Grid Code Compliance Testing

Our Services

We validate performance from AVR and governor response to full-plant behavior, ensuring every test meets regulator-accepted standards.
Compliance Testing

Field-proven methods for power plants.

Grid Code Engineering provides specialized field testing services to demonstrate grid code compliance and operational readiness for power plants of all technologies and scales. Our services span from generator-level AVR and governor testing to full-plant performance, ride-through, and model validation. Every campaign is conducted independently, with calibrated instrumentation and regulator-accepted methodologies, and delivers audit-ready reports that withstand scrutiny from operators, OEMs, and authorities.
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Generator Testing

We conduct comprehensive tests to evaluate the dynamic and steady-state performance of generating units, in line with international and national grid codes:
  • AVR (Voltage Regulation) — step responses, setpoint changes, excitation stability, voltage support capability.
  • Governor (Frequency Regulation) — frequency response, droop settings, primary reserve behavior, ramping, load-following.
  • Ride-Through Capability — generator response during voltage dips/surges (LVRT, HVRT) and frequency excursions.
  • Reactive Capability — delivery and absorption across the P–Q diagram, including under stressed network conditions.
  • Telemetry Verification — SCADA and real-time data cross-checks against regulator requirements.

Plant Performance

Testing at the overall plant level validates not only unit compliance but also coordinated performance across multiple generators:
  • Heat-rate and efficiency curves across load ranges.
  • Reactive power support and plant-level power factor control.
  • Ramping and load-following under operator requests.
  • Black-start and restoration capability where required.
  • Coordinated testing of multiple units in combined-cycle or engine-based plants.

Generator Condition Assessment

Independent technical advisory delivering in-depth evaluation of generator electrical, mechanical, and control systems to support compliance, diagnostics, and long-term power plant reliability.
  • Stator & Core Diagnostics
  • Rotor & Bearing Evaluation
  • Excitation System Tuning
  • Auxiliary & Cooling Systems
  • Generator Specialists

Model Validation

Grid code compliance requires not only field results but also validated dynamic models. We connect high-resolution field measurements (≤10 ms) with industry-standard simulation tools:
  • Parameter identification from field data.
  • Validation in PSS®E, DIgSILENT, EMT environments.
  • Overlay of simulated vs. measured responses to prove accuracy.
  • Regulator-accepted audit documentation.

Compliance Documentation

Grid codes typically require evidence packaged in structured reports:
  • SAT (Site Acceptance Test)
  • ION (Initial Operation Notification)
  • FON (Final Operation Notification)

We compile these with:

  • Calibration certificates.
  • Test protocols.
  • Annotated results.
  • Executive summaries for decision-makers.
Effective Coordination

Why Power Producers Trust Grid Code?

Validated by traceable electrical measurements and event-based data logs. Adaptable teams that support testing in different regulatory environments. Clear, defensible technical evidence for regulator review. Clear, defensible technical evidence for regulator review.
Integrity

Independence and neutrality — trusted by regulators and financiers.

Synergy

Proven coordination with OEMs, EPCs, and system operators

Reach

Global reach with bilingual, resilient engineering teams

Clarity

Transparent, regulator-accepted methods and documentation

Every test we execute is grounded in standardized procedures, calibrated measurement processes, and traceable data validation. Our methodologies align with the rigor demanded by regulators and system operators, ensuring quantifiable, reproducible, and model-consistent results. With GridCode, asset performance isn’t assumed, demonstrated through precision field testing and compliant verification.

Standardized Methodology

Grid Code Portfolio

Grid Code Engineering provides specialized field testing services to demonstrate grid code compliance and operational readiness for power plants of all technologies and scales. Our services span from generator-level AVR and governor testing to full-plant performance, ride-through, and model validation. Every campaign is conducted independently, with calibrated instrumentation and regulator-accepted methodologies, and delivers audit-ready reports that withstand scrutiny from operators, OEMs, and authorities.
  • Model validation.
  • Voltage regulation (AVR).
  • Frequency regulation (Governor).
  • Telemetry and SCADA verification.
  • Plant performance and black-start.
  • Reactive capability and voltage support.
  • Ride-through during voltage and frequency disturbances.
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GRID CODE TESTING
Power plant modeling
We use PSSE® and EMTP® to model power plants for grid code compliance, ensuring reliable operation and grid integration.
On-site Grid Code Testing
Conventional and Renewable Power Plants
Our Testings
List of our common Grid Code Tests
POWER PLANTS
Grid code evaluation for power plants
The grid code specification in power plants
Grid Code Compliance
Why is it important to comply with the grid code in a power plant?
Modeling
Modeling in PSSE® and EMTP®
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