Swissgrid boosts efficiency using 3D power grid model

Swissgrid AG is the national grid operator responsible for planning, dismantling and replacing Switzerland’s entire transmission grid infrastructure.

The power network comprises 380 kV and 220 kV lines that are owned by Swissgrid. The lines extend for 6,700 kilometres, with 12,000 pylons and 125 substations.

Demands on the grid

In recent decades the demands on the grid have changed, with the introduction of new energy sources and power plants, as well as growth in Switzerland’s electricity consumption. The country is also an important electricity hub for Europe, because of its central location and topography.  

Swissgrid needed an accurate 3D model of the network, to help it manage the maintenance and targeted development of the transmission system so that Switzerland would continue to have a secure electricity supply in the years to come.  

Unlocking insights from Geo-data

We acquired lidar data and imagery for the entire transmission network – a first for Switzerland – and provided intelligent Geo-data for use in conduction modelling, condition analyses and grid simulations. Our data will be used to provide obligatory environmental and disclosure requirements while also ensuring the safe operation of the network. 

Powerline survey

Our latest-generation FLI-MAP NG helicopter-lidar system was deployed to acquire lidar and image data for the entire high-voltage grid (380 kV / 220 kV) and its surroundings.  

We processed the resulting data and above-ground objects in the lidar point cloud using automated cloud processing algorithms; classifying them in accordance with Swissgrid’s technical specifications. This also included completing a PLS-CADD model of the high-voltage grid and the crossing or parallel third-party lines.  

PLS-CADD software was also used to apply clearance calculations to all objects, ground and vegetation within the corridor – this enabled Swissgrid to simulate a broad variety of environmental and line operating conditions, and to detect problems.

Project challenges

The mountainous Swiss terrain and demanding specifications made for a challenging operation. We acquired the data in stages and flew across the entire network within the 18-month project time frame. 

Processing the data and modelling the lines revealed many unexpected situations, including incomplete conductor information and difficult tower and cable configurations. However, we maintained clear, intensive, two-way communication with Swissgrid throughout and all issues were resolved. The result was a complete and up-to-date register of Swissgrid's power lines and their surroundings.