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Modeling Techniques and Stability Analysis Tools for Grid-Connected Converters
IEEE Open Journal of Power Electronics Pub Date : 2022-07-12 , DOI: 10.1109/ojpel.2022.3190103
Qilin Peng 1 , Giampaolo Buticchi 1 , Nadia M. L. Tan 1 , Sandro Guenter 1 , Jiajun Yang 2 , Patrick Wheeler 3
Affiliation  

Large-scale integration of renewable generation interfaced to the network through power electronic converters has led to drastic changes in power system dynamics. In islanded microgrids or weak grids, different control concepts for the synchronization of converters have been proposed to provide virtual inertia and improve their resilience against transient events, ensuring safe operation without heavy redundant design. The complexity of these power-related control algorithms and their interaction with the inner control loops causes problems in frequency components above the range of traditional studies which calls on modeling techniques with a wider bandwidth. This work aims to provide an outline of modeling methods for grid-connected converter dynamics from subsynchronous to switching sideband frequency range and relevant analyzing tools. The major contributions of this work are: 1. Theoretical foundations and the derivation processes are discussed for each of the modeling methods within the time domain, frequency domain and harmonic domain. 2. Similarities and differences between these methods are highlighted and recommendations are given regarding different grid situations. 3. A case study with an active front end converter is shown and the analysis results are validated by simulation and Hardware-in-the-Loop (HiL) test, illustrating the effectiveness of these methods.

中文翻译:

并网变流器的建模技术和稳定性分析工具

通过电力电子转换器与网络连接的可再生能源大规模集成已导致电力系统动态发生巨大变化。在孤岛微电网或弱电网中,已经提出了用于变流器同步的不同控制概念,以提供虚拟惯性并提高其对瞬态事件的弹性,确保安全运行而无需大量冗余设计。这些与功率相关的控制算法的复杂性及其与内部控制回路的相互作用导致频率分量的问题超出了传统研究的范围,这需要具有更宽带宽的建模技术。本工作旨在概述从次同步到开关边带频率范围的并网转换器动力学建模方法和相关分析工具。这项工作的主要贡献是: 1. 讨论了时域、频域和谐波域内每种建模方法的理论基础和推导过程。2.强调了这些方法之间的异同,并针对不同的电网情况给出了建议。3. 展示了一个有源前端转换器的案例研究,并通过仿真和硬件在环 (HiL) 测试验证了分析结果,说明了这些方法的有效性。强调了这些方法之间的异同,并就不同的电网情况给出了建议。3. 展示了一个有源前端转换器的案例研究,并通过仿真和硬件在环 (HiL) 测试验证了分析结果,说明了这些方法的有效性。强调了这些方法之间的异同,并就不同的电网情况给出了建议。3. 展示了一个有源前端转换器的案例研究,并通过仿真和硬件在环 (HiL) 测试验证了分析结果,说明了这些方法的有效性。
更新日期:2022-07-12
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