| 引用本文: | 孙谦浩,王裕,宋强,赵彪,李建国.应用于直流配电网的双向全桥直流变换器比较分析[J].电力自动化设备,2017,37(10): |
| SUN Qianhao,WANG Yu,SONG Qiang,ZHAO Biao,LI Jianguo.Analysis and comparison of dual-active-bridge DC / DC converters in DC distribution network[J].Electric Power Automation Equipment,2017,37(10): |
|
| 摘要: |
| 对电容缓冲式直流变换器采用死区时间移相控制。通过比较分析电容缓冲式直流变换器与非缓冲式直流变换器的开关特征，得出了缓冲电容对高频环节波形特征、功率传输特性以及回流功率特性的影响，并推导了可以统一描述这2种不同拓扑结构的传输功率表达式与功率因数表达式，进而得出两者之间的联系与区别。对缓冲电容的取值进行了理论分析，提出缓冲电容的选取方法。仿真与实验结果表明了理论分析的正确性与控制策略的有效性。 |
| 关键词: 直流配电网 双向直流变换器 du / dt 软开关 缓冲电容 回流功率 |
| DOI：10.16081/j.issn.1006-6047.2017.10.008 |
| 分类号:TM46 |
| 基金项目:国家高技术研究发展计划(863计划)资助项目(2015-AA050103)；中国博士后科学基金面上项目(2016M601027) |
|
| Analysis and comparison of dual-active-bridge DC / DC converters in DC distribution network |
|
SUN Qianhao1, WANG Yu1, SONG Qiang1, ZHAO Biao1, LI Jianguo2
|
|
1.State Key Laboratory of Control and Simulation of Power System and Generation Equipment, Department of Electrical Engineering, Tsinghua University, Beijing 100084, China;2.School of Electrical & Electronic Engineering, North China Electric Power University, Beijing 102206, China
|
| Abstract: |
| A phase-shift control with dead time is applied in capacitor-buffer dual-active-bridge DC / DC converter. By comparing the switching characteristic of DAB(Dual-Active-Bridge) DC/DC converter with and without buffer capacitor, the impacts of buffer capacitor on high frequency link waveform, power transmission, and circling power characteristic are obtained. Then, the transmission power and power factor expression for the two topologies are deduced, and the relation and difference between them are achieved. The value of buffer capacitor is analyzed theoretically, and the selection method of buffer capacitor is proposed. Results of simulation and prototype experiment verify the effectiveness of the proposed theory and control strategy. |
| Key words: DC distribution network dual-active-bridge DC / DC converter du / dt soft switching buffer capacitor circling power |
