VAR_PF_CTRL
VAr-mode or power-factor-mode excitation control for a grid-paralleled machine, with the power-factor target derived from real power.
When to use it
Use VAR_PF_CTRL when a machine runs in parallel with a stiff grid that already fixes the voltage, so the AVR can no longer control voltage and must instead be told how much reactive power — or what power factor — to 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 | — |
| GRID_PARALLEL | BOOL | — |
| MODE | USINT | — |
| PF_SP | REAL | p.u. |
| KVAR_SP | REAL | kvar |
| KW | REAL | kW |
| KVAR | REAL | kvar |
| KW_OK | BOOL | — |
| KVAR_OK | BOOL | — |
| KVAR_RATED | REAL | kvar |
| KP | REAL | %/% |
| TI | REAL | s |
| BIAS_LIM | REAL | % |
| DEADBAND_PCT | REAL | % |
| ACK | BOOL | — |
Outputs
| Port | Type | Unit |
|---|---|---|
| V_BIAS | REAL | % |
| KVAR_TGT | REAL | kvar |
| PF_ACT | REAL | p.u. |
| ERR_KVAR | REAL | kvar |
| AT_SP | BOOL | — |
| AT_LIMIT | BOOL | — |
| VALID | BOOL | — |
| ALM_MODE_INVALID | BOOL | — |
| ALM_PF_UNDEF | BOOL | — |
| ALM_METER_FAULT | BOOL | — |
| ALM_CFG_ERR | BOOL | — |
IEC 61499 event interface
EI INIT, REQ·EO INITO, CNF
Validation evidence
- Tests
- 10
- Simulated scans
- 140
- 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 VAR_PF_CTRL — free
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