一种光伏发电DC-DC变换器

Research and Development of a Photovoltaic DC - DC Converter

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.

The electrical energy from solar photovoltaic array is influenced by solar light intensity and en-vironmental factor and has strong randomness, instability and gap characteristics. A DC - DC converter hav-ing 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.