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Projects: Projects for Investigator
Reference Number NIA_NGET0192
Title SIM - Samuel Inertia Element
Status Completed
Energy Categories Other Power and Storage Technologies(Electricity transmission and distribution) 100%;
Research Types Applied Research and Development 100%
Science and Technology Fields ENGINEERING AND TECHNOLOGY (Electrical and Electronic Engineering) 100%
UKERC Cross Cutting Characterisation Not Cross-cutting 100%
Principal Investigator Project Contact
No email address given
National Grid Electricity Transmission
Award Type Network Innovation Allowance
Funding Source Ofgem
Start Date 01 August 2016
End Date 01 June 2017
Duration 10 months
Total Grant Value £232,000
Industrial Sectors Power
Region London
Programme Network Innovation Allowance
Investigators Principal Investigator Project Contact , National Grid Electricity Transmission (100.000%)
Web Site http://www.smarternetworks.org/project/NIA_NGET0192
Objectives This project seeks to: 1. Verify if GB system inertia can be directly measured2. Identify daily trends, over a six month period. Measurement of system inertia comparable to current calculation. Inertia measurements throughout the day and week for a 6 month period. Project report detailing findings and capability to provide an ongoing operational service of inertia measurement.
Abstract System inertia on the GB system is slowly declining, with the closure of aging power stations and the increased levels of renewable generation displacing conventional power stations. There is currently no known method, nor operational tools, to take a direct real-time measurement of system inertia. The real-time value of inertia on the GB system is currently estimated from known synchronised generator design parameters and an estimated value for that inertia contribution provided by the embedded generation within the Distribution Networks. This means that there will be inaccuracies in the determined inertia value. The project aims to test the assumptions made in National Grid’s current method for evaluating inertia as inaccuracies in the inertia calculation would either lead to increased balancing costs or a reduction in system security. With a network of real-time high precision Frequency Measurement Units already installed around GB, the project can also study the regional characteristics of inertia. Research: This project will utilise the Grid Data Measurement System technology demonstrated in Project Samuel (NIA_NGET0119) to undertake a six month study of the GB transmission system inertia. The project will reuse the existing 5 load banks of 600kW each installed in the Samuel project to induce small changes in the system frequency by switching the loads on and off. In Phase 1 of this project, the load banks from Project Samuel will be remediated for the deliverables of Project SIM. Then switching sequences will be run, and the frequency data from a network of Frequency Measurement Units will be analysed to give an initial inertia estimate and prove that the method is robust, and comparable to the values presently calculated. Phase 2 will then continue the measurement period for 6 months, across times and days, to provide the full study data. Work will also be ongoing to refine switching and measurement techniques to attain the best accuracy possible. Noise on the system will be filtered out using signal analysis techniques to maximise the gain of the transmitted signal. This project will be the first time that system inertia has been able to be measured from a direct real-time impulse-response approach, which potentially offers a more accurate way of measuring system inertia and being able to do so on an on-going basis.Note : Project Documents may be available via the ENA Smarter Networks Portal using the Website link above
Publications (none)
Final Report (none)
Added to Database 11/12/18