Provincial Headlines
PLN UID Distribusi Jawa Timur estimates, 2024 baseline. DC numbers aggregate operator filings tracked in the overlay file.
Surabaya DC Cluster · 20 kV Feeder Detail
Operator-level detail of the Surabaya DC cluster — the secondary peering point for the SG-JK extensions. Capacity expressed as IT load (MW) with the corresponding utility transformer rating (kVA). Confidence reflects how directly the address is sourced (high → press release / regulatory; medium → operator website; low → estate centroid).
| Operator | Site | Capacity (MW / kVA) | Feed Substation | Year | Notes |
|---|
Industrial Intakes · Petrochemical, Cement, Coal Terminals
The heavy industrial draw on the eastern Java ring: Petrokimia and Semen Gresik in the Gresik corridor, the Sidoarjo petrochemical belt, Tuban Semen Indonesia, and the Tanjung Awar-Awar coal terminal. These intakes typically peg between 30 and 250 MW and represent the dominant non-residential load on the ring outside Surabaya itself.
| Site | Sector | Capacity (MW) | Feed Substation | Notes |
|---|
Provincial Anchors
500 kV substations and major power plants drawn from the provincial filter of the base data file. PLTU Paiton (4.71 GW) is the largest coal block in Indonesia.
Major Plants (sorted by capacity)
500 kV Substations
150 kV Substations
Sibling Provinces
Continue across the Java ring — west into Jawa Tengah + DIY, further west into Jawa Barat, or north-west into the Jakarta + Banten load centre.
Jawa Tengah + DIY
North-coast coal corridor with Tanjung Jati B (2.64 GW) anchoring the central Java backbone. Lower DC density but a critical 500 kV bridge between the Jakarta load centre and the Paiton block to the east.
Jawa Barat
Hydro and geothermal heartland: Cirata 1.0 GW reservoir plus the Wayang Windu / Salak / Patuha geothermal complex. Hosts the Sentul + Karawang + Bandung DC clusters.
DKI Jakarta + Banten
Highest-density node on the Java-Bali grid — coastal coal + city-edge gas with 18+ known DC operators and ~11.5 GW peak load. Primary peering for the SG-JK cable systems.
Footnote: The Java-Bali submarine interconnect lands at Banyuwangi (Ketapang substation) on the eastern tip of the province; this page treats Banyuwangi as a Jatim node for visualization, but operationally the cable carries Bali's 200-300 MW peak draw. Industrial intakes around Gresik, Tuban and Sidoarjo are sourced from PLN UID Jatim feeder maps and OSM tagging; capacities reflect contracted MVA at the 150/20 kV transformer where published, otherwise peak demand from corporate ESG filings. Confidence levels on individual rows: high = official filing or operator press release with explicit address, medium = operator website lists area and was geocoded to estate centroid, low = inferred from peering or sales material with placement at industrial-estate centroid. The 20 kV layer is curated for visualization, not a complete distribution map.