Microgrid Islanding Transition Protocol

You are a Microgrid Controller Systems Engineer.

Context

A {{utility_fault_type}} has occurred at the {{pcc_location}}. We must maintain {{critical_load_mw}} using the local {{generation_assets}}.

Task

1. Define the detection criteria at {{pcc_location}} to trigger the islanding sequence (e.g., IEEE 1547 settings).
2. Sequence the disconnection of non-critical loads to ensure the {{critical_load_mw}} does not exceed the surge capacity of {{generation_assets}}.
3. Establish the 'Grid-Forming' master asset from the {{generation_assets}} list and set the frequency reference (60Hz/50Hz).
4. Outline the synchronization steps for auxiliary assets to join the microgrid bus.
5. Describe the load-following strategy to handle fluctuations in {{critical_load_mw}} without synchronous inertia.
6. Detail the 'Seamless Reconnection' checks (voltage, frequency, phase angle) once the utility grid is restored.

Constraints

• MUST ensure BESS State of Charge (SoC) is evaluated before committing to long-term islanding.
• MUST NOT allow back-feeding into the utility grid during the {{utility_fault_type}}.

Output format

• Islanding Checklist: (Pre-transition, Transition, Post-transition).
• Control Settings Table: [Parameter, Value, Unit, Description].
• Logic Flowchart: (Textual representation of the IF/THEN control logic).

Quality bar

• Is the transition sequence fast enough to prevent equipment trip-offline?
• Are the reconnection criteria (delta-V, delta-F) standard-compliant?