realization.
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