【作者】 刘艳芹；

【导师】 席自强；

【作者基本信息】 湖北工业大学 ， 电力电子与电力传动， 2009， 硕士

【摘要】 风光互补发电系统作为新能源技术应用的重要组成部分越来越受到人们的青睐,所以将此作为新能源研究的切入点,进行一些有益的尝试和探索。本文从太阳能电池的光生伏打效应入手,推导出太阳能电池的U—I曲线,并以此作为最大功率跟踪(MPPT)技术的理论基础。针对小风机的发电技术也存在的MPPT技术,文章进行了统一性研究,给出了新的控制策略——变步长扰动观察控制。为了提高系统的充放电效率,文章还对三段式充放电、均衡充电、温度补偿等蓄电池充电理论进行了阐述。根据上述理论,结合工程实际,设计了风光互补控制器的电路。利用电压霍尔和电流霍尔实现了风机电压、太阳能电池电压、蓄电池电压和充电电流的实时采样,利用TMS320F2812DSP的EVA与AD模块软件实现对蓄电池欠压、过压、运行等模式的智能充放电管理。针对风力发电机的输出电压波动大的问题,系统提供了硬件和软件的风机过速智能保护系统。本系统采用MPPT的控制策略提高了整个系统的效率,设计提供了一套LCD显示界面和一组LED指示灯增强系统管理的友好性。为了解决风光互补控制器芯片的供电问题,设计了一套以UC3843PWM芯片为核心的反激式辅助电源。该电源用硬件实现了电流内环、电压外环的双环控制策略,提高了系统供电的可靠性和稳定性。研制出了一台风光互补控制器样机,进行了有关实验、检测与调试。实验波形和数据都显示该系统运行稳定可靠,达到了设计要求。该方案可为风光互补控制器的工程设计提供一定的参考。更多还原

【Abstract】 As the important part of the new energy resources, the PV/wind hybrid energy conversion system with battery storage is arisen more and more attention. Now,we are studying about this advanced scientific knowledge about the control method of Hybrid PV/Wind power system. It is of great benefit.The paper begins with the photovohaic effect. According to the U-I performance characteristics of solar energy batteries, charge and discharge control strategy was proposed based on maximum power track technology (MPPT). In order to improve the efficiency of the charge and discharge system, this paper also proposed the principles of three—step charging, charging equalization, temperature compensation.Based on these theoretical research,combined an engineering project,a design of the Controller of Hybrid PV/Wind Power System was made. By the using of HL voltage sensors and HL current sensor, it achieved real-time sampling values, the wind-driven generator voltage, the solar panel voltage, the storage batteries voltage and the charging current. The TMS320F2812 DSP EVA and AD determine which state the batteries being in. The voltage of the storage batteries reach a certain minimum value, or are beyond the maximum voltage, or are within range of the normal. So it can accomplish charging the batteries are being charged or discharged intelligently, at appropriate time. The double intelligent protection systems, component of both the hardware and software, are provided so as to avoid overspeed and mechanical damage to the wind-driven generator. A friendly interface was provided through the display of the LED and LCD.The Hybrid PV/Wind power system needs a lot of different voltage levels. A DC source is required as interfaces between the DC systems of different voltage levels. In order to maintain the output at the desired value, it is specially designed a Pilot Flyback Switch Power Supply based on UC3843. The double control tactics of voltage control loop and current control loop, improved reliability and stability of the system.At last, according to those research, a controller of Hybrid PV/Wind power system was made, all kind of testing have been practiced on its capability, the results turned out that the whole capability and indexes have reached the design requests.更多还原