The South Sumatera to West Java (SSWJ) Pipeline transports natural gas from Sumatera Island to West Java, supplying more than 90% of the demand for the West Java distribution pipeline, who are mainly industrial and power plant customers.

Considering the capacity limitations during peak demand for power plant customers, LNG injections from the Lampung Floating Storage Regasification Unit (FRSU) has been selected as an available supplementary supply. In order to obtain optimum total delivery capacity to the power plant, LNG injection rates and schedules were calculated using steady state and transient pipeline simulation.

The West Java natural gas distribution network has 4 city gates through which gas is supplied. Two of the city gates receive natural gas from the SSWJ transmission pipeline, which is connected to the Lampung FSRU, located on South Sumatera.

Optimum conditions were achieved by maximizing delivery throughput while minimizing the LNG supply requirement. The network model covers both the distribution and transmission systems, with a transient approach taken on the transmission pipeline to investigate the flexibility and linepack management.

The steady-state and transient strategy which has been engineered will be discussed.

The results indicate that utilizing the flexibility of the transmission pipeline and scheduling the LNG injection rate could increase the capacity of deliveries during peak demand periods, and the simulation conclusions were used by the Gas Planning group to determine nominations and allocations to the suppliers.


Java Island, the most populated island in Indonesia, uses 76% of the national electricity production [1]. This island has an interconnected electricity grid, linking various power plants, mainly coal fired and natural gas generated facilities. One of the most significant issues in meeting the electricity demand is to meet peak hour consumption. In the existing system, flexible electrical generation is delivered using natural gas, diesel oil and reservoir hydro power plant facilities. However, natural gas is the most convenient considering the availability of installed gas fired power plants, and the domestic availability of natural gas sources.

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