Uninterrupted power supply in VSC-MTDC

Author

Ding, Tao ; Zhang, Chengxue

Author_Institution

Sch. of Electr. Eng., Wuhan Univ., Wuhan, China

fYear

2010

fDate

19-22 April 2010

Firstpage

1

Lastpage

6

Abstract

The paper puts forward an idea that Multi-terminal DC HVDC with VSCs (VSC-MTDC) can run for a period with some types of DC faults during which the fault is cleared and then the appointed transformer´s neutral in VSC is connected to ground to rebalance two-pole´s voltages of DC capacitors. The AC-circuit breakers (AC-CBs) and fast DC switches (SW) stalled in two end of each DC line are used to extinguish DC fault current and isolate fault line utilizing one specific VSC to control the current through fault line to cross zero. Simulation on PSCAD/EMTDC shows the idea is reasonable and the methods advanced in the paper are feasible and effective and the passive loads connected to the system are supplied uninterrupted power.

Keywords

Capacitance; Circuit faults; Converters; Fault detection; HVDC transmission; Insulated gate bipolar transistors; Load flow; Power conversion; Power supplies; System testing; AC-circuit breakers; DC fault detection; DC voltage balancing; HVDC; VSC-MTDC; city-infeed; isolating DC fault line; power supply; transformer connection; zero sequence current;

fLanguage

English

Publisher

ieee

Conference_Titel

Transmission and Distribution Conference and Exposition, 2010 IEEE PES

Conference_Location

New Orleans, LA, USA

Print_ISBN

978-1-4244-6546-0

Type

conf

DOI

10.1109/TDC.2010.5484489

Filename

5484489