准Z源Buck开关变换器输出短路火花放电模型研究  

Research on the output short circuit spark discharge mathematical model of quasi-Z-source buck converter

作　　者：程红[1] 李鹤群[1] 王聪[1] 

机构地区：[1]中国矿业大学(北京)机电与信息工程学院,北京100083

出　　处：《煤炭学报》2012年第A02期505-510,共6页Journal of China Coal Society

基　　金：国家自然科学基金资助项目(51077125);中央高校基本科研业务费专项资金资助项目(2009KJ02;2010YJ03)

摘　　要：讨论了一种输出端带准Z源网络的Buck变换器拓扑,对该拓扑及常规Buck变换器拓扑输出短路故障时的火花放电电压、放电电流及放电能量进行了理论分析,建立了相应的变换器输出短路火花放电能量的近似计算数学模型,证明了准Z源Buck变换器抑制短路火花放电能量的有效性。在此基础上,搭建了基于Matlab的准Z源Buck变换器和常规Buck变换器输出短路故障仿真模型。通过实例对两种变换器拓扑短路火花放电过程进行了仿真和实验对比分析,仿真和实验的结果进一步对上述理论及计算模型的正确性进行了验证。A novel typology of Buck converter with Quasi-Z-Source（QSZ） Filter in the output was discussed.The discharge voltage,current and spark energy in the output of the proposed Buck new topology and traditional Buck topology during the period of short circuit in the output were analyzed theoretically in detail,the corresponding computation mathematical model was built also.It was verified that the spark energy in the short point,when the short circuit in the output is happen,could be decreased greatly.Based on the analysis above,the Matlab-based simulation models of both converters are built.In the final,through simulaion and experiment,examples of the short spark discharge process in the traditional Buck converter and QSZ Buck converter during the interval of discharging are compared with each other.The experimental and simulation results are given to demonstrate the correctness of the above analysis and the biult mathematical models.

关 键 词：本质安全 准Z源 BUCK变换器 短路火花能量 数学建模 

分 类 号：TD611.5[矿业工程—矿山机电]