This article presents a direct power control (DPC) method to cover entire power limit area (PLA) of grid‐connected converter for Distributed Generation (DG) application. By using of the Lyapunov theory, an online decision‐making process is designed in which the optimum switching state of converter is determined only based on interactions between grid/converter voltages and power errors. The proposed method neither needs small sampling time nor system's parameters. In this paper, two major tracking indexes are evaluated throughout PLA: apparent power error and average switching frequency. This evaluations lead to a better analysis of the controllers' behavior across the entire operation range (ie, PLA). Effects of different sampling times and parameter mismatch are depicted in the results, which indicate optimum and reliable performances of the proposed method.

中文翻译：

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强大的直接功率控制和简单的在线评估，可用于分布式发电

本文提出了一种直接功率控制（DPC）方法，以覆盖分布式发电（DG）应用的并网转换器的整个功率限制区域（PLA）。利用李雅普诺夫理论，设计了一种在线决策过程，其中仅基于电网/转换器电压与功率误差之间的相互作用来确定转换器的最佳开关状态。所提出的方法既不需要很短的采样时间，也不需要系统的参数。在本文中，评估了整个PLA的两个主要跟踪指标：视在功率误差和平均开关频率。这种评估可以更好地分析整个操作范围（例如，PLA）中控制器的行为。结果描述了不同采样时间和参数不匹配的影响，