| 引用本文: | 章勇高,熊健,王帅,何鹏.一种基于混合Buck/Boost电路的两级式逆变器功率解耦方法研究[J].电力系统保护与控制,2018,46(13):71-77.[点击复制] |
| ZHANG Yonggao,XIONG Jian,WANG Shuai,HE Peng.Research on a decoupling method of a two-stage inverter with hybrid Buck/Boost circuit[J].Power System Protection and Control,2018,46(13):71-77[点击复制] |
|
| 摘要: |
| 针对传统两级式逆变器由于输入输出功率不平衡所带来的二次功率扰动问题，提出了一种六开关的混合Buck/Boost电路，并联在逆变器交流输出侧进行功率解耦，从而抑制母线电压和直流侧电流中的二次纹波，并将大电解电容替换成小容量和长寿命的薄膜电容。混合Buck/Boost电路可以处理双向变化的脉动能量，通过脉冲能量调制法(Pulse Energy Modulation, PEM)计算每个开关周期的开关占空比，实现对脉动功率的解耦控制。分析了混合Buck/Boost电路的四种工作模式，推导了PEM控制原理。使用Matlab/Simulink平台搭建仿真模型进行验证，结果证明了方法的合理性和有效性。 |
| 关键词: 二次功率扰动 功率解耦 混合Buck/Boost PEM |
| DOI：10.7667/PSPC170950 |
| 投稿时间：2017-06-24修订日期：2017-08-17 |
| 基金项目:国家自然科学基金项目资助(51467006);江西省科技厅专项资助(20151BBE50118，20161BBH80032) |
|
| Research on a decoupling method of a two-stage inverter with hybrid Buck/Boost circuit |
| ZHANG Yonggao,XIONG Jian,WANG Shuai,HE Peng |
| (School of Electrical and Automation Engineering, East China Jiaotong University, Nanchang 330013, China) |
| Abstract: |
| To solve the problem of secondary power disturbance caused by power unbalance between input terminal and output terminal in a traditional two-stage inverter, a six-switch hybrid Buck/Boost circuit in parallel with AC side is proposed to handle power decoupling. Thus, second harmonic voltage appeared in DC bus and second harmonic current appeared in voltage source are suppressed, and large electrolytic capacitor can be substituted by a small, long lifespan film capacitor. The hybrid Buck/Boost circuit can handle bi-directional changed pulsation power through Pulse Energy Modulation (PEM), which calculates duty ratio in each switching cycle and achieves decoupling control. Furthermore, four operating modes of the hybrid Buck/Boost circuit are analyzed and the principle of PEM is deduced. Finally, theoretical analysis is verified by Matlab/Simulink simulation platform. Results indicate that the proposed scheme is reasonable and effective. This work is supported by National Natural Science Foundation of China (No. 51467006). |
| Key words: secondary power disturbance power decoupling hybrid Buck/Boost pulse energy modulation (PEM) |
