Voltage Stability Assessment of AC/DC Hybrid Microgrid
Voltage Stability Assessment of AC/DC Hybrid Microgrid
复制标题
DOI：
10.3390/en16010399
复制
发表时间：
2022-12
期刊：
影响因子：
3.2
通讯作者：
Fangyuan Chang;J. O'donnell;Wencong Su
中科院分区：
文献类型：
--
作者：
Fangyuan Chang;J. O'donnell;Wencong Su
AC/DC混合微电网由于可再生能源（例如光伏发电、电池储能系统和风力涡轮机）的激增而变得潜在地更具吸引力。当多种类型的发电机和负载在配电层共存时，AC子微电网和DC子微电网的协作提高了操作效率。然而，AC/DC混合微电网的电压稳定性分析和软件验证是一个关键问题，特别是随着电力电子器件和各种类型的发电的越来越多的采用。在本文中，我们研究了具有并网和并网跟随功率转换器的AC/DC混合微电网的建模。我们提出了一种快速的仿真技术，以减少仿真运行时间与可接受的错误。此外，我们讨论了混合微电网的稳定性与不同类型的故障和功率失配。特别是，我们检查电压的最低点，以评估混合微电网的暂态稳定性。我们也设计了下垂控制器来调节潮流和减轻电压不稳定。在研究过程中，建立了基于Simulink的微电网运行分析仿真平台。
AC/DC hybrid microgrids are becoming potentially more attractive due to the proliferation of renewable energy sources, such as photovoltaic generation, battery energy storage systems, and wind turbines. The collaboration of AC sub-microgrids and DC sub-microgrids improves operational efficiency when multiple types of power generators and loads coexist at the power distribution level. However, the voltage stability analysis and software validation of AC/DC hybrid microgrids is a critical concern, especially with the increasing adoption of power electronic devices and various types of power generation. In this manuscript, we investigate the modeling of AC/DC hybrid microgrids with grid-forming and grid-following power converters. We propose a rapid simulation technique to reduce the simulation runtime with acceptable errors. Moreover, we discuss the stability of hybrid microgrids with different types of faults and power mismatches. In particular, we examine the voltage nadir to evaluate the transient stability of the hybrid microgrid. We also design a droop controller to regulate the power flow and alleviate voltage instability. During our study, we establish a Simulink-based simulation platform for operational analysis of the microgrid.