The Sumatera interconnected system is the second largest electricity network in Indonesia, second only to the Jawa-Madura-Bali (JAMALI) grid, and covers the entire Sumatera mainland.
At a Glance
|Operational systems:||Sumatera Bagian Utara (SUMBAGUT)
Sumatera Bagian Selatan & Tengah (SUMBAGSELTENG)
|Operating voltages:||275kV, 150kV, 70kV, 20kV, 0.4kV|
|Number of customers:||17,030,853 (2016)|
|Peak load (2017):||SUMBAGUT: 2,388 MW
SUMBAGSELTENG: 3,582 MW
|Installed capacity (2017):||SUMBAGUT: 3,270 MW
SUMBAGSELTENG: 5,292 MW
|Firm capacity (2017):||SUMBAGUT: 2,399 MW
SUMBAGSELTENG: 4,033 MW
|Maximum reserve margin at peak load (2017):||SUMBAGUT: 0.46%
|Base Generation Cost (2016):||Aceh: 1,383 Rp/kWh
Sumatera Utara: 1,235 Rp/kWh
Sumatera Barat: 1,074 Rp/kWh
Riau: 1,349 Rp/kWh
Sumatera Selatan, Jambi & Bengkulu: 1,046 Rp/kWh
Lampung: 1,034 Rp/kWh
|Customer Type||2016 Energy Sales|
Power Plant Fuel Mix
Fuel mix based on energy delivered as at Dec 2016:
While physically one contiguous network, the Sumatera Interconnected system is actually normally operated as two separate islands due to inter-area oscillatory stability issues. The system dispatcher is PLN P3BS based in Pekanbaru, Riau.
A 275kV transmission backbone is currently being developed along the main north-south corridor of the island. At present, the main backbone is still operated at 150kV, although several 275kV sections in Sumatera Selatan, Jambi and Begkulu (S2JB) were energised at the end of 2016.
This article is part of a series examining all of the major electricity networks in Indonesia. For more information and links to all of the articles, please refer to the overview page.