Control Strategy for Grid-Connected Three-Phase Inverters During Voltage Sags to Meet Grid Codes and to Maximize Power Delivery Capability
Control Strategy for Grid-Connected Three-Phase Inverters During Voltage Sags to Meet Grid Codes and to Maximize Power Delivery Capability
复制标题
电压暂降期间并网三相逆变器的控制策略，以满足电网规范并最大限度地提高电力输送能力
DOI：
10.1109/tpel.2018.2792478
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发表时间：
2018
影响因子：
6.7
通讯作者：
Ramón Guzmán
中科院分区：
文献类型：
--
作者：
Miguel Andrés Garnica López;José Luis García de Vicuña;J. Miret;M. Castilla;Ramón Guzmán
基于逆变器的分布式发电对新型电力系统的稳定性和可靠性起着至关重要的作用。在电压下降的情况下，这些系统必须根据电网规范（GCs）的严格要求保持与电网的连接。低压过流（LVRT）控制策略正成为电力电子研究的一个共同趋势。然而，先前对这些控制策略的研究并没有处理新gc提出的不同可能情况，其中许多研究都集中在数量非常有限的控制目标上。在本研究中，开发了一种最大化变换器性能的算法，并在不同电压跌落时进行了实验测试。在本研究中，基于几种严重程度的不平衡电压降，在考虑gc限制的情况下，确定了六种不同的电流注入情况。研究结果为开发适应分布式发电高集成度智能电网环境的柔性控制器迈出了一步。
Inverter-based distributed generation plays a vital role in the stability and reliability of new power systems. Under voltage sags, these systems must remain connected to the electrical network according to the stringent requirements of grid codes (GCs). Low-voltage ride-through (LVRT) control strategies are becoming a common trend in power electronics research. However, previous studies of these control strategies have not dealt with the different possible scenarios presented by new GCs, and many of them focus on a very limited number of control objectives. In this study, an algorithm to maximize the converter capabilities was developed and subjected to experimental tests during different voltage sags. In this research, based on unbalanced voltage drops of several severity levels, six different cases of current injection are identified while taking into consideration the restrictions imposed by GCs. The research results represent a further step toward the development of flexible controllers adaptable to the environments of intelligent electricity grids with high integration of distributed generation.