A Corrective Scheme to Prevent Adverse Dynamic Interaction of Grid-forming Inverters
A Corrective Scheme to Prevent Adverse Dynamic Interaction of Grid-forming Inverters
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DOI：
10.1109/isgt51731.2023.10066342
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发表时间：
2023-01
期刊：
影响因子：
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通讯作者：
Muhammad F. Umar;Mohsen Hosseinzadehtaher;M. Shadmand;H. Livani;Mohammed Ben-Idris
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文献类型：
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作者：
Muhammad F. Umar;Mohsen Hosseinzadehtaher;M. Shadmand;H. Livani;Mohammed Ben-Idris
本文提出了一种控制方案，防止不利的动态交互之间的异质控制的并网逆变器（GFMI）在电力电子主导电网（PEDG）向弹性自驱动电网。电网集群中GFMI的主控制器可以基于其制造商而变化，例如虚拟同步发电、下垂控制、功率同步控制等。因此，这可以在PEDG中的GFMI网络之间引入异构性。因此，在基于异构主控制器的GFMI互连过程中，对PEDG的同步和动态交互提出了各种挑战。例如，频率和电压的剧烈波动、高ROCOF、对PEDG的整体暂态稳定性构成威胁的非预期无功功率环流。因此，为了减轻这些不利的动态相互作用之间的异质控制GFMI，力包围均匀化（FEH）控制提出了在监督级控制器。这将自主地调整每个GFMI的惯性系数，以具有均匀的瞬态响应，并将在异质DG之间实施一致性。这将防止PEDG在互连和负载扰动期间的不利动态相互作用。各种案例研究，验证了所提出的FEH控制的有效性。
This paper proposes a control scheme that prevents the adverse dynamic interactions between the heterogeneously controlled grid-forming inverters (GFMI) in power electronics dominated grid (PEDG) towards a resilient self-driving grid. The primary controller of GFMIs in a grid cluster can vary based on their manufacturers such as virtual synchronous generation, droop control, power synchronization control, etc. Therefore, this can introduce heterogeneity among the network of GFMIs in PEDG. Resultantly, during the interconnection of GFMIs that are based on heterogenous primary controller poses various synchronization and dynamic interaction challenges in PEDG. For instance, severe fluctuations in frequency and voltage, high ROCOF, unintended reactive power circulation that poses a threat on the overall transient stability of the PEDG. Therefore, to mitigate these adverse dynamic interactions among the heterogeneously controlled GFMIs, a force enclaved homogenization (FEH) control is proposed in a supervisory level controller. This will autonomously adjust inertia coefficients of the each GFMI to have homogenous transient response and will enforce coherency among the heterogenous DGs. This will prevent the PEDG from the adverse dynamic interactions during an interconnection and load disturbance. Various case studies are presented that validates the effectiveness of the proposed FEH control.