Method and system for deducing and evaluating freeze cascade failure of electro-gas integrated energy system
By establishing an integrated electric-gas energy system model and employing an improved Rosenbrock integral method and an adaptive variable step size algorithm, the problem of multi-timescale and multi-physical field coupling in electric-gas system freezing blockage faults was solved, achieving efficient fault inference and assessment, and improving the system's safety analysis under extreme cold conditions.
CN122414033APending Publication Date: 2026-07-17SOUTHEAST UNIV
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Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SOUTHEAST UNIV
- Filing Date
- 2026-04-17
- Publication Date
- 2026-07-17
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Figure CN122414033A_ABST
Abstract
本发明公开了一种电‑气综合能源系统冻堵级联故障推演与评估方法及系统，建立电‑气综合能源系统模型，构造管道数值边界并形成系统的非线性常微分‑代数模型；基于管内气体状态，判定冻堵形成的临界热力学条件，建立气‑固耦合的冻堵形成的动力学及管径演化模型；联立上述模型构建多时间尺度混合模型，并提出带有嵌入式变步长算法的改进Rosenbrock积分方法；最后求解模型得到系统演化的时间序列的故障推演与评估方法结果，包含气网温度、压强、质量流量、管道内径以及电网频率与电压等变量的时间序列，从中提取求解得到的各时刻气网节点压强、电网频率及电压波动序列计算评估指标，实现故障推演与评估。本发明方法将管网中慢动态的冻堵形成过程与电网中快动态的机电暂态过程进行统一耦合建模，在精确捕捉气压跌落引起的级联故障响应的同时，实现了积分步长的自动变化，提高了长周期故障推演与评估方法的速度。
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