BEYOND SARAWAK

The Sarawak–West Kalimantan Interconnection is a cross-border HVAC link connecting two systems at the Mambong 275kV substation in Sarawak to the Bengkayang 275kV substation in West Kalimantan, through a double circuit 275kV transmission line at a system frequency of 50Hz.

This Interconnection will:

• Improve security of supply through the sharing of spinning reserve.
• Optimize operation cost through the sharing of spinning reserve and generation capacity.
• Improve the reliability of the network, system frequency and voltage control.
• Provide assistance to cope with unforeseen generation delays and unexpected load growth.
• Facilitate economic collaboration between Sarawak and West Kalimantan.
• Serve as a catalyst for future potential interconnection (ASEAN Power Grid).

On track to becoming a regional powerhouse in ASEAN, Sarawak Energy is exporting an average of 190 to 200MW of power to Indonesian national utility, Perusahaan Listrik Negara (PLN).

Sarawak Energy commenced the initial export of power to Indonesia in January 2016. The project is one of the most significant milestones towards realising the ASEAN Power Grid, an initiative by the Association of Southeast Asian Nations to strengthen electricity infrastructure in the region. The reasons for the project’s significance are threefold.

Sarawak Energy has also developed plans with our neighbours, Sabah and Brunei, for further interconnection projects (power exports) that will advance the concept of the ASEAN Power Grid.