面向低压大容量直流供电的混合型AC/DC接口变流器解耦控制  

Decoupling Control of Hybrid AC/DC Interface Converter for Low-voltage Large-capacity DC Power Supply

作　　者：王坤放 何晋伟 董增波 杨士慧 杨鹏 李倩 WANG Kunfang;HE Jinwei;DONG Zengbo;YANG Shihui;YANG Peng;LI Qian(School of Electrical and Information Engineering,Tianjin University,Tianjin 300072,China;State Grid Hebei Electric Power Company,Shijiazhuang 050000,China;State Key Laboratory of Advanced Power Transmission Technology,Global Energy Interconnection Research Institute Co.,Ltd.,Beijing 102200,China)

机构地区：[1]天津大学电气自动化与信息工程学院,天津300072 [2]国网河北省电力有限公司,石家庄050000 [3]先进输电技术国家重点实验室,国网智能电网研究院有限公司,北京102200

出　　处：《高电压技术》2023年第12期5133-5141,共9页High Voltage Engineering

基　　金：国家电网公司科技项目(基于柔性变电站的数据中心高效供电技术及装备研究)(5200-201958451A-0-0-00)。

摘　　要：为解决传统基于电流源型整流器(currentsourcerectifier,CSR)的两级式高降压比电力电子变换设备中存在的多控制目标之间的耦合问题,在所提出的相控电流源型整流器和输入串联输出并联LLC-DC/DC变换器相结合的混合型拓扑结构基础上,通过建立考虑系统直流环节电感电容的小信号模型,提出了一种在较低自由度下可同时实现交流侧功率因数和输出直流电压调节的解耦控制方法。通过绘制系统的根轨迹,分析了系统解耦前后控制参数对系统稳定性的影响。最后,通过RT-Lab半实物仿真验证了所提方法的有效性。In order to solve the problem of coupling between multiple control targets in the traditional two-stage high-buck-ratio electric-electronic converter based on current source rectifier current source rectifier(CSR),this research is based on the hybrid topology of phase-controlled current source rectifier and input series output parallel LLC-DC/DC converter proposed in this paper.By establishing the small signal model considering the inductance and capacitance of the dc link of the system,we put forward a decoupling control method with low degree of freedom for ac side power factor and output dc voltage regulation.The influence of control parameters on system stability before and after decoupling is analyzed by drawing the root locus of the system.Finally,the effectiveness of the proposed method is verified by RT-Lab hardware-in-the-loop simulation.

关 键 词：交直流微电网 电流源型变流器 AC/DC变流器 低压直流供电 解耦控制 

分 类 号：TM46[电气工程—电器]