电力系统自动化课程设计

西安交通大学电力系统自动化课程设计报告

院(部)别信息科学与电气工程学院

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指导教师

课程设计任务书

题目电力系统自动化课程设计

院(部) 信息科学与电气工程学院

专业电气工程及其自动化

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12 月15日至12 月26 日共 2 周

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目录

第一章电力系统故障分析 (1)

1.1电力系统故障分析作用及意义 (1)

1.2电力系统故障概率 (1)

1.3 电力系统故障计算的基本原则和规定 (2)

1.4不对称故障分析概述 (3)

1.5不对称故障分析 (3)

1.6 不对称故障分析计算步骤 (4)

第二章纵向不对称故障分析 (5)

2.1纵向不对称故障分析 (5)

2.2断路故障的简略记号 (5)

2.3一相断相故障分析 (6)

第三章电力系统纵向故障分析实例计算分析 (8)

3.1电力系统纵向故障分析实例要求 (8)

3.2理论计算 (8)

3.3 Matlab计算过程 (10)

3.4.电力系统故障实例仿真模型及各模块参数设置 (12)

3.5仿真波形结果 (13)

课程总结 (17)

课程设计心得 (18)

附录 (19)

参考文献 (21)

摘要

在电力系统故障中，仅在一处发生不对称短路或断线的故障，称为简单不对称故障。它通常分为两类：①一类叫横向不对称故障，包括两相短路、单相接地短路以及两相接地短路三种类型。这种故障发生在系统中某一点的各相间或相与地之间，是处于网络三相支路的横向，故称为横向不对称故障。②另一类是发生在网络三相支路的纵向，叫纵向不对称故障，包括一相和两相断相两种基本类型。

不对称故障的分析计算是故障分析的基本内容之一。在电力系统设计和运行中，不对称故障时出现时各序对称分量以及各相电流、电压的分析计算，是选择电气设备、确定运行方式、整定继电保护、选用自动化设备和事故分析的重要依据。在电力系统各种故障中，不对称故障所占的比例很大。

当电力系统某点发生故障时，求出故障点处电流、电压的大小和特征，以及网络中其他位置（如继电保护安装处）电流、电压的大小和特征。

Abstract

In power system failure, occurs only asymmetrical short circuit or disconnection fault in one place, called simple asymmetrical fault. It is usually divided into two categories: ①a class called asymmetric transverse faults, including two-phase short circuit, single-phase and two-phase ground short circuit is shorted to ground three types. This failure occurs between a point in each phase or phase to ground system, is in a three-phase branch network landscape, it is called a lateral asymmetry fault. ②occurs in the network and the other is a three-phase vertical branch, called the vertical asymmetry failures, including an off-phase and two-phase two basic types.

Analysis and Calculation of asymmetry failure is one of the basic content of the fault analysis. In power system design and operation, when a fault occurs asymmetrical and symmetrical components of each sequence analysis to calculate the phase current, voltage, and is the choice of electrical equipment, determine the operating mode, relay setting, the choice of automation equipment and accident analysis of important in accordance with. Various failures in the power system, a large percentage of asymmetric fault.

When a point of power system failure, find fault current at the point, the size and characteristics of voltages, as well as other locations in the network (such as the installation of the relay) current, the size and characteristics of voltages.