Meet us at CIRED 2021

Cableizer is participating at the CIRED 2021 conference in Geneva, Switzerland, on 20 - 23 September 2021, where Damian Aegerter will present two papers.

Posted 2021-02-15
Categories: Conference

CIRED is the leading forum for the European electricity distribution community. This years venue is taking place in Geneve, Switzerland on 20 – 23 September 2021. See their COVID-19 update for the latest information.

Damian Aegerter from Braavos GmbH will be participating as a representative of Cableizer and would be glad to meet you in Geneva. He will be presenting two papers with one of them showing the capabilities of Cableizer:

Influence of bonding of medium and high voltage cables on annual costs

The ohmic losses in the screen and sheath of modern medium and high voltage cables depend on the bonding method. Solid bonding has higher losses resulting in lost profit which accumulate over the operational life of the cable system. Special bonding methods such as single-side bonding have lower losses but higher investment costs and require inspection. The net present value method can be used to determine the total costs for a cable system. The break even point depends on the length of the system and the average load.

Calculations done with example cable systems showed that solid bonding is almost always recommendable for medium voltage cables because it improves the grounding system and is safer while the additional losses when compared with single-side bonding are small. Solid bonding of high voltage cables, however, leads to significantly higher losses and results in large costs over the lifetime. For short lengths, however, e.g. within substations, solid bonding can be more economical.

The second paper gives some insides into the consultancy work of Braavos GmbH:

Results of Blackout- and Blackstart-Tests of 1 kV Supply for the New Swiss Railway Tunnel Eppenberg

The new 3.1 km long Swiss railway tunnel Eppenberg between Olten and Aarau went into operation on December 13, 2020 after a construction period of around 6 years.

As part of the commission tests, full blackout and re-energization tests were executed. A blackout test of a railway tunnel has never been carried out at SBB and research found no such tests carried out by other European railway operators. Our approach was to consider the tunnel as a large building spread out over a large area and use the recommendations for whole building shutdown tests, specially the German Standard VDI 6010, as a guideline.