风光互补控制电路逆变电路过压保护毕业设计论文.doc

摘 要 风光互补发电是利用风能和太阳能的资源互补特性，将间歇性的风能和太阳能通过有效的转化、储存、控制等手段，形成稳定的电力输出。发电系统、控制系统、储能系统独立设计，是整合后系统稳定性差的根本原因，也是目前该行业的技术壁垒。 本文采用推挽式DC/DC变换电路，将12V左右的直流转换为后级逆变所需的14V直流，再经过整流滤波电路得到一组直流电。采用SG3525芯片作为DC/DC电路的主控元件，进行开关管的PWM控制，结构简单转换效率高；后级采用推挽式DC/AC逆变电路，选用ICL8038型作为开关器件，器件功耗低、转换效率高等特点。为了实现输出电流的并网输电，其输出电流必须满足与电网电流同频、同相的特点。为了提高并网逆变器的稳定性和安全性，本文设计了过压保护、过流保护、过热保护、直流反接保护等一系列保护功能。 关键词：风光互补;控制电路;逆变电路;过压保护 Abstract Wind power is the use of wind and solar energy resources complementary properties, the intermittent wind and solar power through efficient conversion, storage, control and other means, the formation of stable power output. Power systems, control systems, energy storage systems independent design, the system is the integration of the root causes of poor stability, is currently the industrys technical barriers. In this paper, push-pull DC / DC converter circuit, about 12V dc conversion needed for the post-stage inverter 14V DC, through the rectifier filter circuit to get a group of DC. Using SG3525 chip as the DC / DC circuit of the master element for PWM control of the switch, simple structure, high conversion efficiency; later stage push-pull DC / AC inverter circuit ICL8038 type used as a switching device, the device is low power consumption conversion efficiency. In order to achieve the output current and network transmission, the output current must be met with the same frequency grid current, phase characteristics. In order to improve the grid inverter stability and security, the paper design overvoltage protection, over current protection, thermal protection, DC reverse polarity protection and a series of protective functions. Keywords: wind and solar; control circuit; inverter circuit; overvoltage protection 目录 摘 要 1 目录 3 第一章 绪论 1 1.1 研究背景与研究意义 1 1.2 太阳能和风能发电的研究现状 2 1.2.1 国内外风力发电的研究现状 2 1.2.2 国内外太阳能发电的研究现状 2 1.3风光互补发电系统的应用 3 第二章 风光互补发电系统的构成和工作原理 4 2.1 风光互补发电系统的工作原理 4 2.2太阳能光伏发电系统 4 2.2.1太阳能光伏发电的工作原理 4 2.2.2 太阳能阵列的等效电路 5 2.2.3 太阳能阵列的输出参数 6 2.3 风力发电部分 7 2.3.1 风力发电机的组成及类型 7 2