- availability types
- ["available","total","requested","contracted","unknown"]
- binding
- false
- directions
- ["offtake","injection"]
- firmness
- ["firm","unknown"]
- geometry precision
- exact
- includes reserved projects
- null
- non additive
- true
- notes
- ["SPM publishes capacity per substation group, not per site: 871 rows are 378 groups (40 BSP, 338 primary) repeated for each of their member sites. Every capacity value is identical on every row of a group. The asset is the group (keyed SPM/<group name>, the only unique key: mGRID repeats MACHYNLLETH for two groups); its member sites are listed in the asset's attributes (`member_sites`) and are the points of its MultiPoint geometry. Each value is taken once per group, so nothing can be added up across sites.","Two groups (BRD T1, ROYAL INSURANCE (NEW QUAY)) leave the per-site columns empty; they are located from the combined `latitude,longitude` column instead.","Each primary group is linked to the BSP group it names (parent_source_asset_id). The hierarchy shares upstream capacity: never add values across levels.","Bare NaN tokens (7,318 on 2026-09-25) mark what the merge left empty and are read as not published. Generation firm, available and reverse-power-flow capacities are strings: numeric, or \"unknown\" at 60 groups, served as an explicit unknown (value null, source_value \"unknown\"), never zero.","The dataset schema's labels for demandAvailableCapacity and demandMinimum are swapped (\"The minimum demand …\" / \"The available demand capacity …\"). The data are not: demandAvailableCapacity equals firm capacity minus maximum demand at 252 of 378 groups, and is read as available capacity.","Negative available capacity is published at 22 groups for generation and 8 for demand (deficits, flagged in details).","SPEN's reverse-power-flow figures equal its generation figures on every group (total = generation firm, available = generation available): they are published, and served, as SPEN's own reverse-power-flow series, but they carry no information of their own.","Connection activity (LTDS Table 6, 11 kV) is merged onto the member-site rows of 216 groups. One group (CHESTER MAIN GT4 / CRANE BANK GT1 / GUILDEN SUTTON GT1 / SALTNEY G2A) carries two different sets of 11 kV figures with nothing to tell them apart: its activity is rejected, its capacities are served.","RAG (`Green|Amber|Red|unknown`) and limiting factor (`thermal`, `fault level`, lower case) are verbatim in details and attributes. OtherConstraints is one text for every group: demand also depends on upstream capacity, generation on voltage control and fault-level contribution.","\"Past Connection Activity Total …\" columns are SPEN's own summary outside the standard, described only as \"connection activity\"; served with availability `unknown`."]
- spatial scope
- substation
- technologies
- ["generic_load","generic_generation"]
- units
- ["MVA","count"]