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具备故障阻断能力的柔性直流输电DC/DC变换器
作者:
作者单位:

哈尔滨工业大学电气工程及自动化学院,黑龙江省哈尔滨市 150001

作者简介:

李彬彬(1989—),男,通信作者,博士,副教授,主要研究方向:柔性直流输电技术、可再生能源发电技术、模块化多电平技术等。E-mail: libinbinhit@126.com
张玉洁(1996—),女,硕士研究生,主要研究方向:电力系统柔性一次设备。E-mail: Zhang_Yujie89@163.com
张书鑫(1989—),男,博士研究生,主要研究方向:电力系统柔性一次设备。E-mail: zhang_shu_xin@126.com

通讯作者:

基金项目:

国家重点研发计划资助项目(2018YFB0904600);国家自然科学基金资助项目(51807033)。


DC/DC Converter with Fault Blocking Capability for HVDC Transmission System
Author:
Affiliation:

School of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin 150001, China

Fund Project:

This work is supported by National Key R&D Program of China (No. 2018YFB0904600) and National Natural Science Foundation of China (No. 51807033).

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    摘要:

    高压大容量DC/DC变换器作为未来直流电网中的关键设备,近年来成了国内外关注的热点。文中通过将晶闸管和半桥子模块进行有机组合,提出了一种混合式DC/DC变换器拓扑,通过闭锁子模块和晶闸管实现高低压侧短路故障阻断功能,且具有成本低、效率高的优点。对该拓扑结构的工作原理、故障保护机制、控制策略、参数设计和经济性等方面进行了分析论证。最后,搭建了MATLAB/Simulink仿真模型,仿真结果验证了该拓扑和控制策略的可行性。

    Abstract:

    As the key equipment for the future DC power grid, the high-voltage and high-capacity DC/DC converter has become the hot research topic in recent years. This paper proposes a hybrid DC/DC converter topology combing thyristors with half-bridge sub-modules. The hybrid DC/DC converter can block the short-circuit faults on the high-voltage and low-voltage sides by latching sub-modules and thyristors, and has the advantages of low cost and high efficiency. The working principle, fault protection mechanism, control strategy, parameter design and economy of the topology are analyzed and demonstrated. Finally, the feasibility of the proposed topology and control strategy are verified by simulation results based on MATLAB/Simulink.

    表 1 本文所提出的拓扑与其他拓扑的对比Table 1 Comparison between the proposed topology and other topologies
    图1 具备故障阻断能力的DC/DC变换器拓扑结构Fig.1 Topology of DC/DC converter with fault blocking capability
    图2 具备故障阻断能力的DC/DC变换器工作原理Fig.2 Working principle of DC/DC converter with fault blocking capability
    图3 P>0时直流高压侧短路故障的电路图Fig.3 Circuit diagram of short-circuit faults on high-voltage side when P>0
    图4 P<0时直流低压侧短路故障的电路图Fig.4 Circuit diagram of short-circuit faults on low-voltage side whenP<0
    图5 具备故障阻断能力的DC/DC变换器控制框图Fig.5 Block diagram of control of DC/DC converter with fault blocking capability
    图 故障判断框图Fig. Block diagram of fault judgment
    图 高压DC/DC变换器拓扑结构图Fig. Topology of HVDC DC/DC converter
    表 2 Table 2
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引用本文

李彬彬,张玉洁,张书鑫,等.具备故障阻断能力的柔性直流输电DC/DC变换器[J].电力系统自动化,2020,44(5):53-59. DOI:10.7500/AEPS20190730002.
LI Binbin,ZHANG Yujie,ZHANG Shuxin,et al.DC/DC Converter with Fault Blocking Capability for HVDC Transmission System[J].Automation of Electric Power Systems,2020,44(5):53-59. DOI:10.7500/AEPS20190730002.

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历史
  • 收稿日期:2019-07-30
  • 最后修改日期:2019-12-03
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  • 在线发布日期: 2020-03-08
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