新型多输入端口升降压DC-AC变换系统  

Novel Multi-input-port Buck-Boost DC-AC Conversion System

作　　者：赖国清 赖群[1] 李铭 冯超坤 LAI Guoqing;LAI Qun;LI Ming;FENG Chaokun(Yunfu Power Supply Bureau of Guangdong Power Grid,Yunfu 527300,Guangdong,China;School of Electrical Engineering,Southeast Univeristy,Nanjing 210096,Jiangsu,China)

机构地区：[1]广东电网公司云浮供电局,广东云浮527300 [2]东南大学电气工程学院,江苏南京210096

出　　处：《电气传动》2023年第10期23-28,共6页Electric Drive

基　　金：南方电网公司重点科技项目(GDKJXM20198298)。

摘　　要：在可再生能源发电应用中,多输入端口功率变换系统是一种性价比较高的电能转换方案。提出一种基于单级非隔离升降压功率变换单元的多输入端口DC-AC变换系统。各种直流源经过各自输入端口搭配的全桥电路后进行串联,再通过基于Buck-Boost拓扑的主变换单元处理后产生正弦波交流输出。主输入端口对应的全桥电路高频工作,从输入端口对应的全桥电路工频工作。分析该新型变换系统的工作模态和稳态特性,并使用仿真软件PSIM对分析结果进行了验证。制作并测试了一台峰值效率为96.1%、功率为500 W的硬件样机。实验结果表明,该多输入端口DC-AC变换系统具有效率较高、增益范围宽和结构较为简单的特点。In the application of renewable energy power generation,multi-input-port power conversion system is a high cost-effectiveness option.A multi-input-port DC-AC conversion system based on single-stage nonisolated buck-boost power conversion cell was propsed.Each type of DC source flows into the full-bridge circuit of corresponding input port and cascoded together,then,the total input voltage was processed by main conversion cell based on Buck-Boost topology and sinusoidal AC output was generated.Full-bridge circuit of master input port works in high frequency and full-bridge circuit of slave input port works in low frequency.Operation modes and steady-state characteristics of the proposed novel conversion system were analyzed.Furthermore,PSIM simulation software was employed to verify the analysis results.A 500 W hardware prototype with 96.1%peak efficiency was fabricated and tested.The experimental results demonstrate that the proposed multi-input-port DCAC conversion system features of relatively high efficiency,wide gain range and simple system structure.

关 键 词：多输入端口 升降压 逆变器 单级系统 非隔离 

分 类 号：TM46[电气工程—电器]