基于PSCAD和MATLAB的电力系统电磁暂态仿真研究

基于PSCAD和MATLAB的电力系统电磁暂态仿真研究

摘要

电磁暂态的研究主要是针对电力系统出现故障时对系统参数进行分析。本文根据电力系统的故障分析理论，运用电磁暂态仿真软件PSCAD/EMTDC和系统仿真软件MATLAB，以双电源供电系统为模型分别对其进行了单相接地、两相相间短路及三相接地故障条件下的电磁暂态仿真分析，通过仿真结果比较，得出两种仿真环境下的仿真波形几乎一致，与故障分析算例基本吻合，这说明这两种仿真环境都适用于电力系统的电磁暂态仿真，但在故障设置方面，PSCAD的设置更为灵活方便。同时，由PSCAD建立一个简单的交直流传输系统为模型，根据PSCAD-MATLAB接口技术原理，实现了接口环境下的电磁暂态仿真研究，这说明了PSCAD-MATLAB接口仿真技术在电磁暂态分析中的有效性。

关键字：电磁暂态；PSCAD；MATLAB；接口技术

The simulation study for electromagnetic transient in power

system based on PSCAD and MATLAB

Abstract

Electro-magnetic transient research mainly aims at power system which for analysis of system parameters when it is malfunctioning. Based on the theory of fault analysis in power system, the usage of Power System Computer Aided Design/Electromagnetic Transients in DC system and Matrix Laboratory, as well as the model of two-source supply system, this paper mainly illustrates the simulation for electromagnetic transients through the application of a variety of faults, such as single-phase earth fault, inter-phase short circuit, and

three-phase grounding fault. By the comparison of simulation outcomes, it showed that the simulation waveforms under two kinds of simulation environment does almost unanimously which is similar to the example of fault analysis, the two simulation environments are suitable for the research of electromagnetic transients in power system. But in fault setting, the setting of PSCAD is more agile and convenient . Meanwhile, it presented the implementation of the simulation study for electromagnetic transient with the basis of the principle of

PSCAD-MATLAB interface techniques and the model established by PSCAD of a simple AC/DC transmission system, which has shown that the effectiveness of PSCAD-MA TLAB interface techniques in the study of electromagnetic transients.

Key words: electromagnetic transients; PSCAD; MATLAB; interface techniques

目录

摘要 .........................................................................................................................................I Abstract ...................................................................................................................................... II 第一章概述 (1)

1.1 国内系统事故概况 (1)

1.2 电力系统的电磁暂态数字仿真概述 (2)

1.3 本文主要工作 (3)

第二章电力系统的故障分析 (5)

2.1 电力系统的故障介绍 (5)

2.1.1 电力系统的短路故障概念和分类 (5)

2.1.2 电力系统的短路故障原因及其危害 (6)

2.2 电力系统的不对称故障分析方法—对称分量法 (7)

2.2.1 对称分量法原理 (7)

2.2.2 对称分量法的应用 (8)

2.2.3 正序等效定则 (10)

第三章基于PSCAD/EMTDC和MATLAB的电磁暂态仿真设计 (12)

3.1 PSCAD/EMTDC的工作环境介绍 (12)

3.2 MATLA的工作环境介绍 (15)

3.3 基于PSCAD和MATLAB的电力系统电磁暂态仿真设计 (19)

3.3.1 基于PSCAD交流电力网络的模型建立 (19)

3.3.2 基于MA TLAB交流电力网络的模型建立 (24)

3.3.3电力系统的故障设置 (28)