基于频域阻抗识别的电力电子主导电力系统稳定性适应努力量化新指标
A New Index for Quantifying Stability Adaptation Effort in Power Electronics-Dominated Power Systems Based on Frequency-Domain Impedance Identification
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中文总结 AI 辅助
本文提出适应努力指数（AEI），结合频域奈奎斯特稳定裕度与模态灵敏度，量化换流器恢复稳定性所需调整努力，并证明跟网型换流器适应成本更低。
中文摘要 AI 辅助
基于换流器的资源日益增多，使得现代电力系统的稳定性评估更具挑战性，尤其是因为许多设备仅以黑箱模型形式可用。传统的基于特征值的方法需要完整的动态表示，而基于广义奈奎斯特判据（GNC）的频域阻抗技术虽能提供稳定性洞察，但无法量化换流器需重新调整多少以恢复稳定性。本文提出了适应努力指数（AEI），该指标衡量主导模态对参数变化的灵敏度，并量化换流器在不稳定运行条件下重新配置所需的努力。AEI结合了从频域筛选获得的奈奎斯特稳定裕度与从黑箱阻抗数据合成的拟合状态空间模型导出的模态灵敏度指数。该方法应用于包含一个构网型换流器和一个跟网型换流器的系统。结果表明，尽管两个单元均可通过调整来稳定系统，但跟网型换流器所需的适应努力显著更少。因此，AEI提供了一种实用且模型无关的工具，用于识别在换流器主导电网中应重新配置哪个换流器，为系统运营商和制造商提供有价值的指导。
英文摘要
The increasing use of converter based resources has made stability assessment in modern power systems more challenging, particularly because many devices are available only as black box models. Conventional eigenvalue based methods require full dynamic representations, while frequency domain impedance techniques based on the Generalized Nyquist Criterion (GNC) provide stability insight but do not quantify how much a converter must be retuned to restore stability. This paper introduces the Adaptation Effort Index (AEI), a metric that measures the sensitivity of dominant modes to parameter variations and quantifies the effort required for a converter to reconfigure itself under unstable operating conditions. The AEI combines the Nyquist Stability Margin obtained from frequency domain screening with a modal sensitivity index derived from fitted state space models synthesized from black box impedance data. The method is applied to a system comprising a grid forming and a grid following converter. Results show that, although both units can be tuned to stabilize the system, the grid following converter requires significantly less adaptation effort. The AEI therefore provides a practical and model agnostic tool for identifying which converter should be reconfigured in converter dominated grids, offering valuable guidance for system operators and manufacturers.
发表机构
- Red Eléctrica – Redeia（西班牙电网公司 - Redeia）
- CITCEA – UPC（加泰罗尼亚理工大学电气与计算机工程研究中心）
机构由 AI 辅助整理，请以论文原文为准。
