太阳能充电控制器设计--毕业设计.docx

太阳能充电控制器及逆变器设计 太阳能充电控制器及逆变器设计 摘要 太阳能光伏发电现已成为新能源和可再生能源的重要组成部分， 也被认为是当前世界最有发展前景的新能源技术。目前太阳能光伏发 电装置已广泛应用于通讯，交通，电力等各个方面，其核心部分就是 充电控制器。 在总体方案的指导下，本设计使用低功耗、高性能，超强抗干扰 的 STC89C52 单片机作为核心器件对整个电路进行控制。系统硬件电 路由太阳能电池充放电电路，电压采集和显示电路，单片机控制电路 和RS232 串口通信电路组成，主要实现对蓄电池电压的采集和显示。 软件部分依据PWM(Pulse Width Modulation) 脉宽调制控制策略，编 制程序使单片机输出 PWM 控制信号，通过控制光电耦合器通断进而控 制MOSFET 管开启和关闭，达到控制蓄电池充放电的目的，同时按照 功能要求实现了对蓄电池过充、过放保护和短路保护。实验表明，该 控制器性能优良，可靠性高，可以时刻监视太阳能电池板和蓄电池状 态，实现控制蓄电池最优充放电，达到延长蓄电池的使用寿命。 关键词： 充电控制器 太阳能光伏发电 PWM 脉宽调制 - - - 太阳能充电控制器及逆变器设计 Abstract Solar photovoltaic power generation has become an important part of new energy and renewable energy, it is considered the current worlds most promising new energy technologies. At present solar photovoltaic device has been widely used in communications, transport, electricity and other aspects, the core part is the charge controller. Under the guidance of the overall program, the design uses low-power, high performance, super anti-jamming STC89C52 microcontroller as a core device to control the entire circuit. Hardware circuit consists of a solar battery charging and discharging circuit, voltage acquisition and display circuit, the MCU control circuit and RS232 serial communication circuit, the main achievement of the acquisition and display battery voltage. Software is based in part on PWM (Pulse Width Modulation) pulse width modulation control strategy, programming the microcontroller output PWM control signal, by controlling the photocoupler on-off the control MOSFET opening and closing, to control battery charging and discharging purposes, and in accordance with the functional requirements implemented the battery over charge, over discharge protection and short circuit protection. Experiments show that the controller performance, high reliability, can always monitor the state of solar panels and batteries to achieve optimal control of battery charge and discharge, to prolong battery life. Keywords: