PR控制的多模块多电平电力电子变压器  

PR-controlled Multi-modular Multi-level Power Electronics Transformer

作　　者：叶逢春 薛飞 徐恒山 石季英[3] 乔文[3] YE Fengchun;XUE Fei;XU Hengshan;SHI Jiying;QIAO Wen(Electric Power Research Institute,State Grid Ningxia Electric Power Co.,Ltd,Yinchuan 750002,China;College of Water Resources and Architectural Engineering,Northwest Agriculture and Forestry University,Xianyang 712100,China;Key Laboratory of Smart Grid of Ministry of Education,Tianjin University,Tianjin 300072,China)

机构地区：[1]国网宁夏电力有限公司电力科学研究院,银川750002 [2]西北农林科技大学水利与建筑工程学院,咸阳712100 [3]天津大学智能电网教育部重点实验室,天津300072

出　　处：《电力系统及其自动化学报》2020年第5期113-119,共7页Proceedings of the CSU-EPSA

摘　　要：针对动车牵引系统中传统工频牵引变压器具有体积大、重量大的缺点,提出一种具有中频变压器MFT(medium-frequency transformer)结构的电力电子牵引变压器PETT(power electronics traction transformer)。PETT的高频整流器采用半桥电路,调制模块中引入载波移相技术;电流内环采用比例谐振PR(proportional resonant)控制。将模块化技术、载波移相技术与比例谐振控制技术相结合,在较小的电感体积下提高了网侧电流波形,减轻了牵引系统的重量和体积。基于MATLAB/Simulink平台搭建了PETT的仿真模型,并开发了1台3 kW的PETT样机。仿真与实验结果证明:在大扰动情况下,PETT能迅速地对负载的波动进行调节并使其稳定,具有良好的静态、动态特性和较高的工作效率。Aimed at the disadvantages of a traditional grid-frequency traction transformer such as large volume and heavy weight,a kind of power electronics traction transformer(PETT)is proposed,which has the structure of a medium-frequency transformer(MFT). The high-frequency rectifier in the PETT adopts a half-bridge circuit,the carrier phase-shifting technology is introduced into the modulation module,and proportional resonant(PR)control is adopted in the inner current loop. The modular technology,carrier phase-shifting,and PR control are combined. With a smaller filtering inductor,the waveform of grid current is improved,and the weight and volume of the traction system are reduced. A simulation model of PETT was established based on the MATLAB/Simulink platform,and a 3 kW PETT prototype was developed. Simulation and experimental results verify that in the case of large disturbances,the proposed PETT can quickly regulate load fluctuations and further stabilize the load,and it has satisfying static and dynamic performances as well as a higher operation efficiency.

关 键 词：电力电子牵引变压器 比例谐振 载波移相 中频变压器 模块化技术 

分 类 号：TM722[电气工程—电力系统及自动化]