Improved Two-Level Voltage Source Converter for High-Voltage Direct Current Transmission Systems

被引：13

作者：

Adam, Grain Philip ^{[1
]}

Abdelsalam, Ibrahim ^{[2
]}

Fletcher, John Edward ^{[3
]}

Xu, Lie ^{[1
]}

Burt, Graeme M. ^{[1
]}

Holliday, Derrick ^{[1
]}

Finney, Stephen Jon ^{[4
]}

机构：

[1] Univ Strathclyde, Elect & Elect Engn Dept, Glasgow G1 1XW, Lanark, Scotland

[2] Arab Acad Sci & Technol & Maritime Transport, Giza, Egypt

[3] Univ New South Wales, Sydney, NSW 2052, Australia

[4] Univ Edinburgh, Sch Engn, Edinburgh EH8 9YL, Midlothian, Scotland

来源：

IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS | 2017年 / 5卷 / 04期

基金：

澳大利亚研究理事会;

关键词：

AC and dc fault ride-through capability; high-voltage dc (HVDC) transmission systems; modular multilevel converter; two-level voltage source converter (I2L-VSC); MODULAR MULTILEVEL CONVERTERS; PULSE-WIDTH MODULATION; ELECTROMAGNETIC TRANSIENTS;

D O I：

10.1109/JESTPE.2017.2723839

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

080906 [电磁信息功能材料与结构]; 082806 [农业信息与电气工程];

摘要：

This paper presents an improved two-level voltage source converter for dc transmission systems with relatively low rated power and dc operating voltage. Unlike conventional two-level converter, the presented converter employs two distributed cell capacitors per three phase; thus, do not contribute any current when converter is blocked during dc short-circuit fault as in modular multilevel converter case. The use of three-phase cells is proven to be beneficial because the arm currents do not contain second-order harmonic currents, and cell capacitors tend to be small as they only experience high-order harmonic current associated with the switching frequency. For the same rated dc-link voltage and switching devices, the rated power of the improved two-level converter will be twice than that of the conventional two-level converter. Averaged, switching function, and electromagnetic transient simulation models of the improved two-level converter are discussed and validated against detailed switch model. The viability of the improved two-level converter for high-voltage dc applications is examined, considering dc and ac short-circuit faults. Besides, reduced complexity of the control and power circuit of the improved two-level converter, it has been found that its transient responses to ac and dc faults are similar to that of the modular multilevel converter.

引用

页码：1670 / 1686

页数：17

共 59 条

[1]

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[2]

Adam GP, 2014, PROC IEEE INT SYMP, P1390, DOI 10.1109/ISIE.2014.6864817

[3]

Modular multilevel inverter: pulse width modulation and capacitor balancing technique [J].