An Online Transient Stability Control Strategy Based on Post-Disturbance Equilibrium Point Continuation: Calculation of Post-Disturbance Equilibrium Points

LI Chongtao; ZHANG Jianxin; HE Jingjie; LIU Yuming; LI Shiyang; GAO Qin; DUAN Chao

doi:10.7652/xjtuxb202509002

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An Online Transient Stability Control Strategy Based on Post-Disturbance Equilibrium Point Continuation: Calculation of Post-Disturbance Equilibrium Points

更新时间：2025-09-11

- An Online Transient Stability Control Strategy Based on Post-Disturbance Equilibrium Point Continuation: Calculation of Post-Disturbance Equilibrium Points
- Journal of Xi’an Jiaotong University Vol. 59, Issue 9, Pages: 11-21(2025)
- 作者机构：
  
  1.西安交通大学电气工程学院， 710049，西安
  2.中国南方电网电力调度控制中心， 510663，广州
  3.南方电网科学研究院， 510663，广州
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb202509002
  CLC： TM712
- Received：22 March 2025，
  
  Online First：26 May 2025，
  
  Published：10 September 2025
- 稿件说明：
移动端阅览
LI Chongtao, ZHANG Jianxin, HE Jingjie, et al. An Online Transient Stability Control Strategy Based on Post-Disturbance Equilibrium Point Continuation: Calculation of Post-Disturbance Equilibrium Points[J]. Journal of Xi’an Jiaotong University, 2025, 59(9): 11-21.
DOI：

LI Chongtao, ZHANG Jianxin, HE Jingjie, et al. An Online Transient Stability Control Strategy Based on Post-Disturbance Equilibrium Point Continuation: Calculation of Post-Disturbance Equilibrium Points[J]. Journal of Xi’an Jiaotong University, 2025, 59(9): 11-21. DOI： 10.7652/xjtuxb202509002.

摘要

针对传统潮流计算模型在电力系统受扰后平衡点计算中的局限性，提出一种考虑动态元件稳态运行特性的受扰后系统平衡点计算方法。首先，从代数方程角度出发，构建了包含电源、负荷及网络的受扰后平衡点分析模型；之后，基于同伦法给出了受扰后系统平衡点的高效求解步骤，解决了严重扰动下牛顿法收敛困难的问题；最后，采用IEEE 39节点标准算例及省级实际电网算例验证了所提方法。结果表明：所建模型适用于包括新能源在内的动态元件，具有较强的通用性；所提计算方法与暂态仿真计算方法的收敛结果完全相符，且收敛耗时减少了95%以上，准确性相比传统的潮流方法提高了至少3个数量级，为受扰后系统的快速在线稳定性评估提供了高效解析工具。

Abstract

To address the limitations of traditional power flow models in calculating post-disturbance equilibrium points in power systems

a method for calculating post-disturbance system equilibrium points that accounts for the steady-state operating characteristics of dynamic components is proposed. First

from the perspective of algebraic equations

an analytical model for post-disturbance equilibrium points is constructed

incorporating power sources

loads

and the network. Subsequently

based on the homotopy method

an efficient solution procedure for post-disturbance system equilibrium points is presented

resolving the convergence challenges of the Newton method under severe disturbances. Finally

the proposed method is validated using the IEEE 39-bus standard test case and a provincial real-world grid case. The results demonstrate that the developed model is applicable to dynamic components

including renewable energy sources

exhibiting strong generality. The proposed calculation method yields results fully consistent with transient simulation outcomes while reducing convergence time by over 95%. Compared to traditional power flow methods

its accuracy is improved by at least three orders of magnitude

providing an efficient analytical tool for rapid online stability assessment of post-disturbance systems.

关键词

Keywords

references

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