IT and UPS load
Power-electronic server, rectifier and power-supply behaviour with voltage sensitivity and recovery settings.
Large-load power-system models
Data-center interconnection modelling from the utility POI into the campus.
Represent the transmission or distribution interconnection, redundant transformer paths, medium-voltage buses, IT and cooling loads, standby generation, BESS and reactive controls in one electrical case.
- Architecture
- POI, redundant supply paths and campus buses
- Load composition
- IT, UPS, VFD, pumps and chillers
- On-site resources
- Gas generation, BESS and capacitor banks
- Submission path
- PSS/E-compatible model package
Model the campus
Large load is more than one MW value at the meter.
A useful interconnection model must explain how the facility is connected, how the load is divided, which components can provide voltage or reactive support, and how the campus behaves during grid disturbances.
HV Power Flow keeps that architecture visible and ties it to the same steady-state, sequence and dynamic records used for utility exchange.
Represent the complete project-side network
- Utility equivalent and point-of-interconnection bus
- Parallel and three-winding interconnection transformers
- Redundant 34.5 kV or other medium-voltage distribution paths
- IT, UPS, cooling, pump, chiller and auxiliary load groups
- Standby gas turbines, renewable generation and BESS
- Capacitor banks, remote voltage or power-factor controls
Data-center load behaviour
Separate the components that respond differently.
Dynamic studies become more meaningful when electronic load, rotating equipment and controls are not treated as one instantaneous step.
VFD cooling fans
Motor B-style fan behaviour or the cooling portion of a composite load representation.
Pumps
Motor C-style load behaviour for circulating and cooling-water pump systems.
Chillers and compressors
Motor A-style dynamics for compressor-driven cooling equipment where applicable.
Standby generation
Gas-turbine machine, exciter and governor characteristics for on-site generation scenarios.
BESS support
Zero-MW steady-state operation with reactive support and active-power response during dynamic events.
Event-driven studies
Test faults, switching and ride-through response.
Build a timed event table with bus or equipment faults, switching actions, and source voltage or frequency disturbances. Measure voltage, frequency, MW and MVAr at another bus or item while the model advances through the event sequence.
Typical questions
- Does the IT load remain connected through the voltage dip?
- How quickly do electronic loads and motors recover?
- Does BESS or capacitor support reduce the POI disturbance?
- Do controls create oscillation, delay or post-fault overshoot?
Large-jurisdiction workflow
Organize the model data expected in PSS/E-based review.
Regions such as ERCOT publish specific processes and modelling resources for large loads. HV Power Flow helps a project team assemble the network, load composition, sequence values and dynamic records before licensed study validation.
| Model package area | Project data to prepare | HV Power Flow output |
|---|---|---|
| Steady state | POI topology, transformer and line impedances, load blocks, generation and controls | PSS/E-compatible RAW network case |
| Sequence data | Utility strength, line and transformer sequence values, machine grounding and motor contribution | Sequence-data companion and completeness checks |
| Dynamic data | Load composition, ride-through, generator, BESS and plant-control parameters | Supported DYR records and ordered parameter review |
| Diagram | Terminal relationships, voltage levels, redundant paths and equipment identification | Saved app SLD and PSS/E SLD Builder workflow |
| Validation | Target PSS/E version, official base case and utility study assumptions | Readiness report and PSS/E validation runner |
HV Power Flow is not affiliated with or approved by ERCOT. Current ERCOT, transmission-provider, distribution-provider and utility requirements remain controlling.
Utility exchange
Keep the model portable.
Export the data-center network to PSS/E RAW revision 34 or 35, include supported dynamic and sequence records, and give the reviewer the model architecture rather than only a spreadsheet or diagram.
Before submission
Replace preliminary values with utility and manufacturer data, confirm the current study guide, and read the package back in the utility's target PSS/E environment. A qualified professional remains responsible for the engineering and submission.
Build the data-center electrical case from the POI inward.
Model the campus architecture, study its response and prepare the PSS/E exchange package in one workspace.