一种光伏发电DC-DC变换器
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一种光伏发电DC-DC变换器
李丹，俞万能，郑为民
(集美大学轮机工程学院，福建厦门 361021)
［摘要］在光伏发电系统中为了控制蓄电池的充放电的稳定性，保护系统的安全性，设计了一种以非隔离型的Buck/Boost拓扑结构为主电路的DC-DC变换器、设计了电路的参数，提出了基于电压、电流双闭环的控制算法，采用微处理器TMS320F28335为控制核心，开发了控制系统.实验结果表明：该DC-DC变换器具有输入电压范围广、输出电压精度高以及良好的动态、稳态特性.
[关键词]光伏阵列；DC-DC变换器；TMS320F28335；电压电流双闭环控制
Research and Development of a Photovoltaic DC-DC Converter
LI Dan，YU Wan-neng，ZHENG Wei-ming
(Marine Engineering Institute，Jimei University，Xiamen 36102，China) Abstract：The electrical energy from solar photovoltaic array is influenced by solar light intensity and environmental factor and has strong randomness,instability and gap characteristics.A DC-DC converter having wide input voltage,output voltage and high precision was designed in this paper.A non-isolated Buck/Boost topology was used as the main circuit of DC-DC converter,the parameters of the circuit were given and a control algorithm was proposed based on voltage,current double closed loop.The system took the high-speed high-performance micro processor
TMS320F28335 as the control core to develop its control system.The experimental results showed that the DC-DC converter had a wide input voltage range, a high output voltage precision and the good dynamic and steady-state characteristics. Key words：Photovoltaic array；DC-DC converter；TMS320F28335；voltage and current double closed loop control