SPIE modernizes the Altheim transformer station on behalf of TenneT

An essential link in the electricity supply infrastructure in Bavaria, this transformer station was designed for long-term operation with a voltage level of 380 kV. Following a call for tenders, the project started in March 2015 and has since been successfully completed.

An extension for better performance

To increase efficiency and meet the requirements of the future north-south power line, modernization of the transformer substation was necessary. SPIE carried out this work without disrupting the electricity supply, in order to ensure continuity of service for the households and businesses served by this network. "By its scope and its requirements, this contract was very ambitious", underlines Karl Olwitz, project manager at SPIE and responsible for the execution of the contract. As prime contractor, the multi-technical service provider was responsible for carrying out the project from A to Z, from the planning to the installation of the 380 kV substation, including the supply of materials, and this , for a period of five years. “In order to improve the efficiency of the transformer substation, we dismantled the existing 220 kV installation in sections, temporary devices ensuring continuity of service,” explains Karl Olwitz. The transformer station was then reassembled in stages. To do this, SPIE planned, constructed and installed four fields of 380 kV conductors, two fields of 380 kV transformers and three fields of 110 kV transformers, a 380 kV compensation system and more than 18 bar fields. triple buses. In addition, the multi-technical service provider has installed a full set of on-site protection, control and communication technologies; he also erected the new post building and 11 control cells, and equipped the entire site with a new exterior lighting system. “The reconstruction of a transformer substation of this size requires precise planning and careful coordination of the various trades. The Altheim transformer station is considered an important node in the integrated European electricity grid system and constitutes an essential power supply interface between Thuringia, eastern Bavaria, greater Munich and as far away as Austria ”, explains Anton Pritscher, site manager of the switchgear unit at Ergolding.

A long-standing reliable partner

TenneT and SPIE have enjoyed a fruitful collaboration for many years. As a multi-manufacturer and multi-product service provider, SPIE sets itself apart by offering a single source of services, coupled with operational excellence. SPIE has established a trusted partnership with the electricity transmission network operator by supporting it in its energy transition with tailor-made solutions.

The effective cooperation between the two companies has enabled them to successfully complete many projects in the past. “We are very proud of the confidence TenneT has once again placed in us with this contract. Taking on the role of prime contractor was a particular challenge for SPIE, specifies Josef Ammer, works manager at SPIE and responsible for operational sequences on site. Thanks to our quality of execution, strict adherence to the schedule and the application of high standards of safety at work, we were once again able to submit a convincing bid in this European tender. "