Mar 2015
Electricity Transmission
Protection Settings to Cater for the Evolving Transmission Network
Mar 2015
Jul 2015
SP Energy Networks and SP Transmission
James Yu (Future Networks Manager)
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Network Innovation Allowance
The suitability of the identified methods and tools, and their associated advantages and limitations, will be assessed and compared along with initial recommendations on the most suitable tool(s) to be used in the future. This activity will also consider existing resources and practices that are utilised within ScottishPower, e.g. the DIgSILENT PowerFactory GB power system model, protection settings registers and databases, ten year statement and other “outlook” documents published by National Grid (including the recently-published “System Operability Framework” document), protection settings policy documents, etc. A validation process will be proposed with the use of the identified and proposed selected tool(s) in conjunction with the appropriate existing resources.

This will act as an initial specification for a future second stage of the project, which will be concerned with population and configuration of the identified tool(s) to enable the validation process to be rolled out across the entire population of ScottishPower transmission protection schemes and utilised as a “business as usual” activity.

If possible, a demonstration and verification of the proposed process using an agreed case study will be undertaken and included in the report and presentation of findings at the end of the project, subject to availability of the identified settings validation tools(s) and appropriate resources to facilitate the execution of the case study.

The benefits of undertaking this work are that the risk of unexpected and incorrect protection operations in the future will be quantified, enabling appropriate mitigation plans to be put in place. The cost of future potential partial or total system blackouts could therefore be avoided.

The project objectives are as follows:

  • A comprehensive review of the existing techniques and tools identifying associated advantages, limitations and costs.
  • Selection of one (or several) tools that are most suitable for the intended application, along with the development of a process for protection settings validation and performance verification using the selected tool(s).
  • Assessment of the suitability and feasibility of the proposed process and the tool through actual validation exercise using network and protection setting data.
  • Identify a route forward to adopt the method and tool(s) for business as usual activity.

The project will be considered successful if the aforementioned project objectives are realised.