Mar 2013
Electricity Transmission
Architecture for Substation Secondary System (AS3) Project
Mar 2013
National Grid Electricity System Operator
National Grid TO Innovation Team
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Innovation Funding Incentive
Asset Management
To form a new policy for substation light current systems aimed at maintaining high availability and reliability of the transmission network by balancing the whole life-cycle risk, performance and cost of assets.

To develop a new architecture for substation secondary systems by introducing new technologies, targeting a quicker and easier approach for the installation and replacement of protection and control equipment beyond 2011.

The project has defined the following objectives.

Review of current policy and practice:

  • To identity and understand the whole life cycle issues for the existing protection and control systems

Strategy document for substation secondary systems:

  • To develop a road map to show the strategy for the application of protection and control new technology in the short, medium and long term

Feasibility Study:

  • To investigate new technologies

  • To collaborate with major suppliers/Alliances to share information

  • To standardise Substation primary and secondary system interface

  • To benchmark with leading utilities

Trials and Pilot schemes:

  • To try the new approach in parallel with existing systems with outputs disabled ‘Piggy-back’ trials

  • To apply the new approach to some real projects as pilot schemes (Min 2)

New Policy:

  • To develop a new policy for the substation secondary system

  • To develop associated technical specifications.