01 Core practice

Power systems consultancy for studies that don't fit a template.

Velon supports TSOs, DNOs, developers, OEMs and manufacturers with PSCAD-based EMT studies, RMS analysis, grid-code compliance, model validation and technical evidence for converter-dominated networks.

PSCAD / EMTDCDIgSILENT PowerFactoryPSS®EPythonIBR · HVDC · BESSGrid Code
What we study

The studies we specialise in.

Select a practice to see the engineering question it answers and the result we deliver. Toggle each figure to compare the as-found case against the validated fix.

Where phasor tools stop being trustworthy.

Electromagnetic-transient models for IBR interaction, control-loop instability and sub-synchronous oscillation.

EMT simulation · sub-synchronous mode · control-loop instability
EMT captures the growing oscillation phasor-domain tools miss — and proves the control fix damps it.
Grid-forming & grid-following converters
MMC-HVDC & classic LCC topologies
Sub-synchronous oscillation screening
Hybrid EMT / phasor co-simulation
Encrypted & black-box model handling
Bespoke user-defined components

Evidence packages that pass first time.

Compliance studies and EMT evidence against the UK Grid Code — the connection requirements that actually apply to your plant.

Fault ride-through · LVRT envelope · voltage dip · 140 ms
We demonstrate the plant rides through the dip and stays above the grid-code boundary — and flag the marginal cases.
ENA G99 / G98 (UK distribution)
National-grid connection requirements
ENTSO-E NC RfG & NC HVDC (Europe)
GCC codes · DEWA · TRANSCO · SEC
Fault ride-through (FRT) demonstration
Reactive capability & voltage control

Protect the asset and the connection.

Connection and integration studies for offshore wind, large-scale solar, BESS and HVDC interconnectors.

Harmonic impedance · resonance scan · parallel resonance × control
We locate the resonance that crosses the converter control bandwidth — then prove the damping filter suppresses it.
Harmonic & resonance scans
Short-circuit ratio (SCR) screening
Control interaction studies
HVDC point-to-point & multi-terminal
Black-start & islanding
Commissioning support & site witness

When IBR rewrites fault behaviour.

Settings, coordination and selectivity for networks where IBR dominance is changing fault current faster than the relay manuals.

Time-current coordination · IBR-limited fault current
As IBR cuts fault current, the operating point slides left — we re-grade settings so main and backup stay selective.
Differential, distance, overcurrent
Settings calc & PSCAD / ATP validation
Selectivity & mis-operation reviews
IBR-dominated fault current analysis
Who we work with

Built for the hard problems.

TSOTransmission operators
DNODistribution operators
OEMManufacturers
DevDevelopers · IPPs
ENA G99 / G98 ENTSO-E NC RfG NC HVDC IEEE 2800 IEC 61400-27 DEWA · TRANSCO · SEC IEEE / IEC harmonics
Beyond the report

When the study repeats, we turn it into a workflow.

Many teams lose time to repeated case setup, spreadsheet result-checking, manual plot extraction and disconnected model versions. Velon can convert repeatable study logic into Python automation, dashboards, model-QA tools and AI-assisted review — with engineers in control of final judgement.

Manual workflow
  • Repeated data entry
  • Disconnected files & versions
  • Manual case setup
  • Slow result review
  • Spreadsheet-driven evidence
  • Version uncertainty
Velon automated workflow
  • Batch scenario generation
  • Automated result extraction
  • Model QA & validation checks
  • Evidence-pack assembly
  • Traceable decision log
  • Engineer review checkpoint

Send the study scope. We'll send a response.

One paragraph is enough to start. We'll come back within two working days.

Brief us
Direct
Skip the form — email the team directly.
consulting@velonenergy.com