摘 要
短路电流计算是电气工程领域中的关键问题，直接影响电力系统的安全稳定运行和设备选型设计。随着现代电网规模的不断扩大以及新能源接入比例的提升，传统短路电流计算方法面临诸多挑战。为此，本文旨在深入研究短路电流的计算与分析方法，提出一种结合系统参数动态调整和非线性负载特性的新型算法。研究基于对称分量法和节点导纳矩阵理论，通过引入改进的迭代求解策略，实现了对复杂电网中短路电流的精确计算。同时，针对分布式电源接入场景，提出了考虑逆变器控制特性的短路电流贡献模型，显著提高了计算结果的准确性。仿真结果表明，所提方法在不同工况下均表现出良好的收敛性和适应性，能够有效应对高渗透率新能源接入带来的不确定性。
关键词：短路电流计算 复杂电网 非线性负载特性
Abstract
Short circuit current calculation is a key problem in the field of electrical engineering, which directly affects the safe and stable operation of power system and equipment selection design. With the continuous expansion of the scale of modern power grid and the increase of the proportion of new energy access, the traditional short-circuit current calculation method faces many challenges. Therefore, this paper aims to study the calculation and analysis method of short-circuit current, and propose a new algorithm combining the dynamic adjustment of system parameters and nonlinear load characteristics. Based on the symmetry component method and the node conduction matrix theory, the short circuit current in the complex grid. At the same time, for the distributed power access scenario, the short-circuit current contribution model considering the control characteristics of the inverter is proposed, which significantly improves the accuracy of the calculation results. The simulation results show that the proposed method shows good convergence and adaptability under different working conditions, and can effectively deal with the uncertainty brought by new energy access with high permeability.
Keyword:Short Circuit Current Calculation Complex Power Grid Nonlinear Load Characteristics
目 录
1绪论 1
1.1短路电流计算的研究背景与意义 1
1.2国内外短路电流研究现状分析 1
1.3本文短路电流计算的研究方法 1
2短路电流的基本理论与模型 2
2.1短路电流的定义与分类 2
2.2短路电流的数学模型建立 2
2.3不同类型短路的特性分析 3
3短路电流计算方法与工具 3
3.1常用短路电流计算方法概述 4
3.2数值计算法在短路电流中的应用 4
3.3短路电流计算软件及其实现 5
4短路电流对系统的影响与防护措施 5
4.1短路电流对电气设备的影响分析 5
4.2短路电流限制技术的研究与应用 6
4.3系统保护策略与短路电流的关系 6
结论 7
参考文献 8
致谢 9
短路电流计算是电气工程领域中的关键问题，直接影响电力系统的安全稳定运行和设备选型设计。随着现代电网规模的不断扩大以及新能源接入比例的提升，传统短路电流计算方法面临诸多挑战。为此，本文旨在深入研究短路电流的计算与分析方法，提出一种结合系统参数动态调整和非线性负载特性的新型算法。研究基于对称分量法和节点导纳矩阵理论，通过引入改进的迭代求解策略，实现了对复杂电网中短路电流的精确计算。同时，针对分布式电源接入场景，提出了考虑逆变器控制特性的短路电流贡献模型，显著提高了计算结果的准确性。仿真结果表明，所提方法在不同工况下均表现出良好的收敛性和适应性，能够有效应对高渗透率新能源接入带来的不确定性。
关键词：短路电流计算 复杂电网 非线性负载特性
Abstract
Short circuit current calculation is a key problem in the field of electrical engineering, which directly affects the safe and stable operation of power system and equipment selection design. With the continuous expansion of the scale of modern power grid and the increase of the proportion of new energy access, the traditional short-circuit current calculation method faces many challenges. Therefore, this paper aims to study the calculation and analysis method of short-circuit current, and propose a new algorithm combining the dynamic adjustment of system parameters and nonlinear load characteristics. Based on the symmetry component method and the node conduction matrix theory, the short circuit current in the complex grid. At the same time, for the distributed power access scenario, the short-circuit current contribution model considering the control characteristics of the inverter is proposed, which significantly improves the accuracy of the calculation results. The simulation results show that the proposed method shows good convergence and adaptability under different working conditions, and can effectively deal with the uncertainty brought by new energy access with high permeability.
Keyword:Short Circuit Current Calculation Complex Power Grid Nonlinear Load Characteristics
目 录
1绪论 1
1.1短路电流计算的研究背景与意义 1
1.2国内外短路电流研究现状分析 1
1.3本文短路电流计算的研究方法 1
2短路电流的基本理论与模型 2
2.1短路电流的定义与分类 2
2.2短路电流的数学模型建立 2
2.3不同类型短路的特性分析 3
3短路电流计算方法与工具 3
3.1常用短路电流计算方法概述 4
3.2数值计算法在短路电流中的应用 4
3.3短路电流计算软件及其实现 5
4短路电流对系统的影响与防护措施 5
4.1短路电流对电气设备的影响分析 5
4.2短路电流限制技术的研究与应用 6
4.3系统保护策略与短路电流的关系 6
结论 7
参考文献 8
致谢 9
