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Projects: Projects for Investigator
Reference Number	NIA2_NGET0020
Title	Co-Simulation
Status	Started
Energy Categories	Other Cross-Cutting Technologies or Research(Energy Models) 80%; Other Power and Storage Technologies(Electricity transmission and distribution) 20%;
Research Types	Applied Research and Development 100%
Science and Technology Fields	PHYSICAL SCIENCES AND MATHEMATICS (Statistics and Operational Research) 10%; PHYSICAL SCIENCES AND MATHEMATICS (Computer Science and Informatics) 10%; ENGINEERING AND TECHNOLOGY (Electrical and Electronic Engineering) 80%;
UKERC Cross Cutting Characterisation	Systems Analysis related to energy R&D (Energy modelling) 100%
Principal Investigator	Project Contact No email address given National Grid Electricity Transmission
Award Type	Network Innovation Allowance
Funding Source	Ofgem
Start Date	01 July 2022
End Date	30 June 2024
Duration	ENA months
Total Grant Value	£300,000
Industrial Sectors	Power
Region	London
Programme	Network Innovation Allowance
Investigators	Principal Investigator	Project Contact , National Grid Electricity Transmission (100.000%)
	Industrial Collaborator	Project Contact , National Grid plc (0.000%) Project Contact , Scottish and Southern Energy plc (0.000%) Project Contact , SP Energy Networks (0.000%)
Web Site	https://smarter.energynetworks.org/projects/NIA2_NGET0020
Objectives	The project will evaluate the feasibility of a co-simulation modelling approach between Digsilent PowerFactory and PSCAD. This project aims to develop an innovative modelling approach which takes advantage of the existing full network RMS model and reduces the data modelling effort for EMT studies. The area of interest in the network (study area/s) will be modelled and analysed in detail in EMT time domain, while the rest of the network is modelled and simulated in an RMS simulation (splitting the network by regions). The benefit of such an approach is that the overall small- and large signal behaviour of the power system is preserved which is difficult to achieve when solely relying on a reduced network model implemented on EMT.Data Quality Statement (DQS):The project will be delivered under the NIA framework in line with OFGEM, ENA and NGGT / 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 access control, 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 our suppliers own quality assurance regime. Quality assurance processes and the source of data, measurement processes 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 will be made available for review.  The overall project will be staged under three Work Packages (WP). The scope of the project includes the following:Work package 1: Develop and test Interfacing/Data exchange methods between PSCAD & PowerFactoryReview data exchange functionality in both PSCAD and PowerFactory software tools in facilitating co-simulation and communication (data exchange) with the other software.Develop custom interface models in PSCAD and PowerFactory to enable representing the rest of the network in each software. Establish and verify the data exchange mechanism between the two software platforms. The input to the source on the PSCAD side would be the instantaneous values of phase voltages (or currents). The input to the source on the PowerFactory side will be the magnitude and phase (of voltage or current).Determine and develop the mathematical methods to convert information of PowerFactory side to PSCAD and vice versa. The time varying information in RMS form, measured at the interface point (phase and magnitude) on the PowerFactory side is to be converted to instantaneous values to control the Interface source on the PSCAD side. The instantaneous values on the PSCAD side, measured at the interface point (instantaneous value of voltage or current) is to be converted to RMS quantities to control the Interface source on the PowerFactory side.Test and validate the developed “interfacing/data exchange” method in a small test model (IEEE 9 BUS or 14 Bus case is suggested). Refine the interfacing method based on tests performed on the small test system.Provide a technical report covering the developments, validation and refining of the methods under WP1.(Note that the following work packages will only commence if work package 1 is successful.)Work package 2: Validation of Co-simulation approach in a reduced networkDevelop a PowerFactory model of a reduced network of the GB system around an identified region which should have both conventional plants as well as inverter-based connections. The total number of buses in this area should be kept to a reasonable number (recommended around 50 or less). Use the developed identical system model in PSCAD and benchmark the dynamic response results.Verify the co-simulation methods developed to test the accuracy of co-simulation. Selected areas of the system will be simulated in PowerFactory and the rest in PSCAD. The co-simulation should be able to facilitate multiple interface points (i.e. not limited to radial connections).Produce technical report, summarise key findings.Work Package 3: Validate the co-simulation method in full GB modelUse a full GB model to further validate the co-simulation method: At this stage, selected areas will be represented in PSCAD while the rest of the GB network will be represented in PowerFactory.Identify any future work required for deployment / implementation and provide user guidance and training on the developed co-simulation approach if the developed co-simulation method is successful.Produce a project final report and organise dissemination events to share the key findings of the project. The key objective of the project is to develop an innovative co-simulation modelling algorithm that enables a more efficient and flexible network modelling and simulation approach. This should improve the simulation efficiency, reduce the data modelling effort for EMT modelling, and enable easier access for our customers to access dynamic simulation models without infringing IP rights.
Abstract	With the rapid penetration of power electronic (PE) devices in the system, large network wide dynamic stability simulations conventionally performed using Root Mean Square (RMS) type simulations may not capture the correct system dynamic response. Electromagnetic transient (EMT) simulation can accurately capture the changing dynamic of the network. However, it requires a significant data modelling effort and has limitations when simulating large systems. Thus, a more effective and flexible future power system modelling approach is required to meet future modelling needs. This project aims to develop an innovative co-simulation modelling approach between Digsilent PowerFactory (RMS type) and PSCAD (EMT type) which can effectively maintain the benefits to both types of mathematical platforms, reduce the data modelling effort for EMT modelling and efficiently perform reliable simulation studies.
Publications	(none)
Final Report	(none)
Added to Database	14/10/22