基于Davis-Wielandt（DW）壳量化异构构网型装置对电力系统动态特性的影响
Impacts of Heterogeneous Grid-Forming Devices on Power System Dynamics Quantified by DW Shells
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中文总结 AI 辅助
本文提出基于Davis-Wielandt（DW）壳的方法，无需异构构网型（GFM）换流器的详细参数，通过定义其局部无源性和虚轴指标，量化分析异构GFM装置对含跟网型（GFL）换流器的电力系统动态特性及稳定性的影响。
中文摘要 AI 辅助
构网型（GFM）换流器的概念在过去几年中受到了极大关注。然而，分析和量化异构GFM装置（例如GFM储能系统、GFM风电机组、GFM高压直流（HVDC）换流站）对电力系统动态特性的影响仍然具有挑战性，尤其是在考虑GFM换流器与跟网型（GFL）换流器之间复杂相互作用的情况下。为此，本文聚焦于包含GFM和GFL换流器的电力系统的分散式、可扩展稳定性分析，其中我们使用Davis-Wielandt（DW）壳来表征换流器和电网的动态特性。特别地，我们通过解析推导得出异构GFM换流器的接入如何影响电网的DW壳，进而影响系统稳定性。我们的方法不需要GFM换流器的详细参数或控制策略；相反，我们定义了GFM换流器的局部无源性和虚轴指标，以简洁地描述其特性。这两个指标可通过对GFM换流器进行测试方便地获得，在处理大规模电力系统时极大地简化了稳定性分析与计算工作。
英文摘要
The concept of grid-forming (GFM) converters has gained great attention in the past years. However, it remains challenging to analyze and quantify the impacts of heterogeneous GFM devices (e.g., GFM energy storage systems, GFM wind turbines, GFM HVDC stations) on power system dynamics, especially when taking into account the complex interaction between GFM converters and grid-following (GFL) converters. To this end, this paper focuses on the decentralized and scalable stability analysis of power systems containing both GFM and GFL converters, where we use Davis-Wielandt (DW) shells to characterize the dynamics of the converters and the power grid. In particular, we analytically derive how integrating heterogeneous GFM converters affects the DW shell of the power grid and therefore the system stability. Our approach does not require the detailed parameters or control schemes of the GFM converters; instead, we define the local passivity and imaginary-axis indices of GFM converters to compactly describe their characteristics. These two indices can be conveniently obtained by testing a GFM converter and greatly simplify the stability analysis and computation when handling large-scale power systems.
