| 引用本文: | 李晨,林涛,叶畅,林政阳,李君,徐遐龄.新能源并网系统控制/运行参数小干扰稳定域快速构建方法[J].电力自动化设备,2025,45(6):156-163. |
| LI Chen,LIN Tao,YE Chang,LIN Zhengyang,LI Jun,XU Xialing.Fast construction method for control/operation parameter small-signal stability region of renewable energy grid-connected system[J].Electric Power Automation Equipment,2025,45(6):156-163. |
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| 摘要: |
| 由于新型电力系统运行工况变化频繁、不同工况下系统小干扰稳定性差异较大，面向当前运行工况下系统小干扰稳定性的在线评估和预警，有必要研究高效的控制/运行参数稳定域快速构建方法。基于新能源并网系统的阻抗模型及广义奈奎斯特稳定判据，结合盖尔圆盘定理对含控制/运行参数的回率矩阵的特征根轨迹分布范围进行估计并将其作为约束，提出通过反演快速构建控制/运行参数稳定域的方法，从而提高稳定域构建效率，以适应在线应用需求。在求得基本稳定域的基础上，进一步采用最优相似变换对盖尔圆盘的尺寸进行优化，扩展稳定域范围，降低其保守性。算例仿真结果表明，所提方法可以快速确定控制/运行参数的稳定域并降低其保守性。 |
| 关键词: 小干扰稳定 阻抗分析法 控制/运行参数稳定域 盖尔圆盘定理 最优相似变换 新能源 |
| DOI：10.16081/j.epae.202503025 |
| 分类号:TM76 |
| 基金项目:国家电网有限公司科技项目(5100?202399374A?2?2?ZB) |
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| Fast construction method for control/operation parameter small-signal stability region of renewable energy grid-connected system |
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LI Chen1, LIN Tao1, YE Chang2, LIN Zhengyang1, LI Jun1, XU Xialing3
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1.School of Electrical Engineering and Automation, Wuhan University, Wuhan 430072, China;2.State Grid Hubei Electric Power Co.,Ltd.,Wuhan 430077, China;3.Central China Branch of State Grid Corporation of China, Wuhan 430077, China
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| Abstract: |
| Due to the frequent changes in operating conditions of new power system and the large difference of system small-signal stability under different operating conditions, it is necessary to study an efficient fast construction method of control/operation parameter stability region for the online evaluation and early warning of system small-signal stability under current operating conditions. Based on the impedance model of renewable energy grid-connected system and the generalized Nyquist stability criterion, and combined with Gerschgorin disk theory, the eigenvalue trajectory distribution range of the return rate matrix with control/operation parameters is estimated and taken as the constraint. Then, a rapid construction method of control/operation parameter stability region via inversion is proposed to improve the construction efficiency of stability region and meet the requirements of online application. Based on the obtained basic stability region, the optimal similarity transformation is used to optimize the size of the Gerschgorin disk, expanding the range of the stability region and reducing its conservativeness. The simulative results show that the proposed method can quickly determine the control/operation parameter stability region and reduce its conservativeness. |
| Key words: small-signal stability impedance analysis method control/operation parameter stability region Gerschgorin disk theory optimal similarity transformation renewable energy |
