Protecting a HVDC link against accidental isolation from its receiving AC system

Author

Whitehouse, R.S.

Author_Institution

GEC Alsthom Transmission & Distribution Projects Ltd., Stafford, UK

Volume

8

Issue

3

fYear

1993

fDate

7/1/1993 12:00:00 AM

Firstpage

1586

Lastpage

1590

Abstract

When a high-voltage DC (HVDC) scheme is isolated from its receiving AC system, the inverter may continue to operate, generating its own AC bus voltages; this is defined as islanding. If islanding is allowed to continue unrestricted, main circuit components may in some conditions be damaged. It is therefore necessary to provide a suitable protection system. The author describes a protection scheme developed for an HVDC link that prevents damage due to islanding while still permitting the link to automatically restart on reclosure of the isolating breaker. Oscillograms showing the protection in operation on both the GEC ALSTHOM HVDC simulator and during tests carried out as part of the commissioning of the McNeill HVDC link are included.<>

Keywords

DC power transmission; circuit breakers; commissioning; digital simulation; invertors; power system analysis computing; power system interconnection; power system protection; testing; AC bus voltages; HVDC link; accidental isolation; commissioning; digital simulation; inverter; islanding; isolating breaker; power system protection; receiving AC system; reclosure;

fLanguage

English

Journal_Title

Power Delivery, IEEE Transactions on

Publisher

ieee

ISSN

0885-8977

Type

jour

DOI

10.1109/61.252684

Filename

252684