MG_BLACK_START
Microgrid black-start sequencer: proves the bus dead, energises it from the grid-forming source, brings rotating plant on, and restores load in blocks.
When to use it
Use MG_BLACK_START when a microgrid has to be brought up from a dead bus with no utility behind it, and the restoration has to be stepped so the island is never asked to pick up more load than the sources already online can hold.
Interface
The published port signature. This is the whole of what the block exposes to your program — the implementation body is not shown here and ships with the download.
Inputs
| Port | Type | Unit |
|---|---|---|
| ENABLE | BOOL | — |
| START | BOOL | — |
| ABORT | BOOL | — |
| SEQUENCE | USINT | — |
| MEAS_OK | BOOL | — |
| BUS_V_PU | REAL | pu |
| BUS_F_HZ | REAL | Hz |
| PCC_OPEN | BOOL | — |
| GFM_RDY | BOOL | — |
| GEN_RDY | BOOL | — |
| GEN_ONLINE | BOOL | — |
| N_BLOCKS | USINT | — |
| BLOCK_KW | REAL | kW |
| AVAIL_CAP_KW | REAL | kW |
| LOAD_KW | REAL | kW |
| F_NOM | REAL | Hz |
| F_BAND | REAL | Hz |
| V_DEAD_PU | REAL | pu |
| V_MIN_PU | REAL | pu |
| V_MAX_PU | REAL | pu |
| STEP_TMO | TIME | — |
| BLOCK_DWELL | TIME | — |
| ACK | BOOL | — |
Outputs
| Port | Type | Unit |
|---|---|---|
| STEP | USINT | — |
| GFM_CMD | BOOL | — |
| GEN_START_CMD | BOOL | — |
| BLOCK_CLOSE_CMD | BOOL | — |
| BLOCKS_ON | USINT | — |
| HEADROOM_KW | REAL | kW |
| BUS_HEALTHY | BOOL | — |
| ENERGIZED | BOOL | — |
| RUNNING | BOOL | — |
| DONE | BOOL | — |
| ALM_STEP_TMO | BOOL | — |
| ALM_MEAS_HOLD | BOOL | — |
| ALM_GEN_TMO | BOOL | — |
| ALM_NOT_DEAD | BOOL | — |
| ALM_MEAS_FAULT | BOOL | — |
| ALM_CFG_ERR | BOOL | — |
Supervised control write
MG_BLACK_START commands a real actuator. It is written to sit underneath your own interlock, permissive and protection logic — not to replace it. Commission it as you would any control block you wrote yourself.
Validation evidence
- Tests
- 12
- Simulated scans
- 146
- Simulator
- v0.1.0
Complete IEC 61131-3 implementation with a published test suite that runs on the vplant simulator. The counts above are that suite, executed on this build.
- Conforms to IEC 61131-3
Download MG_BLACK_START — free
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Source is never published on this page. The implementation is released to a signed-in Ri Tech account — free of charge, but never anonymously.