Test and evaluation of non conventional instrument transformers and sampled value process bus on Powerlink's transmission network

Schaub, Pascal, Haywood, John, Ingram, David M.E., Kenwrick, Anthony, & Dusha, Geoff (2011) Test and evaluation of non conventional instrument transformers and sampled value process bus on Powerlink's transmission network. In 2011 South East Asia Protection and Control Conference (SEAPAC 2011), 2011-03-09 - 2011-03-11.

Accepted Version
seapac_2011
(Hosted at QUT ePrints)

Abstract

IEC 61850 Process Bus technology has the potential to improve cost, performance and reliability of substation design. Substantial costs associated with copper wiring (designing, documentation, construction, commissioning and troubleshooting) can be reduced with the application of digital Process Bus technology, especially those based upon international standards. An IEC 61850-9-2 based sampled value Process Bus is an enabling technology for the application of Non-Conventional Instrument Transformers (NCIT). Retaining the output of the NCIT in its native digital form, rather than conversion to an analogue output, allows for improved transient performance, dynamic range, safety, reliability and reduced cost. In this paper we report on a pilot installation using NCITs communicating across a switched Ethernet network using the UCAIug Implementation Guideline for IEC 61850-9-2 (9-2 Light Edition or 9-2LE). This system was commissioned in a 275 kV Line Reactor bay at Powerlink Queensland’s Braemar substation in 2009, with sampled value protection IEDs 'shadowing' the existing protection system. The results of commissioning tests and twelve months of service experience using a Fibre Optic Current Transformer (FOCT) from Smart Digital Optics (SDO) are presented, including the response of the system to fault conditions. A number of remaining issues to be resolved to enable wide-scale deployment of NCITs and IEC 61850-9-2 Process Bus technology are also discussed.

  • Keywords: Ethernet networks, IEC 61850, IEC 61869, IEEE 1588, UCA 9-2 Light Edition, fibre optic current transformer, merging units, non conventional instrument transformer, performance evaluation, protection application, sampled value process bus
  • Item Type: Conference Contribution
  • Pure ID: 57227797
  • QUT ePrints
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