go to top scroll for more

Projects: Projects for Investigator
Reference Number	NIA2_NGESO035
Title	Practical Transition into wider EMT GB Modelling
Status	Started
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 plc
Award Type	Network Innovation Allowance
Funding Source	Ofgem
Start Date	01 July 2023
End Date	31 March 2025
Duration	ENA months
Total Grant Value	£350,000
Industrial Sectors	Power
Region	London
Programme	Network Innovation Allowance
Investigators	Principal Investigator	Project Contact , National Grid plc (100.000%)
	Industrial Collaborator	Project Contact , National Grid plc (0.000%)
Web Site	https://smarter.energynetworks.org/projects/NIA2_NGESO035
Objectives	"This project seeks to achieve two main objectives:Improve the efficiency of EMT simulations, with the overall objective of running the National Grid (England & Wales) Electricity network model in PSCAD to achieve practical run time.Deliver enhanced GB EMT model with validation reportsDeliver supporting tools in PSCAD allowing for testing and reviewProduce technical guidance outlining scenarios where EMT simulations are necessary under system critical conditions. These objectives will be achieved by breaking down the problem into smaller tasks. To achieve the first objective, some methods that will be investigated are: Improved network matrix solution methods to accelerate solution speed of network admittance matrix. Improve the efficiency of calculating Y matrix formulation Parallel computing of submodulesIdentify if complex control systems of generators and inverters contribute to simulation speed and investigate improvements. Investigate if new methods can be adopted to partition the network matrix for parallel processing. Computationally efficient yet accurate representation of power electronic inverters models – average representation of switching devicesImproved computer hardware and lower latency when exchanging information between processors. These tasks are expected to significantly reduce the simulation time of full GB EMT model while maintaining the accuracy and quality of the results. To produce the EMT scenarios technical guidance the following tasks can be done: Prepare the technical guidelines to determine when EMT simulations are necessaryPerform the simulations and verify the guidelines based on both RMS and EMT simulation results (simulation performed on the GB network) The project will be delivered in two work packages: WP1 - Research & Development to improve the efficiency of EMT simulations run timeWP2 - Technical Guide to determine when EMT simulations are necessary In line with the ENAs ENIP document, the risk rating is scored Low.TRL Steps = 1 (2 TRL steps) Cost = 1 (£350k) Suppliers = 1 (1 supplier) Data Assumptions = 2 Total = 5 (Low) " "With Great Britains (GB) power system moving towards net zero carbon operation, the number of inverter-based resources (IBR) is expected to increase. The amount of synchronous generation in the grid will decline, reduced system inertia and lower short circuit levels significantly changing the characteristics of the GB network. EMT simulation are particularly required for weak grid locations experience significant voltage variations, especially in phase angle, following system disturbances. Accurate measurement of phase angle changes through the Phase Locked Loop (PLL) is crucial for the grid-following inverter response. Inaccurate tracking by the PLL can result in poor fault recovery or unit tripping, violating grid codes.Additionally, Voltage control is challenging in weak locations, particularly when multiple nearby inverter-based devices with fast reactive current control interact unstably, leading to various control interaction issues. Conventional RMS analysis can no longer accurately identify system security risks during these conditions. Therefore, EMT analysis is required to conduct research to determine system operational risks with high penetration of IBRs. EMT simulations take much longer than RMS simulations, even for simple networks. The currently developed full GB EMT model developed through a separate innovation project takes a few hours to run in PSCAD. Furthermore, with the increasing number of IBR sources in the GB system, EMT simulations must be carried out for many scenarios and several contingency cases to analyse system stability. There is an increasing need to develop a capability to carry out multiple EMT analyses, for a more comprehensive network, with reduced simulation time. Additionally, strategies must be developed to correctly identify scenarios requiring EMT analysis more than RMS analysis, as more effort is required for network modelling for EMT analysis. The project will aim to enhance the GB networks EMT model by improving the models computational efficiency, which will help the ESO investigate more scenarios with stability risks while transitioning into zero carbon operation. It will also provide technical guidance outlining scenarios where EMT simulations are necessary under critical system conditions. " "The project has two main objectives: Research and development will be performed to improve the efficiency of EMT simulations, with the overall objective of running the National Grid (England & Wales) Electricity network model in PSCAD to achieve practical run time.Produce technical guidance outlining scenarios where EMT simulations are necessary under critical system conditions. "
Abstract	"As the number of IBR sources in the GB system continues to rise, it becomes essential to conduct numerous Electromagnetic Transient (EMT) simulations across various scenarios and contingency cases to assess system stability. Consequently, there is an escalating demand for the development of the ability to perform multiple EMT analyses to facilitate broader network studies while keeping simulation times manageable and practical.This project aims to develop innovative approaches for expediting simulation times required to execute the comprehensive GB EMT model. It will also offer technical insights to ascertain the imperative need for EMT simulations during critical system conditions."
Publications	(none)
Final Report	(none)
Added to Database	01/11/23