摘 要
电力系统电磁暂态过程的研究对于保障电网安全稳定运行具有重要意义，尤其是在新能源接入和复杂电网结构日益普遍的背景下，深入分析电磁暂态特性显得尤为关键。本文旨在通过构建精确的仿真模型和采用先进的数值分析方法，研究电力系统中典型电磁暂态现象的发生机理及其对系统稳定性的影响。研究基于PSCAD/EMTDC等专业仿真平台，结合时域有限差分法与状态空间建模技术，实现了对故障瞬态、谐振现象及换流过程的高精度模拟。通过对实际电网案例的分析，验证了所提方法在捕捉快速动态变化和非线性行为方面的有效性。研究结果表明，所建立的仿真框架能够准确反映复杂电磁暂态过程，并为保护装置的设计和控制策略优化提供了重要参考。本文的主要创新点在于提出了一种融合多时间尺度特性的建模方法，显著提升了仿真效率与精度；同时，针对新能源接入场景下的特殊暂态问题，提出了改进的数值求解算法，有效解决了传统方法在收敛性和稳定性方面的不足。研究成果不仅深化了对电磁暂态过程的理解，还为现代电力系统的规划与运行提供了理论支持和技术保障。
关键词：电磁暂态；仿真建模；新能源接入；数值分析方法；多时间尺度特性
ABSTRACT
The study of electromagnetic transient processes in power systems is of great significance for ensuring the safe and stable operation of the grid, particularly in the context of increasing integration of renewable energy sources and the prevalence of complex grid structures. In-depth analysis of electromagnetic transient characteristics becomes even more critical under these circumstances. This paper aims to investigate the underlying mechanisms of typical electromagnetic transient phenomena in power systems and their impacts on system stability by constructing accurate simulation models and employing advanced numerical analysis methods. Based on professional simulation platforms such as PSCAD/EMTDC, combined with the finite-difference time-domain method and state-space modeling techniques, high-precision simulations of fault transients, resonance phenomena, and commutation processes have been achieved. Through the analysis of practical power grid cases, the effectiveness of the proposed methods in capturing fast dynamic changes and nonlinear behaviors has been validated. The results indicate that the established simulation fr amework can accurately reflect complex electromagnetic transient processes and provides essential references for the design of protection devices and the optimization of control strategies. The primary innovation of this paper lies in the proposal of a modeling method that integrates multi-time-scale characteristics, which significantly enhances simulation efficiency and accuracy. Additionally, an improved numerical solution algorithm is presented for addressing specific transient issues in scenarios involving renewable energy integration, effectively resolving the deficiencies of traditional methods in terms of convergence and stability. The research not only deepens the understanding of electromagnetic transient processes but also offers theoretical support and technical assurance for the planning and operation of modern power systems.
Keywords: Electromagnetic Transient; Simulation Modeling; New Energy Integration; Numerical Analysis Method; Multi-Time Scale Characteristics
目 录
摘 要 I
ABSTRACT II
第1章 绪论 1
1.1 电力系统电磁暂态过程的研究背景 1
1.2 电磁暂态仿真与分析的意义与价值 1
1.3 国内外研究现状与发展趋势 2
1.4 本文研究方法与技术路线 2
第2章 电磁暂态过程的理论基础 3
2.1 电磁暂态的基本概念与特性 3
2.2 暂态过程的数学模型与方程 3
2.3 关键元件的暂态响应分析 4
2.4 电磁暂态仿真的基本原理 4
2.5 理论基础对仿真的支撑作用 5
第3章 电磁暂态仿真的建模与实现 6
3.1 仿真软件平台的选择与评估 6
3.2 电力系统元件的建模方法 6
3.3 暂态过程仿真的算法设计 7
3.4 典型场景下的仿真案例分析 7
3.5 仿真结果的验证与误差分析 8
第4章 电磁暂态过程的应用与优化 9
4.1 故障分析中的暂态过程研究 9
4.2 暂态稳定性对系统运行的影响 9
4.3 基于仿真的控制策略优化 10
4.4 新能源接入对暂态过程的影响 10
4.5 提高仿真精度的技术路径 11
结论 12
参考文献 13
致 谢 14
