[1]孙谦浩,李亚楼,孟经伟,等. 基于电流馈电型开关电容的多重模块化直流变压器及其优化调制策略[J].控制与信息技术,2019,(06):1.[doi:10.13889/j.issn.2096-5427.2019.06.500]
 SUN Qianhao,LI Yalou,MENG Jingwei,et al. Research on Current-fed Switched-capacitor-based Multiple Modular DC Transformer and Optimized Modulation Strategy[J].High Power Converter Technology,2019,(06):1.[doi:10.13889/j.issn.2096-5427.2019.06.500]
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 基于电流馈电型开关电容的多重模块化直流变压器及其优化调制策略()
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《控制与信息技术》[ISSN:2095-3631/CN:43-1486/U]

卷:
期数:
2019年06期
页码:
1
栏目:
出版日期:
2019-12-05

文章信息/Info

Title:
 Research on Current-fed Switched-capacitor-based Multiple Modular DC Transformer and Optimized Modulation Strategy
作者:
 孙谦浩1李亚楼2孟经伟1赵 彪1穆 清2张 星2
 (1. 清华大学 电机工程与应用电子技术系,北京 100084;2. 中国电力科学研究院,北京 100192)
Author(s):
 SUN Qianhao1 LI Yalou2 MENG Jingwei1 ZHAO Biao1 MU Qing2 ZHANG Xing2
 ( 1. Department of Electrical Engineering, Tsinghua University, Beijing 100084, China;
2. China Electric Power Research Institute, Beijing 100192, China )
关键词:
 中压直流配电网直流变压器电流馈电型开关电容双重高频链电压幅值匹配调制高频链电流应力
Keywords:
 MVDC distribution power network DC transformer current-fed switched capacitor dual HFL voltage amplitudes matching modulation strategy optimization of HFL current stress
分类号:
U231.6;TP319
DOI:
10.13889/j.issn.2096-5427.2019.06.500
文献标志码:
A
摘要:
 针对中压直流电网中不同中压直流母线的连接问题,文章提出了一种基于电流馈电型开关电容的输
入串联输出串联多重模块化直流变压器(current-fed switched capacitor-based input-series-output-series multiple modular DC transformer, CFSC-DCT) 拓扑结构。相比于传统的基于双主动全桥的多重模块化直流变压器,CFSC-DCT 在拓扑上具有关键的在线冗余设计与直流故障隔离功能,从而提高了中压直流电网的运行可靠性;同时,为了优化其高频链环节的电流应力,一种双重高频链电压幅值匹配调制策略被应用于所提出的CFSC-DCT。仿真结果表明,在该调制策略下,CFSC-DCT 的高频链电压始终处于匹配状态,避免了传统方波调制下的直流端电压不匹配现象,优化了其高频链电流应力,提高了直流变压器自身及中压直流电网的平均运行效率与经济效益。
Abstract:
 To solve the connecting issue of different medium-voltage DC (MVDC) buses in MVDC power grids, a current-fed switched capacitor-based input-series-output-series multiple modular DC transformer (CFSC-DCT) was designed in this paper. Compared with the traditional dual-active- bridge –based DCT, CFSC-DCT has the key online redundant SMs design and DC fault isolation capability from the view of topology, improving the reliability of MVDC power grid. Meanwhile, to optimize the current stress in high frequency link (HFL) of CFSCDCT, a dual HFL voltage amplitudes matching modulation strategy (DAM) is employed for the proposed CFSC-DCT. Based on DAM, the HFL voltages of CFSC-DCT is always under the matching state and the HFL current stress can be optimized, solving the issue of DC terminal voltages mismatch caused by the traditional square-wave modulation, and improving the efficiency and economic benefit of DCT and MVDC power grid.

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备注/Memo

备注/Memo:
 收稿日期:2019-08-06
作者简介:孙谦浩(1993—),男,博士研究生,主要研究方向为柔性直流输配电及其关键换流设备技术。
基金项目:国家自然科学基金项目(51877116)
更新日期/Last Update: 2019-12-03