PEAK_SHAVE_CTRL
Peak shaving against the utility demand charge, acting on the PROJECTED interval demand rather than instantaneous tie power.
When to use it
Use PEAK_SHAVE_CTRL when a site runs its own generation to hold the utility demand below a target, and the target is a demand charge measured over the utility's integrating interval rather than an instantaneous limit.
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 | — |
| TIE_KW | REAL | kW |
| TIE_OK | BOOL | — |
| SHAVE_SP | REAL | kW |
| HYST | REAL | kW |
| MIN_RUN | TIME | — |
| START_DELAY | TIME | — |
| STOP_DELAY | TIME | — |
| DEMAND_MODE | BOOL | — |
| DEMAND_INT | TIME | — |
| INTERVAL_SYNC | BOOL | — |
| ACK | BOOL | — |
Outputs
| Port | Type | Unit |
|---|---|---|
| ACTIVE | BOOL | — |
| RUN_REQ | BOOL | — |
| STOP_REQ | BOOL | — |
| DEMAND_KW | REAL | kW |
| PROJ_KW | REAL | kW |
| INTERVAL_KWH | REAL | kWh |
| INTERVAL_MIN | REAL | min |
| MIN_RUN_HELD | BOOL | — |
| VALID | BOOL | — |
| ALM_TIE_FAULT | BOOL | — |
| ALM_CFG_ERR | BOOL | — |
IEC 61499 event interface
EI INIT, REQ·EO INITO, CNF
Supervised control write
PEAK_SHAVE_CTRL 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
- 8
- Simulated scans
- 266
- 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
- Conforms to IEC 61499
Download PEAK_SHAVE_CTRL — free
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