A thyristor based series power flow control device for multi-terminal HVDC transmission

Author

Tianqi Zhang ; Chuanyue Li ; Jun Liang

Author_Institution

Cardiff Univ., Cardiff, UK

fYear

2014

fDate

2-5 Sept. 2014

Firstpage

1

Lastpage

5

Abstract

This paper achieves flexible power flow control by inserting a DC voltage to a line of MTDC transmission. A thyristor based power flow control device is designed to generate this inserted DC voltage. Three-phase six-pulse rectifier using thyristor can convert an AC voltage from AC generator or AC grid to a DC voltage. Power exchange occurs between the AC voltage terminal and DC grids without causing extra power losses which would be found if an inserted resistance is used. A control system is designed for the device and for the power flow control. This design is simulated by using PSCAD/MTDC and evaluated under different operation conditions. The control system is evaluated. Power flow control method is evaluated. This simulation proves the capability of the device to control the power flow effectively.

Keywords

AC generators; DC transmission networks; HVDC power transmission; load flow control; thyristor convertors; AC generator; AC grid-DC voltage; AC voltage terminal; DC grids; MTDC transmission; PSCAD/MTDC; multiterminal HVDC transmission; thyristor based power flow control device; Converters; HVDC transmission; Load flow; Load flow control; Reactive power; Thyristors; Voltage control; Multi-Terminal HVDC; Series Power Flow Controller; Thyristor;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Engineering Conference (UPEC), 2014 49th International Universities

Conference_Location

Cluj-Napoca

Print_ISBN

978-1-4799-6556-4

Type

conf

DOI

10.1109/UPEC.2014.6934802

Filename

6934802