Power system studies
Load flow, stability, short-circuit, and protection coordination studies for AC/DC interactions and interconnection planning.
RAV TECH ABRAV TECH ABA small, senior team of power system engineers specializing in system studies and HVDC control, protection, commissioning, and acceptance verification — brought in when the margin for error is zero and the owner needs a second set of expert eyes.
Discuss your projectIndependent, vendor-neutral support across the project lifecycle — often brought in to check the vendor's own numbers.
Load flow, stability, short-circuit, and protection coordination studies for AC/DC interactions and interconnection planning.
Control system performance, dynamic simulation, and protection scheme design review.
On-site support through energization, staged testing, and converter station commissioning.
Independent verification that the delivered system meets owner's specification before final handover.
Scripted batch simulation, parameter sweeps, and regression testing for large study campaigns.
A new HVDC scheme changes the behavior of the surrounding AC grid — voltage stability, fault levels, protection coordination, and harmonic performance all shift once the link is energized. We model those interactions before construction, so surprises get found on paper instead of on site.
Control and protection performance is usually only proven by the vendor's own dynamic simulations. We independently model and stress-test the control response and protection philosophy against disturbances, so the owner isn't taking those numbers on faith.
Energization is where design assumptions meet reality. We support staged commissioning on site — reviewing test procedures beforehand, witnessing tests as they happen, and helping troubleshoot when something doesn't behave as modeled.
Before final handover, we verify the delivered system against the owner's specification independently of the vendor — producing a record the owner's team and regulators can rely on, not a summary written by the supplier.
Large HVDC study campaigns mean running the same PSCAD case hundreds of times with small parameter changes — manually, that's slow and error-prone. We build automation scripts around PSCAD's automation library to run batch simulations, sweep parameters, and screen results without an engineer re-clicking through each case.
The same tooling is reused for regression testing control and protection logic after firmware or setting changes, so re-verification takes hours instead of weeks.