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arXiv 2501.03020eess.SYcs.SY
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面向低频减载的交流感知优化框架

AC-aware Optimization Framework for Under-Frequency Load Shedding

Mazen Elsaadany, Muhammad Hamza Ali, Amritanshu Pandey, Mads R. Almassalkhi

AI总结:

本文提出一种交流感知预测优化框架,利用模型降阶技术捕捉交流网络效应和调速器动态,周期性自适应调整低频减载设定值,在1,648节点系统上验证其优于静态及简化模型的自适应UFLS方案。

摘要:

低频减载(UFLS)用于在大扰动期间防止系统崩溃。分布式能源资源(DERs)渗透率的提高和系统惯量的降低,使得设计静态UFLS方案变得具有挑战性,该方案依赖预设的频率阈值和切负荷比例来在所有可能的运行条件下满足设计准则。由于非线性和可追溯性问题,以往的自适应UFLS方案使用简化的可处理频率模型,忽略了交流网络效应,例如电压依赖型负荷/发电。本文利用模型降阶技术获得系统频率动态的更高保真度低阶模型,该模型在纳入涡轮调速器动作及其相关限制的同时捕捉交流网络效应。然后将该模型用于一个新的交流感知预测优化框架中,以根据当前运行条件周期性地调整UFLS设定值,同时最小化切负荷量。在1,648节点系统上通过PSS/E仿真进行验证,所提出的方法在各种运行条件和扰动场景下均满足设计准则。此外,该框架优于传统的静态UFLS方案和基于简化动态模型的自适应UFLS方案。

英文摘要:

Under-frequency load shedding (UFLS) prevents system collapse during large disturbances. Increased penetration of distributed energy resources (DERs) and reduced system inertia makes it challenging to design a static UFLS scheme, which relies on preset frequency thresholds and load shed fractions to meet design criteria across all possible operating conditions. Due to non-linearity and traceability issues, previous adaptive UFLS schemes use simplified tractable frequency models that overlook AC network effects such as voltage-dependent load/generation. This paper leverages model order reduction techniques to obtain a higher fidelity low-order model of system frequency dynamics that captures AC network effects while incorporating turbine governor action and their associated limits. The model is then used in a new AC-aware predictive optimization framework to adapt UFLS setpoints periodically based on current operating conditions while minimizing load shed. Validated on a 1,648-bus system with PSS/E simulations, the proposed method meets design criteria under various operating conditions and disturbance scenarios. Furthermore, the framework outperforms conventional static UFLS schemes and adaptive UFLS schemes based on simplified dynamic models.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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