变速恒频风力发电控制系统的设计

电子机电论文编号:JD657  附任务书,论文字数:17306,页数:55

目 录

摘要  I
Abstract  II
第一章      绪 论 1
1.1   课题背景 1
1.2  风力发电的现状 1
1.3 本文主要研究内容 3
1.4 选题的意义 3
第二章 系统分析 5
2 .1   变速恒频风力发电系统的发展趋势 5
2.2变速恒频风力发电系统 6
2.2.1 无齿轮箱变速恒频双馈风力发电成套设备的优点： 7
2.2.2 结构与技术参数 8
2.2.3  运行和安全系统 10
2.3.3.1 运行数据  10                
2.3.3.2 发电量数据  10             
第三章   系统设计 12
3.1 发电量数据 12
3.1.1 控制系统 12
3.1.2运行控制 13
3.1.3远程控制 14
3.1.4 控制柜 14
3.1.5 控制界面命令，按钮说明 14
3.1.6状态窗口 14
3.1.7 信号指示灯说明 15
3.1.8 监控参数 15
3.1.9 DSP在控制系统中的应用 17
3.2  风力发电系统 18
3.2.1  风力发电系统的原理 18
3.2.2  风力发电系统的主电路 19
3.2.3   风力发电系统的控制策略 19
第四章  系统实施与完善 21
4.1操作说明 21
4.2 人机界面 24
4.3 窗口一览表 25
结 论 29
参考文献 30
致 谢 31
附 录  32

摘 要

    变速恒频控制系统是一套基于工业控制计算机和数字信号处理器（DSP）的风力发电机组DCS控制系统。主要任务是将发电机切入和切除电网，并管理来自不同传感器（风电机组内部传感器，电网电压电流变送器等）的全部信息。根据采集的数据，计算机程序将自动以最佳和最安全的方式执行所有的控制操作。计算机实时监控全部阀值参数。系统可以自动采集和存储运行数据。利用表格和图形方式调用存储区中的各种信息和历史纪录。采用全汉化人机界面，用户可以通过液晶显示器观察各种数据和系统状态，调节设定。功率开关板,保护控制装置设在地面塔内，测量部分放在塔上。还可通过电话线和调制解调器（或RS-485）在中央控制室中对风力发电系统进行远程监测通信。功耗低、操作简单方便，适用范围广。通过本题目的研究和制作,掌握变速恒频风力发电控制系统的自动控制系统的工作原理及自动控制系统电路的设计与开发,分析风力机运行特性及其最佳风能利用原理，以及双馈电机的运行特性和能量转换特性、它在可再生能源发电领域的良好应用前景，通过仿真验证了采用直流电机模拟的风力给予双馈发电机共同组成的变速恒频风力机系统运行在风力机最佳功率曲线上的可行性，证明了可以控制转子电流，实现系统的变速恒频运行，双馈发电机由风力机拖动其旋转发电。其三相定子绕组与电网相连；转子绕组为正交的两相绕组，并经由IGBT组成的交直交双向变频器与电网相连。同时对国内外风力发电的发展现状进行了概述，指出了风力发电的发展趋势和研究方向。

                          
关键词：变速恒频 ； 风力发电 ；控制系统

Variable-speed Constant-frequency Wind-power Generation System
Abstract

The variable-speed and constant-frequency controlling system is a wind-power generation unit DCS controlling system, which is based on industrial controlling computer and digital signal processor (DSP),Its primary mission is to make the generator join in or cut off from the different sensors.(internal sensor of wind electrical machinery, transmitter of electrical network’s voltage and current).According to the date gathered, the computer program will automatically execute all controlling operation in the best and safest way. And the computer can real time monitor all the threshold parameters. The system can automatically collect and memory the performance date through forms and graphs. to invoke each sort of information and historical records, and through the entire Chinese-characterized interface between machine and humans, to make the user observe variable date and the condition of the system at the liquid-crystal display, adjusting the settings. For the power keyboard, the device for protection is located in the ground tower and that for measurment is placed on the tower. The system can also remote control the wind-power generating system in central controlling hall, using telephone line and the modem (or RS485). And the system is widely used for its low consumption. And convenient operation. Through the research and manufacture of this subject, the principle and circuit of the automatic system, part of the variable-speed and constant-frequency, for best using the wind power are analyzed, the performance and energy converting characteristics are discussed, finally its fine application in the generation of renewable energy electric is forecast. Through the simulation, it is confirmed that, the wind power simulated by electrical machinery of direct current can afford the variable-speed and-constant-frequency wind power system, which is composed by double-fed electrical machinery the feasibility of performance at the best power trace. Then, the control of current is proved, realizing variable-speed and constant-frequency performance of the system. Its three-phase stator winding is connected to the electrical networks by the direct-alternating-direct bi-directional converter which is computer by IGBT. Meanwhile, the paper outlines the domestic and foreign developing of the wind-power generation and its present situation, pointing out the developing tendency and researching direction.

Keywords: changing speed constant frequency; wind power generator；controlling system