PV_INVERTER_LINK
PV inverter adapter: ramped export-limit curtailment with a hold-then-fail-down dispatch watchdog, signed power-factor control on the kVA circle, and curtailed-energy accounting.
When to use it
Use PV_INVERTER_LINK when a PV plant is curtailed to an export limit by a microgrid or utility dispatch signal over SunSpec Modbus, the reactive contribution is set by power factor, and the site has to be able to show how much energy the curtailment cost.
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 | — |
| PARAMS | STRING | — |
| LIMIT_PCT | REAL | % |
| PF_SP | REAL | p.u. |
| KW_FB | REAL | kW |
| KW_AVAIL_FB | REAL | kW |
| LINK_OK | BOOL | — |
| DISP_OK | BOOL | — |
| KW_RATED | REAL | kW |
| S_RATED | REAL | kVA |
| RAMP_PCT_S | REAL | %/s |
| LINK_HOLD | TIME | — |
| FAIL_LIMIT_PCT | REAL | % |
| PF_MIN | REAL | p.u. |
| CURT_DB_PCT | REAL | % |
| ACK | BOOL | — |
Outputs
| Port | Type | Unit |
|---|---|---|
| KW | REAL | kW |
| KW_AVAIL | REAL | kW |
| CURTAILED | BOOL | — |
| LIMIT_CMD_PCT | REAL | % |
| KW_LIMIT | REAL | kW |
| KVAR_CMD | REAL | kvar |
| CURTAILED_KWH | REAL | kWh |
| PF_CLAMPED | BOOL | — |
| WRITE_EN | BOOL | — |
| VALID | BOOL | — |
| ALM_LINK | BOOL | — |
| ALM_DISPATCH_STALE | BOOL | — |
| ALM_CFG_ERR | BOOL | — |
IEC 61499 event interface
EI INIT, REQ·EO INITO, CNF
Validation evidence
- Tests
- 11
- Simulated scans
- 3319
- 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 PV_INVERTER_LINK — free
Create a free Ri Tech account to download the block. You get the Structured Text body, the Rockwell Add-On Instruction (.L5X), the Schneider Control Expert DFB (.XDB), PLCopen XML, the IEC 61499 function block type (.fbt) and the datasheet.
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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.