Skip to content

Readme.md

Latest commit

 

History

History
123 lines (92 loc) · 4.48 KB

Readme.md

File metadata and controls

123 lines (92 loc) · 4.48 KB

CEC Model - Current Energy Converter (Hydrokinetic Turbine)

This directory contains the complete Current Energy Converter (CEC) model, also known as a Hydrokinetic Turbine (HKT), with grid integration capabilities.

Overview

The CEC/HKT model is a comprehensive Simulink implementation that simulates a tidal or river current energy converter with permanent magnet synchronous generator (PMSG), power electronics, and grid connection. The model captures the hydrodynamic-to-electric energy conversion process for marine current energy systems.

Model Files

  • HKT_grid_dyn_final.slx - Complete hydrokinetic turbine model
  • river_model_w_IM_250418_23a.slx - Alternative river current model with induction machine
  • HKT_grid_dyn_Bladerunner.fmu - Pre-compiled FMU for co-simulation with PowerFactory or other tools
  • HKT_Params.txt - Model parameters and configuration settings
  • Velocity.mat - Sample current velocity profile data

System Components

1. Hydrokinetic Turbine

  • Input: Water current velocity (m/s)
  • Function: Extracts kinetic energy from flowing water
  • Characteristics:
    • Blade radius: 0.5 m
    • Optimal tip-speed ratio (λ_opt): 3.4
    • Maximum power coefficient (Cp_max): 0.46
    • Number of turbines: 1
    • Rated power: 11 kW

2. Permanent Magnet Synchronous Generator (PMSG)

  • Type: Direct-drive PMSG (10:1 gear ratio)
  • Specifications:
    • Pole pairs: 5
    • Flux linkage: 1.9 Wb
    • Resistance: 0.069 Ω (including filter)
    • Inductance: 2.06 mH (including filter)
    • Combined inertia: 21.46 kg⋅m² (turbine + generator)

3. Power Electronics

  • Rectifier: Converts variable-frequency AC from generator to DC
  • DC-link: Energy storage and voltage regulation
  • Inverter: Grid-connected inverter for power injection

4. Control System

  • Maximum Power Point Tracking (MPPT): Optimizes power extraction across varying current speeds
  • Grid synchronization: Maintains proper voltage and frequency alignment
  • Power quality control: Ensures compliant grid operation

Key Features

  • ✅ Physics-based hydrodynamic model
  • ✅ Realistic turbine Cp-TSR characteristics
  • ✅ PMSG model with generator dynamics
  • ✅ Maximum power point tracking
  • ✅ Grid-connected operation
  • ✅ FMU export capability for co-simulation

Model Parameters

Key parameters (from HKT_Params.txt):

  • Water density (ρ): 1023 kg/m³
  • Blade radius (R): 0.5 m
  • Gear ratio (Ng): 10:1
  • Rated power: 11 kW
  • Simulation time step (Ts): 100 μs

Performance Characteristics

The model includes validated performance curves:

Cp vs TSR Power coefficient vs tip-speed ratio characteristics

Power Output Turbine, generator, and grid power profiles

Grid Voltage and Current DC bus and grid-side electrical characteristics

TSR Tracking Tip speed and current velocity with TSR tracking

Using the Model

Standalone Simulation (Simulink)

  1. Open HKT_grid_dyn_final.slx in MATLAB/Simulink
  2. Load parameters: run('HKT_Params.txt')
  3. Configure current velocity input (or use Velocity.mat)
  4. Run simulation
  5. Analyze turbine performance and power output

FMU Co-simulation (with PowerFactory)

  1. Use the pre-compiled HKT_grid_dyn_Bladerunner.fmu file
  2. Import into PowerFactory (see FMU Method guide)
  3. Connect to grid model at designated bus
  4. Configure current velocity profile as input
  5. Run co-simulation

Exporting Your Own FMU

  1. Open HKT_grid_dyn_final.slx
  2. Use Simulink FMU export functionality
  3. Follow the FMU Method guide for configuration

Model Inputs

  • Current Velocity (m/s) - Water current speed
  • Grid Voltage - Three-phase grid voltage (when connected)

Model Outputs

  • Active Power (W) - Power injected to grid
  • Reactive Power (VAr) - Reactive power exchange
  • DC-link Voltage (V) - Intermediate DC voltage
  • Generator Speed (rad/s) - Rotational speed
  • Tip-Speed Ratio (TSR) - Operating point indicator
  • Power Coefficient (Cp) - Efficiency metric

Notes

  • Current velocity profiles can be customized in Velocity.mat
  • The model is designed for tidal/river current applications
  • Power output scales with current velocity cubed (P ∝ u³)
  • See HKT_figures/ directory for detailed performance curves