Hierarchical control system of modular multilevel converter used in high-voltage direct current transmission

Author

Boran Fan ; Kui Wang ; Zedong Zheng ; Yongdong Li ; Xiaokun Wu

Author_Institution

Dept. of Electr. Eng., Tsinghua Univ., Beijing, China

fYear

2014

fDate

22-25 Oct. 2014

Firstpage

3584

Lastpage

3589

Abstract

Based on cascade of MMC power units, the simple topology of Modular Multilevel Converter (MMC) tends to meet the need of High voltage direct current transmission (HVDC) more easily than other topologies. However, following the rising of voltage level, the number of MMC power unit increases and put forward high performance request for the control system. In these cases, using traditional centralized control system may seriously affect the feasibility and reliability of MMC system. This paper proposes a novel hierarchical control system constituted by a main controller, valve controllers and unit controllers. Relevant hierarchical control method was designed and has been verified by simulation and experiments.

Keywords

HVDC power convertors; HVDC power transmission; hierarchical systems; HVDC; MMC power units; centralized control system; hierarchical control method; hierarchical control system; high-voltage direct current transmission; modular multilevel converter; unit controllers; valve controllers; Bridge circuits; Capacitors; Control systems; Frequency control; Topology; Valves; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Machines and Systems (ICEMS), 2014 17th International Conference on

Conference_Location

Hangzhou

Type

conf

DOI

10.1109/ICEMS.2014.7014111

Filename

7014111