摘要:风能作为一种清洁的可再生能源，越来越受到各国的重视。首先，它来自于自然，取之不尽用之不竭；其次，风力发电只降低了风的速度，并不产生任何有害的物质，对大自然没有污染，这些优势使得人们对它青睐有加。

　　　随着电压源型换流器（VSC）及脉宽调制技术（PWM）的发展，二十世纪九十年代产生了采用PWM控制的VSC进行直流输电，柔性直流输电技术具有控制灵活方便、提高系统稳定性、增加系统动态无功储备和改善电能质量等技术优势，适用于可再生能源并网、非同步交流电网互联和城市电网供电等方面。故柔性直流输电在很多国家风力发电中也相继被应用。

　　　本文共分为八章，第一章介绍了风电场的基本资料；第二章根据已知风电场环境确定了风机的布置，对风机进行选型；第三章对风电接入系统方案进行设计，并确定了风力发电一级升压和二级升压的变压器台数、容量和型号；第四章进行短路电流计算，并对一些电气设备进行选型；由于风机的结构特点，对风机进行防雷设计很重要，第五章进行风力发电机的防雷方案，并对相应的浪涌保护器和防雷器进行选型；第六章重点讲述了柔性直流输电方案，柔性直流输电的特点及VSC-HVDC的结构、控制原理和控制方法；第七章做了整个设计的小结，最终完成整个设计。

关键词：风能发电；接入系统；短路计算；柔性直流输电

Abstract:Wind energy as a clean and renewable energy sources, more and more attention all over the world. First of all, it comes from the natural be inexhaustible, inexhaustible; secondly, wind power is only reduced wind speed, does not produce any harmful substances, no pollution to nature, these advantages make it favors.

　　As the voltage source converter ( VSC ) and pulse width modulation ( PWM ) development, nineteen ninties produced by PWM control of VSC DC transmission, flexible HVDC technology has the advantages of flexible control and convenient,improve the stability of the system, increasing the system dynamic reactive reserve and improve the quality of electric energy and other technical advantages, application in the renewable energy grid, non synchronous AC network interconnection and city power supply etc.. The flexible HVDC in many countries have also been used in wind power generation.

　　This paper is divided into eight chapters, the first chapter introduces the basic information of wind farm; the second chapter according to the known wind environment defining a fan arrangement, on fan selection; the third chapter of the wind power access system scheme design, and to determine the wind power level boost and two liter pressure transformer number, capacity and models; the fourth chapter carries on the short-circuit current computation, and some electrical equipment selection; due to the fan structure characteristics, the wind turbine lightning protection design is very important, chapter fifth wind turbine lightning protection design, and the corresponding surge protectors and lightning protection device selection; the sixth chapter focuses on the flexible DC power transmission project, flexible DC power transmission characteristics and the structure of VSC-HVDC, the control principle and the control method. The eighth chapter summarizes, finally complete the entire design.

Keywords: wind power generation; access system; short circuit calculation; HVDC flexible