Jan 2017
Electricity Transmission
EPRI Research Collaboration on Substations (P37) 2017 - 2020
NIA_NGET0210
Live
Jan 2017
Apr 2021
National Grid Electricity Transmission
Ruth Hooton, Gordon Wilson, & Andrew Roxbrough
Click here to send a question to the contact.
Network Innovation Allowance
None
Substations and Electricity Transmission Networks
£23,800,000.00
EPRI research projects span multiple years. The full scope of research within each work-stream for the next two years in respect of P37.111 and four years in relation to P37.101 & P37.108 is listed below.P37.101 - Transformer Life ManagementThe transformer programme develops new tools and knowledge to help utilities anticipate and prevent failures in transformers, extend transformer life, develop and retain key expertise. With the increasing need to maintain the same levels of reliability, managing ageing assets is a critical issue. This project addresses these key issues including transformer diagnostics, condition and ageing assessments and life extension by considering:

  • Transformer on-line monitoring technologies

  • Novel sensor development

  • EPRI power transformer guidebook

  • Improved accuracy of transformer remaining life estimation

  • Transformer life extension

  • Transformer forensics – linking diagnostics and maintenance with true internal condition

  • Transformer ratings

P37. 108 - SF6 Management and Gas Insulated SubstationsThe SF6 and GIS programme is helping utilities reduce maintenance costs and uncertainties, minimise SF6 emissions through the application of new technology, and improve GIS and GIL life-cycle management through the following:

  • Investigating more effective methods for locating and repairing SF6 leaks

  • Developing a system for capturing SF6 when in-service repair is not viable

  • Developing and documenting methodologies for accurately capturing SF6 data for regulatory reporting

  • Developing a fleet management approach for optimal decisions regarding new investment, maintenance, repair and replacement of components

  • Developing an approach to assess the impact of SF6 technology compared to alternative technologies and gases

  • Development of an industry-wide failure database

  • Develop guidelines for live filling of SF6 insulated equipment

  • Development of a comprehensive guidebook to enhance the utility knowledge base and provide a one-stop reference for GIS and GIL equipment

  • Create application guides to aid utility engineers and field personnel with SF6 diagnostic technologies

  • Identify and evaluate available technologies for GIS and GIL diagnostics and evaluate emerging diagnostic technologies

  • Develop a total life-cycle, systems based approach to compare gas-insulated and air insulated substation investments

The objectives over the next four years include the delivery of a selection of reports and guidance documents associated with the three work-streams.

P37.101 - Transformer Life Management

  • Transformer on-line monitoring technologies

Technology approaches to on-line gas analysis will continue from previous years of research, the scope will be extended to include the length of sampling lines and the temperatures of the environment as, through the previous studies and testing they have been found to be influential in the success of the techniques

  • Novel sensor development

Research new sensors for assessing the condition of a transformer. The scope will be extended to include technologies used within other industries for gasses such as methane

  • EPRI power transformer guidebook

Develop improved knowledge in the area of technological advances. The development of the guidebook is built upon, year on year

  • Improved accuracy of transformer remaining life estimation

Continue to research the dynamic behaviour of new chemical markers in oil and whether it has the potential for improving transformer life estimates

  • Transformer life extension

Continue to research life extension and seek to quantify potential cost savings of any new technology so that it can be accurately benchmarked

  • Transformer forensics – linking diagnostics and maintenance with true internal condition

Continue to examine retired or failed transformers and relate the evidence to both historic transformer operations and diagnostics data

  • Transformer ratings

Continue to develop EPRI’s rating enhancement software (PTLoad) which will be integrated into the Transmission Ratings Workstation (TRW) to move towards facilitating common transmission rating practices across equipment boundaries

P37. 108 - SF6 Management and Gas Insulated Substations
The intent of this programme is to help users of SF6 circuit breakers and gas insulated substations through research and development of methods and processes to reduce maintenance costs. It will also help to minimise degradation of equipment, minimise the risk of equipment failure, and minimise the potential for SF6 emissions by applying new technologies and improving GIS and GIL equipment life-cycle management.

GIS and GIL equipment research and development focuses on developing methods, technologies, and support documentation to help utilities make prudent asset management decisions. These decisions are necessary to minimise GIS and GIL equipment life-cycle costs and maximise equipment performance within an acceptable risk level.

P37.111 - Risk based substation equipment asset management
This programme conducts research with the goal of providing continually improved risk-based decision-support methodologies for substation equipment asset managers. It envisages that the developments will lead to an integrated framework for asset risk assessment, mitigation, and performance improvement. Developments in risk-based fleet management are addressed through the following tasks:

  • Asset characterisation and performance information: Continued development for transformers, circuit breakers, relays, surge arresters, capacitor voltage transformer (CCVT), substation batteries and ground grid
  • Industry wide equipment performance and failure database and analytics: Continued development of the database to include failure and performance data
  • Asset health algorithms and software: Continued development of the software tools and algorithms within Power Transformer Expert (PTX)
  • Substation equipment asset management guidelines: Continued development of the asset management and maintenance practice guidelines
  • Triggers and alarms for maintenance actions: Continued development of the algorithms to ensure that international standards and guidelines are followed
  • Evaluation of DGA analytics: Continued development of the performance assessments as new data is becoming available
  • Asset management guidelines: Continued development to include the incorporation of additional case studies in order to enhance the guidelines
  • Asset management workshop: Annual conference to assist technology transfer
Continuing to expand National Grid’s knowledge and deliver value to our stakeholders, participation in P37 during the next four years will provide access to rolling updates on the three project work-streams.P37.101 –Transformer life management:

  • Transformer on-line monitoring technologies

Technology approaches to on-line gas analysis will continue from previous years of research. The scope will be extended to include the length of sampling lines and the temperatures of the environment as through the previous studies and testing they have been found to be influential in the success of the techniques.

  • Novel sensor development

Research new sensors for assessing the condition of a transformer; the scope will be extended to include technologies used within other industries for gasses such as methane

  • EPRI power transformer guidebook

Develop improved knowledge in the area of technological advances. The development of the guidebook is built upon, year on year. The updated guidebook will be published during 2017

  • Improved accuracy of transformer remaining life estimation

Continued research into the dynamic behaviour of new chemical markers in oil and whether it has the potential for improving transformer life estimates

  • Transformer life extension

Research life extension and will also seek to quantify potential cost savings of any new technology so that it can be accurately benchmarked

  • Transformer forensics – linking diagnostics and maintenance with true internal condition

Examination of retired or failed transformers relating the evidence found to both historic transformer operations and diagnostics data

  • Transformer ratings

Develop EPRI’s rating enhancement software (PTLoad) which will be integrated into the Transmission Ratings Workstation (TRW) to move towards facilitating common transmission rating practices across equipment boundaries

P37. 108 - SF6 Management and Gas Insulated Substations:

  • Development of the research and development of methods and processes to reduce maintenance costs, minimise degradation of equipment, minimise the risk of equipment failure, and minimise the potential for SF6 emissions by applying new technologies and improving GIS and GIL equipment life-cycle management