PSSE and PSCAD

Translate a utility-scale plant single-line diagram into explicit PSS®E model boundaries from inverter terminals through the POI.

Represent generator step-up transformers and the plant substation using project ratings, impedances, winding connections, and tap data.

Calculate an aggregate collector-system impedance from feeder-level conductor and transformer data.

Validate an aggregate collector equivalent against a detailed representation using POI voltage, active-power loss, and reactive-power loss results.

Configure inverter MBASE, active-power limits, and reactive capability from equipment ratings and capability-curve data.

Configure standalone BESS charging and discharging dispatch with consistent signs, efficiency assumptions, and operating limits.

Configure a solar-plus-BESS plant sharing one POI for a stated allocation of solar output, BESS dispatch, and POI export.

Coordinate the stated POI voltage, reactive-power, or power-factor objective with transformer taps, shunts, and reactive devices without concealing a modeling error.

Prepare an IEEE 118-bus or equivalent approved public or synthetic transmission case for planning-study practice and document its limitations.

Distinguish an N-1-1 sequence with allowable intermediate system adjustments from a simultaneous N-2 event.

Create study scenarios for project size, renewable output, BESS mode, data-center demand, system load, dispatch, and planned outages.

Configure and execute an N-1 contingency set while recording islanding, non-convergence, thermal violations, and voltage violations.

Apply the permitted redispatch, topology, tap, shunt, or operating adjustment after the first N-1-1 event.

Execute the second contingency from the adjusted post-first-event state and assess the resulting system performance.

Classify violations as pre-existing, new, or materially worsened and identify the limiting contingency sequence.

Interpret a Q–V curve and estimate reactive-power margin at a candidate POI under an identified limiting condition.

Identify the authorized SPP or transmission-owner channel, requester role, confidentiality agreement, and CEII conditions required to obtain an applicable cluster study model.

Prepare a formal model request specifying cluster cycle, study phase, year, season, scenario, file formats, revisions, contingencies, and supporting documentation.

Verify the completeness and internal consistency of a received cluster-model package before modifying it.

Reproduce the supplied reference-case solution and record unexplained differences before adding a project sensitivity.

Insert a proposed generator or large load into the cluster case using an explicit balancing and dispatch method.

Measure the sensitivity of violations to project size, output, charging mode, load level, and power factor.

Measure the sensitivity of violations to topology, outage, generation dispatch, and cluster-project assumptions.

Isolate incremental project impact using with-project, without-project, and relevant cluster-on or cluster-off comparisons.

Construct peak, reduced-load, ramp, energization, and backup-supply scenarios for a proposed data-center load.

Estimate project-size thermal headroom at each candidate site using repeated AC power-flow solutions.

Evaluate candidate-site voltage sensitivity to project size, dispatch, and power factor.

Execute a three-phase fault calculation and calculate SCR while distinguishing fault MVA from short-circuit ratio.

Rank candidate sites using transparent thermal, voltage, contingency, grid-strength, sensitivity, uncertainty, and data-quality criteria.

Reproduce the violation cited as the driver for a proposed network upgrade and classify its project causation or incremental contribution.

Test a technically credible lower-cost alternative or operating mitigation and quantify its residual violations and limitations.

Prepare a formal technical RFI or challenge package containing assumptions, case references, reproducible evidence, alternative results, and specific questions for the utility or SPP.

Distinguish a PSS®E DYR file from dynamic-data formats used by other programs, including DYD files, and identify when documented model translation is required.

Parse a DYR record into bus number, machine identifier, model name, and ordered model constants.

Trace the signal and control interfaces among renewable converter, electrical-control, plant power controller, and protection models in a complete dynamic model chain.

Compare documented REGC-family converter variants and pair a selected converter model with a compatible REEC-family electrical-control model.

Configure a documented REPC-family or OEM plant power controller for a stated POI voltage, reactive-power, power-factor, active-power, or frequency-control objective.

Interpret PPC measurement filters, deadbands, droop, PI gains, limits, remote-bus compensation, and active/reactive-priority settings from model documentation.

Connect voltage and frequency protection models such as VTGTPAT and FRQTPAT and verify their thresholds, delays, and interface points.

Validate the complete DYR model chain, parameter counts, model order, bus associations, PPC interfaces, and initial conditions against the installed model-library documentation.

Derive the network impedance for a specified SCR and X/R ratio and construct an infinite-bus MQT case at the required POI operating point.

Run a flat-run initialization test for BESS charging and discharging conditions and assess drift in voltage, frequency, active power, and reactive power.

Execute a small-voltage-disturbance test and assess PPC voltage-control, active-power, and reactive-power response against the applicable requirement.

Execute a frequency-change test and quantify PPC droop or inertia-response metrics while accounting for active-power headroom and operating limits.

Execute preferred HVRT tests at the required leading and lagging POI operating conditions, such as ±0.95 power factor where specified.

Execute the required legacy and preferred LVRT test matrix and assess ride-through, current response, PPC behavior, and post-event recovery against the governing criteria.

Perform an SCR sweep and identify the lowest tested grid strength satisfying the defined stability and fault-recovery criteria.

Emulate loss of synchronous generation in the prescribed test system and interpret the renewable plant's frequency and active-power response.

Create and compile a structured PSCAD project with reusable network, control, disturbance, and measurement sections.

Select simulation duration, EMT time step, output sampling interval, and channel settings for a stated transient test.

Build an infinite-bus Thevenin source for a specified fault level, SCR, and X/R ratio.

Represent transformer and collector-system equivalents consistently with a reference PSS®E case.

Implement timed fault logic and breaker operations for a PSCAD MQT test bench.

Implement voltage-playback and frequency-playback controls for an appropriate PSCAD source component.

Configure POI measurements and exported traces with unambiguous units, scaling, polarity, and signal names.

Import an OEM PSCAD package and identify its inverter, PPC, protection, library, compiler, licensing, and version dependencies.

Configure the OEM or explicit PSCAD PPC measurement point, control mode, setpoint, filter, droop, deadband, limits, delay, and priority settings from supplied documentation.

Initialize a specified solar, BESS-charging, or BESS-discharging operating point and verify its POI steady-state match to PSS®E.

Execute a small-voltage-disturbance test and quantify PPC voltage or reactive-power regulation from POI response traces.

Execute a frequency-change test and quantify PPC droop, synthetic-inertia, and active-power-limiting behavior.

Simulate loss of synchronous generation and evaluate the renewable plant's frequency and active-power response.

Run the required HVRT and LVRT test matrix and identify current-limit, active/reactive-priority, protection, PPC, and recovery behavior.

Execute an SCR sweep and identify weak-grid stability and fault-recovery limits.

Execute +180° and −180° phase-angle-jump tests and assess recovery against the applicable acceptance basis.

Align electrical bases, network equivalents, dispatch, SCR, X/R ratio, disturbance definitions, PPC modes, setpoints, and measurement locations between PSS®E and PSCAD cases.

Produce normalized, time-aligned PSS®E and PSCAD overlay plots with consistent axes, units, signal names, and event markers.

Calculate overshoot, settling time, steady-state error, response delay, and recovery metrics from a response trace.

Define a test-specific comparison tolerance from an applicable requirement or documented engineering rationale.

Classify and investigate a cross-platform mismatch as an initialization, network-equivalent, PPC, inverter-control, protection, measurement, or numerical issue.

Create a traceability matrix linking each applicable requirement to its source section, case, test, plot, measured metric, and conclusion.

Write a reproducible test-result package containing methods, software versions, file manifest, assumptions, plots, observations, and pass/fail conclusions.

Audit an MQT package for technical completeness, revision control, confidentiality, unsupported claims, and issues requiring utility, OEM, or senior-reviewer escalation.

Configure and test a Python environment compatible with the installed PSS®E release.

Query network objects and inventory dynamic model assignments through the PSS®E Python API.

Encapsulate case copying, modification, solution, return-code checking, and result extraction in a reusable Python function.

Automate cluster and siting sensitivities for project size, dispatch, operating mode, power factor, load, and topology.

Automate an N-1 contingency batch and extract thermal, voltage, islanding, and convergence results.

Automate a sequential N-1-1 assessment that preserves the post-first-event state and applies permitted intermediate adjustments.

Automate selected PSS®E PPC and model-quality tests and export consistently named dynamic response channels.

Export metadata-rich results and validate sampled automated results against manually executed reference cases.