Offshore and onshore converter platforms
Completions software for converter stations where commissioning is a multi-year documentation scope.
HVDC converter stations carry valve halls, cooling systems, control and protection, harmonic filters and auxiliary plant, tested in a sequence that runs for years. Deskely keeps every subsystem, FAT, SAT and system test under one register the TSO can audit.
- Duration
- Multi-year commissioning
- Core systems
- Valve hall, cooling, C&P
- Evidence
- FAT, SAT, system tests
- Audience
- TSO and owner's engineer
Choose your project type
The problem
The testing sequence is long, layered and impossible to hold in a spreadsheet.
Converter commissioning runs from component FAT through subsystem SAT to station-level and end-to-end system tests, with the supplier, the owner and the transmission operator each holding a stake in every stage.
Each stage depends on the one below, and each is proven by a different document set. A spreadsheet can hold the plan; it cannot enforce the dependency or prove what was signed.
Deskely makes the dependency structural: the station-level test cannot be certified while a subsystem beneath it has unsigned records or open blocking punch.
Setting up the register
Valve hall, cooling, filters and control are separate completion paths.
Deskely models the station as subsystems that reach completion independently: valve hall and valve cooling, DC yard, transformers, harmonic filters, control and protection cubicles, auxiliary power, HVAC and fire protection.
Single line diagrams, cubicle schedules and loop lists are parsed into the register so every cubicle, loop and cooling circuit has its drawing reference behind it.
That breakdown lets auxiliaries and cooling be commissioned and proven while the DC scope is still under test.
Test sequence
FAT, SAT and system test form a ladder, and each rung is evidenced.
A converter station is accepted in stages, and each stage has a formal evidence set. Deskely holds the supplier's factory tests against the equipment, the site tests against the subsystem, and the system tests against the station.
The certificate at each level lists what permitted it, so the transmission operator's review is a read rather than a reconstruction.
Deviations and concessions carry an owner and stay visible instead of being absorbed into a covering letter.
Handover
The station is operated by someone who was not there when it was tested.
Converter stations outlive their projects by decades, and the operating organisation inherits an evidence base it will consult for the life of the asset.
Because the dossier is assembled continuously, transfer is an export: certificates, signed records, settings versions, punch position and preservation history, per subsystem.
Every signature keeps a name, role and timestamp, which is what makes the pack defensible years later.
Control and protection settings
An HVDC scheme is defined by its parameter set, so setting management is a completions record set in its own right.
A converter station runs on thousands of settings: valve control parameters, protection relay setting sheets, sequence-of-event configuration, tap changer and reactive control limits, and the interface parameters agreed with the transmission operator at each end of the link.
Those settings change repeatedly through staged commissioning, and each change has to be issued, applied, verified against the as-applied device and signed — otherwise the trial run is proven against a configuration nobody can reconstruct afterwards.
Deskely tracks setting sheets as controlled records against the device tag, with revision, applied-by, verified-by and the trial they support, so the bipole trial evidence and the configuration it was run on stay attached to each other for the life of the asset.
How it runs
From cubicle FAT to an end-to-end system test.
Converter scopes need structure that survives multi-year schedules and supplier changes. The register has to outlast the people who set it up.
- 01
Break the station into subsystems
Valve hall, cooling, DC yard, transformers, filters, C&P, auxiliaries, HVAC and fire protection.
- 02
Parse the drawing set
SLDs, cubicle schedules and loop lists drafted into a reviewed tag register with source references.
- 03
Hold FAT against equipment
Supplier factory tests filed under the tag they qualify and required by the certificate above.
- 04
Sign SAT in the field
Site acceptance and loop testing completed on tablet against the subsystem, online or offline.
- 05
Gate system tests
Station and end-to-end tests blocked while any subsystem beneath them is unsigned or carries Category A punch.
- 06
Export for the TSO
Per-subsystem dossiers with certificates, records, settings and punch, ready for transmission operator review.
FAQ
Questions about HVDC converter stations scopes.
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