Key benefits:
- Risk mitigation of critical points
- Security of supply for the most critical parts of the grid
- Of-the-shelf fast recovery of the power supply
The customer - Elia
The customer is a leading European electricity transmission system operator. They strive to ensure a reliable and uninterrupted supply of electricity in their high-voltage grid serving to over 30 million end users. They own and operate close to 20,000 kilometres of high-voltage transmission grid, including HVAC and HVDC converter stations and interconnectors. Many wind farms, onshore and offshore feed directly into their grid. The grid belongs to the top of reliable grids in the world.
The challenge
Elia has performed a risk assessment of its grid and identified a number of the most critical parts in the grid. In order to mitigate risk, they want to have an emergency restoration system at hand and pre-engineered work for these sites. This emergency restoration system consists of modular towers used to quickly restore power on damaged power transmission lines. Purpose is to speed up the power supply restoration after an accident has affected the grid.
DNV’s contribution
DNV has been asked to design the routes for the emergency lines using its dedicated software tool KELSOP. All sites should be engineered and mapped in such a way that all materials and instructions are ‘off-the-shelf’ available in case an event takes place. The system needs to be completely engineered according to international standards, including all civil aspects for the towers and environmental conditions of the area. Based on the engineering outcomes, DNV will compose optimal sets of towers and auxiliary equipment to do the job whenever it is required.
Benefits for the client
The client has off-the-shelf solutions and optimal sets of emergency restoration systems at its disposal and is able to speed up power supply restoration.
| Installation of the insulator assembly | Installation of the insulator assembly |
| Finalizing the installation of the insulator assembly | Installation of guy wires in anchor |
| Proof load testing of the guy wire anchors |