Synthetic Grid Example

Synthetic Grid Example

This directory contains a complete working example of the synthetic marine grid with Wave Energy Converter (WEC) and Current Energy Converter (CEC) devices fully integrated via FMU co-simulation.

Overview

This example demonstrates the complete workflow for integrating Marine Hydrokinetic (MHK) devices into a power system model using the FMU (Functional Mock-up Unit) methodology. Unlike the base Grid Models, this version has all components pre-integrated and ready to simulate.

Contents

PowerFactory Models

The PowerFactory_Models/ directory contains grid models with FMUs already integrated:

• FMU Controls.pfd - Control systems for the integrated FMUs
• Marine Microgrids CEC_WEC.pfd - Grid with both CEC and WEC integrated
• Marine Microgrids MHK integration - WEC.pfd - Grid with WEC only

FMU Models

The FMU_Models/ directory contains the compiled FMU files used in the PowerFactory simulations:

• WEC2G_EMS_ok_LVRT_FMU.fmu - Wave Energy Converter model
• Alex_Inverter_23b_FMU_2.fmu - Inverter control system
• HKT_grid_dyn_Bladerunner_2.fmu - Current Energy Converter (Hydrokinetic Turbine) model

How to Use This Example

1. Open PowerFactory: Launch DIgSILENT PowerFactory
2. Import Project: Open one of the .pfd files from PowerFactory_Models/
3. Verify FMU Paths: Ensure FMU file paths point to the files in FMU_Models/
4. Run Simulation: Execute the simulation to see MHK devices interacting with the grid
5. Analyze Results: View power flows, voltages, and device behavior

Example Scenarios

This example can demonstrate:

• Grid-connected WEC operation under varying wave conditions
• CEC (hydrokinetic turbine) integration and performance
• Fault ride-through (LVRT) capabilities
• Power quality and grid stability with MHK devices
• Energy management system behavior

Differences from Base Grid Model

Unlike the base Grid Models:

• ✅ FMUs are already integrated and configured
• ✅ Control systems are implemented
• ✅ Ready to run without additional setup
• ✅ Demonstrates best practices for FMU integration

Creating Your Own Integration

To create your own integration from scratch:

1. Start with the base Grid Models
2. Follow the FMU Method and Validation documentation
3. Use the FMU files from Marine Models
4. Refer to this example for configuration guidance

Validation

The methodology has been validated through cross-platform comparison studies. See FMU Method and Validation for detailed validation results.

Technical Details

• Simulation Time Step: [Add details]
• Co-simulation Method: AC Current Source proxy approach
• Interface Variables: Voltage (input), Active/Reactive current (output)
• Control Strategy: Grid-following with LVRT capability

Requirements

• DIgSILENT PowerFactory 2020 or later
• FMU interface license
• RMS or EMT simulation engine

Notes

• Ensure all FMU files are in the correct location before running simulations
• FMU paths in PowerFactory may need to be updated based on your local directory structure
• This example uses specific wave/current conditions - modify inputs as needed for your study