±800kv换流站设计

毕业设计（论文）任务书

哈密—郑州±800kV

特高压直流输电换流站初步设计

摘要

特高压直流输电工程因具有送电距离远、送电容量大、控制灵活等特点，已将被广泛应用在西电东送、南北护工等重大工程项目中。哈密—郑州直流输电工程是世界上首个±800kV、输电容量800万kW级的直流输电工程。与其它工程相比，输送容量更大，送电距离更远，面临的环境条件更加复杂，安全质量和技术要求更高。本文致力于直流输电系统的基本配置要求，讨论了直流输电的稳态运行方式，介绍了换流站典型主设备的性能要求、设备参数选择，换流站的无功平衡等问题。分别从换流变压器、换流阀以及平波电抗器、交、直流滤波器、交、直流断路器和直流测量装置的设计等方面介绍了特高压直流输电系统换流站的设计。

关键字：换流站设计；特高压直流输电；换流变压器；换流阀；

Preliminary Design of

UHVDC Converter Station for

Hami-zhengzhou

ABSTRACT

UHVDC transmission projects in virtue of transmission distance, large transmission capacity, flexible control, etc, have been widely applied in China to send the important engineering projects, such as sustainability, Hami-Zhengzhou UHVDC project is the world's first ±800kV level, transmission capacity of 8 million kW DC power transmission pared with other engineering, its has bigger transport capacity, farther transmission distance , the more complex environmental condition, higher safety and quality technical requirements.This paper committed to the basic configuration of DC transmission system requirements, discusses the steady state operation mode of the DC transmission, introduces the converter station typical performance requirements and equipment parameter selection of main equipment, on the reactive power balance and so on.Introducing the design of UHVDC converter station from the converter transformer,converter valve,Smoothing reactors,AC/DC Filter(ACF/DCF),AC/DC circuit breaker and the design of DC measurement devices.

KEYWORDS:Converter station design;UHVDC；Converter transformer;Converter valve;

目录

引言................................................................................................................... - 1 - 第1章直流输电工程..................................................................................... - 2 -

1.1 直流输电工程概述............................................................................. - 2 -

1.2.1 直流输电的优点 ..................................................................... - 3 -

1.2.2 直流输电的缺点 ..................................................................... - 3 -

1.3 直流输电的应用................................................................................. - 4 -

1.4 哈密南—郑州直流输电工程简介..................................................... - 4 -

1.5 换流站主要设备................................................................................. - 5 - 第2章直流输电换流站基本计算................................................................. - 7 -

2.1 直流输电工程额定值......................................................................... - 7 -

2.1.1 额定直流功率 ......................................................................... - 7 -

2.1.2 额定直流电压 ......................................................................... - 7 -

2.1.3 额定直流电流 ......................................................................... - 7 -

2.2 直流输电稳态工况计算..................................................................... - 7 -

3.1 换流变压器....................................................................................... - 12 -

3.1.1 换流变压器功能与特点....................................................... - 12 -

3.1.2 换流变的型式 ....................................................................... - 13 -

3.1.3 换流变的结构 ....................................................................... - 14 -

3.1.3 脉动换流器主要参数计算................................................... - 14 -

3.1.4 换流变压器主要参数计算................................................... - 15 -

3.2 换流阀 ............................................................................................... - 18 -