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| Reference Number | NIA2_NGET0062 | |
| Title | Compact Substation (CoSub) | |
| 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 Electricity Transmission |
|
| Award Type | Network Innovation Allowance | |
| Funding Source | Ofgem | |
| Start Date | 01 May 2024 | |
| End Date | 31 March 2026 | |
| Duration | ENA months | |
| Total Grant Value | £478,128 | |
| 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 Electricity Transmission (0.000%) |
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| Web Site | https://smarter.energynetworks.org/projects/NIA2_NGET0062 |
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| Objectives | This study is broken down into different phases and milestones. To achieve a full design and equipment specification for the proposed compact AIS bay, we will work with National Grid engineers (innovation, assets and maintenance) along with a key contractor to ensure that both installation and maintenance key aspects are considered.The following work Tasks will be addressed in the project:Revisit and verify compaction principles including assessing previous proposals.Review and explore new innovative developments in compact substation equipment.Use surge arresters to explore optimised overvoltage protection.Review and investigate relevant aspects of safety and maintenance implications.Identify site for installation.Finalise a design for consideration, discussion and feedback from NGET and contractor/s.Identify suppliers of equipment and discuss suitability for compact substation design.Prepare installation requirements with contractor/s.Finalise design and equipment selection and forward plan. This is a research project to understand the carbon footprint of AIS substation. Over the 21-month project with Cardiff University, we will perform different tasks with the help of research institute, the internal NGET experts, and manufacturers in the field. This proposal addresses the application of new compact solutions in substation design with the aim of reducing the footprint of 400kV air insulated substations (AIS). A 400kV compact substation design will be proposed by adopting a lower IEC Basic Insulation Level and Switching Impulse Level, and consequently reduced clearances, taking advantage of modern overvoltage protective devices. A new configuration will be proposed with the adoption of minimum clearance and alternative geometric arrangement of the busbar. Furthermore, manufacturers like Siemens/GE will be engaged in research to develop integrated high voltage plant and to use non-conventional instrument transformers (e.g. using fiber-optic transducers). The introduction of innovative high voltage equipment permits a further significant footprint reduction.The overall area occupied by an air insulated substation is a function of the number of incoming lines to the substation and of the layout adopted (e.g. double busbar). In this proposal, the area required by a single switch bay is selected as a parameter for comparison of different possible designs to assess the overall space reduction using compact AIS solutions for 400kV substations. A preliminary evaluation on the percentage space saving achieved with some of the illustrated compact solutions is also presented. At the end of the project, we intend to redesign the substation bay with reduced emissions meeting the technical and regulatory standards/targets. Key findings across all deliverables will be presented in a workshop with NGET staff. This project will help us in optimizing the AIS substation with the following objectives:Develop an understanding of standard air clearances for transmission voltages and associated empirical expressions.Explore recent developments in compaction techniques and voltage uprating.Revisit the concepts suggested in the previous report with the aim to optimise the overvoltage protection and the air clearances.Ensure as a business we are adequately addressing environmental impacts of our AIS substation designs whilst enabling the transition to Net Zero.Create a design implementation roadmap capable of minimising electricity Transmission substations lifecycle carbon.Reduce emissions through a review of current design and best practice options.Increase circularity in design of substations through the creation of an opportunities register and roadmap | |
| Abstract | Conventional 400kV air insulated substations (AIS) require a significant footprint to accommodate the double busbar arrangement with its associated main and reserve busbars, disconnectors, circuit breakers and metering apparatus. This project will explore compact substation designs by introducing surge arrester overvoltage protection to reduce the surge magnitudes and adoption of the innovative transformers with embedded close overvoltage protection, disconnector circuit breakers and optical voltage and current measurements. Moreover, Delta and Vertical busbar configurations (DBC and VBC) will also be explored to reduce the footprint width of the busbars. Project will result in taking this work to the next TRL stage, design and prepare a plan for a full demonstrator compact substation bay, including geometry and new equipment selection. | |
| Data | No related datasets |
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| Projects | No related projects |
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| Publications | No related publications |
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| Added to Database | 02/10/24 | |
