1、摘要 I 模拟太阳能电源并网电路与控制部分硬件设计模拟太阳能电源并网电路与控制部分硬件设计 摘摘 要要 太阳能作为一种高效无污染的新能源,一种未来世纪常规能源的替代 品。 目前, 太阳能并网发电是太阳能光伏的重要应用之一, 其系统包括光伏电池、 变换器、蓄电池、控制器四大部分。该设计从实验的角度,对光伏并网发电系统 进行模拟,主要由DCAC变换电路、控制电路、驱动保护电路、采样电路、工 频变换电路等五部分组成。基本思路是在单片机C8051F020控制作用下采用正弦 波脉宽调制技术(SPWM)对系统进行控制,主电路采用MOSFET为主要元器件 的单相桥式逆变电路,经滤波电路滤波后变压进行输出。基
2、于此,本设计采用单 片机本身的PCA模块,定时器模块,完成相应的控制功能,使光伏发电频率紧跟 模拟电网频率,同时实现光伏最大功率跟踪,系统具有欠压保护、过流保护以及 频率和相位跟踪等功能,并在欠压、过流故障排除或能自动恢复正常状态。该系 统性能相对稳定,能够满足本次设计的需要。 关键词:关键词:光伏并网 DCAC逆变电路 SPWM 最大功率点跟踪 Abstract II The Hardware Design Of Solar Power Combined To The Grid And Controled Abstract Solar energy as the one kind of ef
3、ficient pollution-free new energy, a future century of conventional energy sources substitutes. At present, the solar energy grid generation is one of the important application of solar photovoltaic battery, the system includes, converter, batteries, controller four most. This design, from the point
4、 of view of experiment of photovoltaic (pv) grid power system is simulated by DC-AC conversion - main circuit, controlling circuit, drive protection circuit, sampling circuit, industrial frequency transform circuit composed to five parts. The basic idea is C8051F020 SCM control action in the sine pulse-width modulation technology (SPWM) the system is controlled, main circuit adopts MOSFET as the main components of single-phase bridge type inverter circuits, the filter circuit for output variab