Data centre operator
225 kV GIS substation
Design review and review of the studies (VISA). We found deviations on the voltage transformers and on trip circuit redundancy.
References
Recent assignments
Clients are anonymised. They are operators, general contractors, developers, integrators and manufacturers.
01Data centres
General contractor
Protection plan, 240 MVA data centre
Selection of protection functions, current transformer sizing, settings, follow-up of testing through to commissioning.
Data centre, Île-de-France
225 / 20 kV substation
Review of the drawings for the entire substation package against the client's requirements, with the list of major deviations.
Data centre, Île-de-France
Load flow campaign on an ETAP model
Audit of the existing scenarios and sweep of upstream voltage × configurations. The on-load tap changer range of the 225 kV transformers proved insufficient.
Data centre campus
Earthing systems
Earth grid, step and touch voltages, earth potential rise, compatibility with telecom networks.
02BESS, battery energy storage
Storage developer
HV / MV substation for a battery storage plant
Transformers, switchgear, cables, protection and earthing. Preparation of tender documents and follow-up through to construction.
39 MW storage plant
Audit of a 33 kV single-line diagram
Review of the integrator's diagram and list of corrections to request, for the project owner.
Storage plant connected at 225 kV
EMT study method in PowerFactory
Grid-following and grid-forming inverter models, study cases defined according to CIGRE publications.
03Renewable energy
Power producer, PV plant
Harmonic study on an industrial MV ring
Distortion levels across several scenarios, resonance risk and transformer derating.
Integrator, West Africa
Four PV plants
Load flow, short-circuit, neutral earthing, earthing, stability and protection plan for each plant.
Integrator, West Africa
9 MWp, 30 kV PV plant
LV, MV and DC arc flash: incident energies and PPE per work location.
04Industry
Heavy industry
Electrical installation audit
Condition of substations and protection, identified risks and costed recommendations, ranked by priority.
Industrial site
Protection coordination and relay verification
MV protection coordination and on-site check of the settings.
63 and 225 kV substations
Protection relay testing
Differential protection and on-load tap changers. Testing carried out with Volt Expertise.
05Expert assessment
Wind farm owner
Dispute over an MV cable network
Technical notes on cable joint failures and switching overvoltages, responses to the opposing party's submissions (dires).
Generating substation
Capacitor bank
Analysis of SCADA logs, identification of control hunting and projection of circuit-breaker wear.