A Modular DC-DC Converter as a Hybrid Interlink Between Monopolar VSC and Bipolar LCC-Based HVDC Links and Fault Management

被引：4

作者：

Dey, Saurav ^{[1
]}

Bhattacharya, Tanmoy ^{[1
]}

Samajdar, Debdeep ^{[1
]}

机构：

[1] Indian Inst Technol Kharagpur, Dept Elect Engn, Kharagpur 721302, India

来源：

IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS | 2023年 / 59卷 / 04期

关键词：

HVdc; hybrid interconnection; line topology; MMC-based DC-DC converter; multi-terminal operation; short-circuit DC fault;

D O I：

10.1109/TIA.2023.3269414

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

High voltage dc (HVdc) transmission has gradually gained its popularity in long distance transmission of power. The possibility of multi-terminal HVdc network has further projected HVDC as a potential mode of power trading across geographical boundaries. The emergence of modular multilevel converter (MMC)-based dc-dc converters has led to the interconnection of HVdc networks across voltage levels, converter technologies and line topologies. This paper puts forward a topological modification in an existing MMC-based dc-dc converter topology, acting as a hybrid interconnect between different converter technologies, for interface of an asymmetric monopolar voltage source converter (VSC) and a bipolar line commutated converter (LCC)-based HVdc links. The proposed operation of the topology is validated experimentally in a down-scaled laboratory prototype. The proposed topology is further investigated for short-circuit fault conditions in any of the poles of HVdc bus and appropriate fault mitigation strategies are adopted for short-cicuit fault in both LCC and VSC bus. The fault mitigation strategies are validated by simulation in Matlab/Simulink platform.

引用

页码：4342 / 4352

页数：11