Load blinding stabilisation for DOC relays subjected to reverse load flow

Author

Wixon, A. ; Venkataraman, K. ; Newman, Paul ; Maleka, K.

Author_Institution

Alstom Grid Substation Autom. Solutions, Stafford, UK

fYear

2014

fDate

March 31 2014-April 3 2014

Firstpage

1

Lastpage

9

Abstract

Evolution of modern power systems have seen an increase in the generation at the distribution end of the system, thus bringing to an end the uni-directional power flow of traditional systems. Reverse load flow from distribution to transmission is now becoming more common, which is problematic for the DOC protection which could mal-operate if the exported load exceeds the current threshold. This paper discusses the use of load blinders to prevent mal-operation of the DOC relay during export conditions, whilst maintaining maximum sensitivity for resistive faults on the sub-transmission network.

Keywords

load flow; overcurrent protection; power system stability; power transmission faults; power transmission protection; relay protection; DOC relay protection; directional overcurrent protection; load blinding stabilisation; mal-operation prevent; power distribution system; power generation system; power transmission system; resistive fault; reverse load flow; subtransmission network; unidirectional power flow;

fLanguage

English

Publisher

iet

Conference_Titel

Developments in Power System Protection (DPSP 2014), 12th IET International Conference on

Conference_Location

Copenhagen

Print_ISBN

978-1-84919-834-9

Type

conf

DOI

10.1049/cp.2014.0077

Filename

6822885