向阳变电站高压侧继电保护设计与案例分析

论文总字数：31022字

摘 要

目前，我国电力行业大步前进。其中，继电保护作为电力行业中必不可少的一环也在快速发展。本次毕业设计的220kV向阳变电站就是这一设计背景。在电网运行时，输电线路发生两相和三相短路故障的可能性较大，可以采取距离保护和零序保护等；对于母线保护主要是采用比率差动保护原理对母线进行差动保护。

220kV向阳变电站的高压侧线路和母线保护进行故障分析、整定与事故案例分析。其中，故障分析中的主要步骤有绘制故障点序网图，并根据故障点序网图计算出变压器高压侧、中压侧、低压侧以及220kV、110kV、35kV线路等处的三相短路和不对称短路电流计算等。整定计算中，重点包括220kV母线、220kV母联以及220kV出线整定，参考了各类设备的说明书。最后参考文献及相关资料对继电保护事故预防进行了专题研究以及案例分析。可有效培养工程服务于社会的意识，理解电力系统继电保护的重要性，熟悉电力系统继电保护相关工作流程。

关键词：变电站；继电保护；故障分析；整定计算；事故预防

Design and Case Study of High-voltage Side Relay Protection of Xiangyang Substation

Abstract

At present, my country's power industry is making great strides. Among them, relay protection, as an indispensable part of the power industry, is also developing rapidly. The 220kV Xiangyang Substation of this graduation design is the background of this design. When the power grid is running, the possibility of two-phase and three-phase short-circuit faults on the transmission line is relatively high, and distance protection and zero-sequence protection can be adopted; for busbar protection, the principle of ratio differential protection is mainly used to differentially protect the busbar.

The high-voltage side line and busbar protection of the 220kV Xiangyang Substation are subjected to fault analysis, setting and accident case analysis. Among them, the main steps in the fault analysis are to draw the fault point sequence network diagram, and calculate the three-phase short circuit and failure at the high voltage side, medium voltage side, low voltage side of the transformer, and 220kV, 110kV, 35kV lines, etc. according to the fault point sequence network diagram. Symmetrical short-circuit current calculation, etc. In the setting calculation, the focus includes 220kV bus, 220kV bus tie and 220kV outlet setting, referring to the manual of various equipment. Finally, the reference literature and related materials have carried out special research and case analysis on the prevention of relay protection accidents. It can effectively cultivate the awareness of engineering services to the society, understand the importance of power system relay protection, and be familiar with the work process of power system relay protection.

Keywords: Substation, Relay Protection, Fault Analysis, Setting Calculation, Accident Prevention

目录

摘 要 I

Abstract II

第一章 绪论 1

1.1 研究背景与研究意义 1

1.2 国内外研究综述 1

1.3 主要研究内容与研究流程 2

1.4 章节安排 2

第二章 故障分析 4

2.1 220kV变电站一次系统 4

2.1.1 向阳变一次接线简介 4

2.1.2 220kV向阳变主要一次设备简介 5

2.1.3 向阳变运行方式的说明 7

2.1.4 故障分析具体任务 9

2.2 阻抗计算与网络化简 10

2.2.1 阻抗参数计算 10

2.2.2 网络化简 12

2.3 短路计算 15

第三章 整定计算 18

3.1 整定对象与任务 18

3.2 整定思路 18

3.2.1 线路2K07相间距离保护整定 18

3.2.2 线路2K07接地距离保护整定 21

3.2.3 线路2K07零序电流保护整定 23

3.2.4 线路2K07的其他参数整定 25

3.3 220kV母线保护整定 25

3.3.1 母线差动保护 25

3.3.2 断路器失灵保护 26

3.3.3 母联失灵保护 26

3.3.4 母联充电保护 26

3.3.5 母联过流保护 26

3.3.6 TA断线 26

3.4 整定结果和说明 26

第四章 二次回路简要设计 29

4.1 概述 29

4.2 电流电压回路 29

4.2.1 母线电流电压回路 29

剩余内容已隐藏，请支付后下载全文，论文总字数：31022字