I understand you are having 3 microgrid models in Simulink and want to know how to connect them so that they can share power, resources or data.
You can setup the cluster in following way:
1. Define each microgrid's input and output: Each microgrid is a modular block with following properties:
- Power interfaces (AC/DC, voltage levels, connection points)
- Control signals (frequency, voltage, load, control, communication lines)
- Measurement points (voltage, current, power flow)
2. Interconnection Type: You can connect the microgrid in following ways:
- electrical interconnection (via transmission lines, transformers, or buses)
- Control coordination (via communication and centralized or decentralized controllers)
3. Create a Master Simulink Model
- Open a new Simulink model – this will be your microgrid cluster
- Drag and drop (or reference) the three microgrid models as subsystems or model references.
4. Design Electrical Connections
- Use three-phase or single-phase lines to connect the outputs of each microgrid.
- Introduce transformers or converters if different voltage levels or AC/DC systems are involved.
- Include switches or breakers for testing grid-forming/grid-following behaviors.
Here is the following example of the electrical connection:
Microgrid 1 --> Bus 1 --> Transmission Line --> Bus 2 <-- Microgrid 2
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Microgrid 3
5. You can try to implement Control Coordination: Implementing control coordination in a microgrid cluster offers significant benefits in terms of stability, efficiency, and resilience. You can do the same by following the below mentioned steps:
- Add a central controller block or design a distributed control algorithm using Simulink blocks or Stateflow: You have two primary options for implementing control logic:
a) Centralized Control:
- Add a central controller block in your main Simulink model that gathers measurements from all microgrids.
- This controller computes control signals (like power dispatch, voltage reference, frequency setpoint) and sends them to each microgrid in the cluster.
- Ideal for simple setups or systems with a strong communication infrastructure.
b) Distributed Control:
- Design individual control blocks within each microgrid that can communicate with others to reach consensus (e.g., using consensus algorithms or local droop control).
- This approach improves scalability and fault tolerance, as there is no single point of failure.
- Use Stateflow, MATLAB Function blocks, or Discrete Event systems to model coordination logic.
2. Pass signals (like frequency, power demand, voltage setpoints) using:
3. Goto/From blocks
4. Data Store Memory
5. Bus signals
6. Simulink Messages for more realistic communication modeling
6. Synchronization and Load Sharing: You can make sure of the following points to ensure smooth synchronization and efficient load sharing.
- All microgrids are synchronized in terms of frequency and phase (if AC).
- Implement droop control or other load-sharing mechanisms.
- Add PLL (Phase-Locked Loop) or synchronizers if needed.
7. Run Simulation and Monitor Performance
- Use scopes, displays, or data logging to check:
- Power flow between microgrids
- Voltage/frequency stability
- Load sharing
- Test fault scenarios or disconnection/reconnection cases.
Hope it helps!
