Impedance Scan Methods

Completed

Other Power and Storage Technologies(Electricity transmission and distribution)

Applied Research and Development

ENGINEERING AND TECHNOLOGY (Electrical and Electronic Engineering)

Not Cross-cutting

Project Contact
National Grid Electricity Transmission

Network Innovation Allowance

Ofgem

02 January 2023

29 February 2024

ENA months

£359,000

Power

London

Network Innovation Allowance

Project Contact, National Grid Electricity Transmission

Project Contact, SPEN - SP Transmission Plc
Project Contact, SSEN Scottish Hydro Electric Transmission

Project Contact, Scottish and Southern Energy plc
Project Contact, National Grid plc
Project Contact, SP Energy Networks

"Method:The project will investigate a method to perform comprehensive impedance scans on PSCAD models of any three-phase electrical network. Methods using such impedance responses for grid-level stability studies will also be investigated. In this project, these methods will be applied in GB context; their accuracy, computational requirements, and scalability will be evaluated through this project. The project will also enable National Grid, other Transmission operators and system operator to perform similar studies in the future for power converter integration or for existing interconnections for post-mortem analysis of a stability event. Data Quality Statement (DQS): The project will be delivered under the NIA framework in line with OFGEM, ENA and NGET internal policy. Data produced as part of this project will be subject to quality assurance to ensure that the information produced with each deliverable is accurate to the best of our knowledge and sources of information are appropriately documented. All deliverables and project outputs will be stored on our internal SharePoint platform ensuring backup and version management. Relevant project documentation and reports will also be made available on the ENA Smarter Networks Portal and dissemination material will be shared with the relevant stakeholders. Measurement Quality Statement (MQS): The methodology used in this project will be subject to suppliers own quality assurance regime and the source of data, measurement process and equipment as well as data processing will be clearly documented and verifiable. The measurements, designs and economic assessments will also be clearly documented in the relevant deliverables and final project report and made available for review. Risk Assessment and AuditIn line with the ENAs ENIP document, the risk rating is scored low. TRL Steps = 1 (1 TRL step) Cost = 1(£359,000) Suppliers = 1 (1 suppliers) Data Assumption = 1 (Data will be gathered using available network model) " "Work package 1 [M1-M6

Dynamic stability is a major concern in maintaining the security of power grids with high shares of power electronics-based resources. Stability analysis tools are needed to evaluate the impacts of power electronics converters on system stability at slow and fast time scales. This project will investigate a new impedance scan method, which provides a more accurate impedance representation to investigate stability challenges associated with power electronics connections. If the project is successful, it will enable power engineers to do similar studies in the future and obtain a more accurate impedance representation.

18/10/23