基于模块化双有源桥变流器的直流变电站设计方案

管敏渊; 沈建良; 楼平

doi:10.7500/AEPS20190623002

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基于模块化双有源桥变流器的直流变电站设计方案

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- 基于模块化双有源桥变流器的直流变电站设计方案
- Design Scheme of DC Substation Based on Modular Dual-active-bridge Converter
- 电力系统自动化-方正平台 2020年44卷第14期页码：172-178
- 作者机构：
  
  国网浙江省电力有限公司湖州供电公司，浙江省湖州市 313000
- 作者简介：
  
  管敏渊(1985—)，男，通信作者，博士，高级工程师，主要研究方向：模块化多电平换流器和柔性直流输电、电力设备检测试验和状态检修、新能源并网和储能。E-mail：hanren@zju.edu.cn
  沈建良(1971—)，男，高级工程师，主要研究方向：电气工程及其自动化
  楼平(1967—)，男，教授级高级工程师，主要研究方向：电气工程及其自动化
- 基金信息：
  
  已申请国家发明专利（申请号：201910107015.0）()
- DOI：10.7500/AEPS20190623002
  中图分类号：
- 收稿日期：2019-06-23，
  
  修回日期：2020-03-25，
  
  网络出版日期：2020-06-15，
  
  纸质出版日期：2020-07-25
- 稿件说明：
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管敏渊,沈建良,楼平.基于模块化双有源桥变流器的直流变电站设计方案[J].电力系统自动化,2020,44(14):172-178.

GUAN Minyuan,SHEN Jianliang,LOU Ping.Design Scheme of DC Substation Based on Modular Dual-active-bridge Converter[J].Automation of Electric Power Systems,2020,44(14):172-178.
管敏渊,沈建良,楼平.基于模块化双有源桥变流器的直流变电站设计方案[J].电力系统自动化,2020,44(14):172-178. DOI： 10.7500/AEPS20190623002.

GUAN Minyuan,SHEN Jianliang,LOU Ping.Design Scheme of DC Substation Based on Modular Dual-active-bridge Converter[J].Automation of Electric Power Systems,2020,44(14):172-178. DOI： 10.7500/AEPS20190623002.

摘要

文中提出了一种基于模块化双有源桥变流器的直流变电站方案，将双有源桥模块按照输入端并联、输出端串联的结构级联而成，可以将输入端的直流低压升压至输出端的直流中高压，并且具备功率双向流动能力。模块化双有源桥变流器的直流高压出线连接到高压直流电网，各个模块的直流低压出线可分别连接到低压分布式电源和负荷。双有源桥模块内部使用结构紧凑的高频变压器实现输入端和输出端的电气隔离。提出了适用于模块化双有源桥变流器的串并联均衡控制，具有高效可靠且无需通信的特点，各模块的串联输出端的电压和并联输入端的电压保持相同的斜率关系。电磁暂态仿真结果表明该直流变电站总有功功率在各模块之间均匀分配，各模块的输入直流电流和输出直流电压能够保持均衡。

Abstract

This paper presents a DC substation design scheme based on the modular dual-active-bridge (DAB) converter. The DAB modules are cascaded in input-parallel output-series (IPOS) structure with bidirectional power-flow capability

in which the low DC voltage at the input terminal can be raised to the medium or high DC voltage at the output terminal. The output terminal with high DC voltage of modular DAB converter is connected to the high-voltage DC grid

while the input terminal of each module with low DC voltage is connected to low-voltage distributed generators and loads. A compact high-frequency transformer is adopted in the DAB module， enabling the galvanic isolation between the input terminal and the output terminal. The serial-parallel balancing control is presented for the modular DAB converter

which is efficient

reliable and communication-free. As a result

there is the same droop relationship between the output-series voltage and the input-parallel voltage in each module. The electromagnetic transient simulation results show that the power of the DC substation is equally distributed among the DAB modules

so the input DC currents and output DC voltages of the modules can be kept balanced.

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references

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兆瓦级光伏中压直流并网变换器研制及实证应用