四开关升降压变换器调制方法研究  

Research on Modulation Method of Four Switch Voltage Buck-boost Converter

作　　者：于齐 张晓光 马海超 贺博宇 张中强 马桂伟 Yu Qi;Zhang Xiaoguang;Ma Haichao;He Boyu;Zhang Zhongqiang;Ma Guiwei(Zhangjiakou Power Supply Company,State Grid Jibei Electric Power Co.,Ltd.,Zhangjiakou 075000,China;Guangdong Ocean University,Yangjiang 529500,China)

机构地区：[1]国网冀北电力有限公司张家口供电公司,河北张家口075000 [2]广东海洋大学,广东阳江529500

出　　处：《煤矿机械》2025年第2期42-45,共4页Coal Mine Machinery

基　　金：广东海洋大学科研项目(YJR23009)。

摘　　要：四开关升降压变换器以其结构简单、输入输出极性相同及适应宽电压范围的特点,在分布式能源系统中得到了广泛应用。由于变换器两端电压的不确定性,工作过程中会在不同模式间进行切换。为实现不同工况下工作模式的平滑切换,提出一种占空比缩减调制方法。该方法通过检测电感两端电压差,在2个端口电压相等或接近时缩减低压侧占空比,进而增大高压侧占空比的调节范围,实现四开关变换器的控制目标。实验结果表明,该方法有效解决了模式间平滑切换的问题,保证了输出电压的稳定,实现了能量调度。The four switch voltage buck-boost converter has been widely used in distributed energy systems due to its simple structure,identical input and output polarities,and adaptability to a wide voltage range.Due to the uncertainty of the voltage across the converter,it will switch between different modes during operation.To achieve smooth switching between different operating modes under different conditions,a duty cycle reduction modulation method was proposed.This method achieves the control objective of the four switch converter by detecting the voltage difference across the inductor,reducing the duty cycle on the low-voltage side when the voltages at both ports are equal or close to each other,and thereby increasing the adjustment range of the duty cycle on the high-voltage side.The experimental results show that this method effectively solves the problem of smooth switching between different modes,ensures the stability of the output voltage,and achieves energy scheduling.

关 键 词：四开关变换器 调制方法 占空比缩减调制 检测技术 

分 类 号：TM46[电气工程—电器]