摘要时下世界能源问题日益突出，风力发电作为清洁能源得到了长足的发展。然 而并网运行的风力发电机降低了电网的稳定性，因此我们需要在风电厂并网点安 装无功补偿装置，通过功率补偿控制维持电压稳定。STATCOM(静止同步补偿器)作 为一种先进的无功补偿装置，具有调节速度快，运行范围广，连续的无功输出等 优点，都远远优于常规无功调节手段。

本文针对静止同步补偿器在风电厂无功补偿中的应用进行研究。详细介绍了 风速模型，风力发电机的模型，着重说明广泛应用于风力风电的双馈异步发电机 实现变速恒频的机理；对 STATCOM 的无功补偿的工作原理进行了具体阐述，最终 在 MATLAB/Simulink 中将建立了 9MW 双馈异步风力发电机组与 25KV 电网并网模型， 同时引入 STATCOM 模块；通过模拟仿真风电厂风速变化及系统故障，验证了 STATCOM 对风电场无功补偿的作用。仿真结果表明：静止同步补偿器能帮助风电厂 在风速波动及发生各种故障后，可以快速恢复运行电压，提高其故障穿越能力， 保证电网安全稳定运行。68490

毕业论文关键词 风力风电 双馈电机 STATCOM 无功补偿

Title Application of STATCOM in reactive power compensation Of wind farm

Abstract

Nowdays the world's energy problems have become increasingly highlighted,wind power as a clean energy has obtained considerable development.However,operation of Grid connected wind turbines reduces the stability of the grid,we need to install reactive power compensation device to maintain voltage stability By the control of power compensation.

This paper studies the application of STATCOM in the reactive power compensation of wind power plants.It details the velocity model,wind turbine models,highlighs the mechanism of power doubly fed induction generator widely used in wind power to achieve Variable Speed Constant Frequency.Works of STATCOM in reactive power compensation are specifically addressed.Eventually a 9MW doubly fed induction wind turbine with 25KV power grid model will be established in MATLAB/Simulink,STATCOM module is introduced meanwhile.It Verifies the contribution of STATCOM in transient stability of wind farms by the simulation of changes in wind speed and system failures in wind power plant.Results shows that, STATCOM can help wind farms with voltage recovery after the grid fault quickly and efficiently, improve capability of fault ride-through,ensure continuous operation of wind turbines,security and stability of the grid.

Keywords wind power generation doubly-fed generator STATCOM reactive compensation

目次

1 绪论 1

1.1 背景与意义 1

1.2 风电厂无功补偿的研究现状 3

1.3 本论文主要工作 4

2 风力发电模型 6

2.1 风电场风速模型 6

2.2 风电机空气动力学模型 7

2.3