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SPD constraint tables (regions, interconnectors, connection points)

Source: R/constraints.R
aemo_spd_constraints.Rd

Returns the SPD (Security and Projected Dispatch) constraint coefficient tables from MMSDM. Where GENCONDATA gives the high-level equation definition, the SPD tables give the per-term coefficients used in the NEMDE dispatch optimisation:

Usage

aemo_spd_constraints(
  table = c("region", "interconnector", "connection_point"),
  constraint_id = NULL
)

Source

AEMO NEMweb MMSDM archive, SPDREGIONCONSTRAINT / SPDINTERCONNECTORCONSTRAINT / SPDCONNECTIONPOINTCONSTRAINT.

Arguments

table

One of "region" (default), "interconnector", or "connection_point".

constraint_id

Optional character vector of GENCONID/CONSTRAINTID values.

Value

An aemo_tbl with columns from the requested SPD table. GENCONID and FACTOR (the coefficient) are always present; other columns vary by table.

Details

  • "region": SPDREGIONCONSTRAINT (regional-demand and regional-generation terms).

  • "interconnector": SPDINTERCONNECTORCONSTRAINT (interconnector-flow terms).

  • "connection_point": SPDCONNECTIONPOINTCONSTRAINT (per-DUID connection-point terms).

These tables are required for NEM dispatch replication (the nempy Python package, Gorman, Bruce & MacGill 2022, JOSS 7(70) 3596, doi:10.21105/joss.03596, uses all three when reproducing NEMDE solves).

See also

aemo_gencon() for the equation-level metadata, aemo_constraints() for the 5-min binding-constraint feed with shadow prices.

Other dispatch: aemo_bids(), aemo_constraints(), aemo_dispatch_units(), aemo_fcas_enablement(), aemo_gencon(), aemo_interconnector(), aemo_market_notices(), aemo_outages(), aemo_rooftop_pv()

Examples

# \donttest{
op <- options(aemo.cache_dir = tempdir())
try({
  s <- aemo_spd_constraints(table = "interconnector")
  head(s)
})
#> ℹ Downloading <https://nemweb.com.au/Data_Archive/Wholesale_Electricity/MMSDM/2…
#> ✔ Downloading <https://nemweb.com.au/Data_Archive/Wholesale_Electricity/MMSDM/2…
#> 
#> # aemo_tbl: NEM SPDINTERCONNECTORCONSTRAINT (SPD constraint coefficients)
#> # Source:   https://nemweb.com.au/Data_Archive/Wholesale_Electricity/MMSDM
#> # Licence:  AEMO Copyright Permissions Notice
#> # Retrieved: 2026-09-19 11:09 UTC 
#> # Rows: 6  Cols: 6
#> 
#>   interconnectorid effectivedate versionno            genconid factor
#> 1        VIC1-NSW1    2026-08-01         1 #R036415_001_RAMP_V  0.751
#> 2        VIC1-NSW1    2026-08-01         1 #R036415_001_RAMP_F  0.751
#> 3        N-Q-MNSP1    2026-08-01         1 #R036415_002_RAMP_V -0.168
#> 4        NSW1-QLD1    2026-08-01         1 #R036415_002_RAMP_V -0.173
#> 5        VIC1-NSW1    2026-08-01         1 #R036415_002_RAMP_V  0.714
#> 6        N-Q-MNSP1    2026-08-01         1 #R036415_002_RAMP_F -0.168
#>           lastchanged
#> 1 2026/08/01 19:18:29
#> 2 2026/08/01 19:18:30
#> 3 2026/08/01 19:18:32
#> 4 2026/08/01 19:18:32
#> 5 2026/08/01 19:18:32
#> 6 2026/08/01 19:18:33
options(op)
# }