Elys’ expertise: High Voltage substations

With a view to optimising the renewable project grid connection, Elys relies on an in-house technical team that completes the design, construction and commissioning of HV substations. With expertise in the construction of some twenty high-voltage substations across Europe, Elys ensures the overall management of the design and implementation of greenfield projects, from the electricity generation unit to the grid point of connection.

Our services In-house design office

High Voltage substations key figures

24 HV substations commissioned

31 Installed HV transformers

4 Installed reactive power compensation features

4 HV substations detailed design /year

30 Meetings with transport grid operator /year

6 Building licences

prepared and obtained

Sample references: High Voltage substations

Elys actively prepared and managed the construction of more than High Voltage substations in Europe.

Briastre: 50 MVA – 20 / 63 kV High Voltage private substation

Scope: Owner's Engineer for design and construction.
Location: France, Nord.

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Cressy-Omencourt: 120 MVA – 33 / 225 kV High voltage private substation (2 60 MVA transformers)

Scope: Owner's Engineer for design and construction.
Location: France, Aisne.

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Proville: 50 MVA – 33 / 90 kV High Voltage private substation

Scope: Owner's Engineer for design and construction.
Location: France, Nord.

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Bouin-Plumoison: 50 MVA – 33 / 90 kV High Voltage private substation

Scope: Owner Engineer for design and construction.
Location: France, Pas-de-Calais.

Tulipe: 80 MVA – 33 / 225 kV High Voltage private substation

Scope: Owner's Engineer for design and construction.
Location: France, Somme.

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Muniesa Promotores: 513 MVA – 220 / 400 kV shared High Voltage private substation

Scope: Technical Advisor.
Location: Spain, Province of Teruel.

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Le Transloy: 80 MVA – 33 / 225 kV private High Voltage substation

Scope: Owner's Engineer.
Location : France, Pas-de-Calais.

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Morchies: 120 MVA – 33 / 225 kV private High Voltage substation, connected to TSO (RTE) switching station

Scope: Owner's Engineer.
Location: France, Pas-de-Calais.

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Laveyrune: 150 MVA – 33 / 225 kV private High Voltage substation , connected to TSO (RTE) switching station

Scope: Owner's Engineer (Design and construction).
Location: France, Ardèche.

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Our other expertise

Wind power

Solar PV

Battery storage

Electrical engineering

Hydropower

Briastre: 50 MVA – 20 / 63 kV High Voltage private substation

Client: Boralex
Scope: Owner’s Engineer for design and construction:

Employer’s Requirements review,
Tender management,
Contractors offers negotiation,
Technical documentation approval (during detail design and construction phases),
Construction management.

Date: January 2017 – November 2017
Location: France, Nord.

Cressy-Omencourt: 120 MVA – 33 / 225 kV High voltage private substation (2 60 MVA transformers)

Client: ENR Grid
Scope: Owner’s Engineer for design and construction:

Shared substation,
Electrical design for the substation and wind farms integration:
- Load flow,
- Short circuit study,
- Neutral earthing design,
- Grounding system design,
- Main components design: power transformers, Medium Voltage and High Voltage equipments,
- Design of wind farm Medium Voltage cabling,
Project preparation, Contractors tendering (Civil Works, EPC and transformers),
Construction and commissioning management,
Completion of the specific data collection sheets for TSO (Fiches RTE).

Date: 2019 – 2020.
Location: France, Somme.

Proville: 50 MVA – 33 / 90 kV High Voltage private substation

Client: Boralex
Scope: Owner Engineering:

Employer’s Requirement review and approval,
Support during tendering phase,
Support for negotiation with potential contractors,
Pre-design and fianl design approval,
Management of the construction, including the substation contractor and other stakeholders.

Date: November 2018 – December 2019.
Location: France, Nord.

Bouin-Plumoison: 50 MVA – 33 / 90 kV High Voltage private substation

Tulipe: 80 MVA – 33 / 225 kV High Voltage private substation

Client: H2Air
Scope: Owner’s Engineer for design and construction:

Substation layout design in close collaboration with TSO (RTE),
Building permit submission,
Substation HV/MW/LV design and wind farms integration:
- Load flow,
- Short circuit study,
- Neutral study,
- Earthing system design,
- Main components design: Power transformers, MV and HV components,
- Support for windfarm MV network design,

Date: 2019
Location: France, Somme

Project preparation, tendering management for Civil Works, Electrical Works and Power transformer purchase,
Construction and commissioning management,
Operating and conduct agreement testing with TSO (RTE).

Date: 2019.
Location: France, Somme.

Muniesa Promotores: 513 MVA – 220 / 400 kV shared High Voltage private substation

Client: Mirova/Engie/Forestalia
Scope: Technical Advisor :

Technical support during Due Diligence phase,
Construction and commissioning supervision,
Technical and contractual management of shared electrical infrastructures between the different substation shareholders.

Date: 2020-2021
Location: Spain, Province of Teruel

Le Transloy: 80 MVA – 33 / 225 kV private High Voltage substation

Client: Boralex
Scope: Owner’s Engineer:

Support for EPC tendering,
Construction and commissioning management,
Support for transformer, Medium Votlage components and control system FAT,
Review and approval of complete electrical design and studies.

Date: 2018
Location: France, Pas-de-Calais

Morchies: 120 MVA – 33 / 225 kV private High Voltage substation, connected to TSO (RTE) switching station

Client: EnergieTEAM & Volkswind
Scope: Owner’s Engineer:

Private substation layout design in close collaboration with TSO (RTE),
2 private substation building license submission,
Electrical design of the substation and windfarm integration:
- Load flow,
- Short circuit study,
- Neutral study,
- Earthing system design,
- Main components design: Power transformers, MV and HV components,
- Support for windfarm MV network design,
Project preparation, tendering management for Civil Works, Electrical Works and Power transformer purchase,
Construction and commissioning management,
Operating and conduct agreement testing with TSO (RTE).

Date: 2019 – 2020
Location: France, Pas-de-Calais

Laveyrune: 150 MVA – 33 / 225 kV private High Voltage substation , connected to TSO (RTE) switching station

Client :EDF Renewable.
Scope: Owner’s Engineer (design and construction):

Construction management,
Review and approval of contractor detail engineering,
Support for commissoning.

Date: 2015 – 2017
Location: France, Ardèche