Lifetime extension - WG 2020-1



Electrical equipment constitute a considerable economic asset value for the DSOs. Many network equipment in distribution networks have long intrinsic lifetimes, most of which exceed 40 years.

However, some components of equipment age faster than others, or become obsolete due to the evolution of the technologies used and induce premature replacement of the complete equipment. Environmental or safety requirements may also be imposed and make the compliance of certain equipment incompatible with the new regulations. The development of smart grids necessary to achieve the energy transition objectives can also lead to functional requirements that certain legacy generations electrical energy distribution assets do not meet.

It is crucial for the economic performance of network operators to make optimal use of the equipment over time. Faced with the constraints mentioned above, solutions for extending the life of equipment and/or modifying/upgrading critical parts and/or implementing monitoring can prove effective in many cases, compared to a complete renewal of equipment. In addition, today's technologies such as ioT, big data and AI offer new possibilities to optimize the lifespan of equipment. 


The scope proposed for the working group is to identify:

  • life extension solutions alternative to the renewal of equipment
  • lesson learned, good practices of lifetime extension options for electrical equipment
  • obstacles and/or limitations of electrical equipment life extension strategies.

The proposed approach would consist of :
  • set out the main criteria or constraints that would lead to renewing the equipment,
  • identify possible efficient life extension strategies, 
  • compare these strategies to the renewal of the equipment concerned

As the scope of application of the approach can prove to be very broad, it is suggested to focus within the framework of this work on power equipment for substations and networks, including for example:
  • primary substation power equipment,
  • medium voltage lines and cables,
  • automation, sensoring and protection assets associated with MV networks

Conveners :

Bertling Tjernberg Lina, KTH Royal Institute of Technology, Sweden
Uhrig Stephanie, University of Applied Science Munich, Germany

Members :

Ali Ahmed Salwa, Egyptian Electricity Holding Company, Egypt
Alvarez Marie-Cécile, Grenoble INP, France
Anglhuber Martin, OMICRON electronics GmbH, Austria
Babizki Alexei, Maschinenfabrik Reinhausen GmbH, Germany
Calvo Cuadra Nuria, Arteche, Spain
Cselko Richard, Budapest University of Technology and Economics, Hungary
Dürr Manuel, Vorarlberger Energienetze GmbH, Austria
Elfark Gehan M. Oma, Canal Company for Electricity Distribution, Egypt
Farago Ferenc, Hungarian Energy and Public Utility Regulatory Authority, Hungary
Freitas Miguel, EDP Distribuição, Portugal
Gemme Carlo, ABB, Italy
Hyun Seung Yoon, KEPCO Research Institute, Korea
Langlet Guillaume, Enedis, France
Lenz Lukas, Stromnetz Hamburg, Germany
Petrovič Nejc, Elektro Gorenjska, Slovenia
Pinto Olivier, Nexans, France
Saers Robert, Hitachi ABB Power Grids, Sweden
Sherbilla Nader, Fathy Fathalla Beheira Company for Electricity Distribution, Egypt
Thäsler Frank Ormazabal Spain
Trichon François, Schneider Electric, France
Wang Yu, Guangdong Electric Power Research Institute, China
Yang AiJun, Xi'an Jiaotong University, China

Click here to download the final report (ISSN 2684-1088)