Measured evidence and planner-ready models, in one workspace.
Nyquist ingests disturbance records from the equipment you already own, fits dynamic models to how your facility actually behaves, verifies them against every event, and issues the evidence your planner, utility and regional entity ask for.
Works with every OEM. Nothing to rip and replace.
We are hardware agnostic by design. Nyquist reads the files and streams your recording equipment already produces, whoever made it.
- Disturbance and fault records in IEEE C37.111 COMTRADE (1999 and 2013, ASCII and binary)
- Sequence of events and continuous dynamic disturbance data
- Plant historians and power quality meter exports in CSV
- UPS and BMS event logs for transfer and lockout behavior
- On-site connector that watches a folder or historian and sends records outbound only
Models fitted to measured behavior, not the spec sheet.
We fit standard dynamic load structures to what the facility actually did, including the transfer, lockout and recovery behavior design data misses, and report how well each one matches.
- Standard structures including PERC1, composite load (CMLD) and electronic load representations
- Real and reactive power fitted against measured response
- Fidelity report with error against every recorded event
- Pre-energization models from OEM data and questionnaires, replaced by measured fits after energization
Delivered in the formats planners already use.
Siemens PSS/E
Dynamic records (.dyr) with an apply script, plus load and shunt records for the power flow case.
GE PSLF
Dynamic data (.dyd) records with electronic load values for planners who require them.
DIgSILENT PowerFactory
Script that writes load, shunt and model parameters directly into the project.
Neutral model JSON and playback CSV are included with every export, along with a README and fidelity table. Product names belong to their owners; Nyquist is not affiliated with any software or equipment vendor.
A compliance workspace built around the CLO requirements.
Model verification
Documentation that the model on file represents the facility as built, backed by measured events instead of assertions.
Change tracking
A change log for hardware, software, firmware and settings that tracks reverification windows and data resubmissions.
Recorder compliance
A register of recording devices checked against CLO-003 sampling, time sync and retention requirements, with data request clocks.
Ride-through checks
Measured behavior checked against voltage and frequency ride-through envelopes, reclose sequences, ramp rates and oscillation limits.
Evidence packages
Versioned, tamper-evident packages issued to your planner, with a transmittal log you can show an auditor.
Flexibility verification
Baselines and event performance reports for curtailment, from the same measured record.
Built for operators who do not hand out their data.
- You own the record. Data rights are agreed before installation.
- Only the model leaves the fence unless you choose to share more.
- Role based access per site with owner, editor and viewer roles.
- Full audit trail of every upload, analysis and issued document.
- REST API with scoped keys for your own systems.
- A dynamic model of the facility, fitted to measured behavior
- Verification documentation for your planner and regional entity
- Supporting records maintained on your behalf
- Comparative context against similar facilities, anonymized
See the platform on a site like yours.
We are onboarding a small number of founding sites for 2026 and 2027. In a 30 minute demo we walk through the platform, your obligations, and what a 90 day engagement at your site would produce.