“Draw a 480 V community microgrid single-line diagram with a utility PCC breaker, 350 kWdc solar and 300 kW inverter, 750 kWh LFP battery with 300 kW grid-forming PCS, 400 kW generator, and a 250 kW critical-load feeder for a shelter and grocery.”
看懂背後的決策。
The PCC breaker creates a defined utility-to-microgrid boundary.
A grid-forming PCS supports the 480 V bus during islanded operation.
The solar inverter provides renewable generation to the same bus.
A 400 kW generator supplies extended outage support.
The critical feeder limits island operation to shelter and grocery loads.
Use this architecture for a small resilient microgrid where not every site load must be backed up. Islanding controls and generator paralleling requirements require detailed engineering.
常見問題
What makes the PCS grid-forming?
It can regulate local voltage and frequency when the utility source is absent.
Why include a generator?
It extends operation when an outage lasts longer than battery and solar resources can cover.
Can all loads be backed up?
They can if capacity permits, but a separate critical feeder is often more economical and resilient.