Figure 23. Planned generation mix for Peninsular Malaysia in 2026

Source: Energy Commission Malaysia (2015), 11th Malaysia Development Plan.

The primary capacity addition to Peninsular Malaysia in 2020 will be from fossil fuels, primarily coal but also some natural gas.

Malaysia plans to strengthen its interconnection with Singapore (Plentong–Woodland) through the addition of a 600 MW HVDC line after 2020. Thailand and Malaysia are considering developing two new interconnections: a 300 MW, 300 kV HVDC line and a 100 MW, 132/115 kV HVAC line. The new 300 kV is an additional part of the existing Khlong Ngae–Gurun interconnection which capacity is 300 MW and already backed up Thailand and Peninsular system since 2002. Finally, a proposed 600 MW interconnection with Indonesia (to Pekan Baru, Sumatra) is expected to be commissioned after 2021, though this remains unconfirmed.

Singapore

As of the first quarter of 2018, total power capacity in Singapore was 13 614 MW, a notable increase over the 9 918 MW of installed capacity in 2011. Over the past few decades, Singapore’s electricity generation industry moved away from oil-fired steam turbine plants by building new combined-cycle gas turbine (CCGT) plants, or repowering existing plants and investing in new units. From 2014 to today, the share of natural gas-fired generation has risen to 95%. The remaining 5% of generation is based on other sources which include refuse/biomass, coal syngas, fuel oil, diesel and solar.

As of 2018, CCGT plants, including co-gen and tri-gen, made up 77.2% (or 10 508.2 MW) of total capacity and steam turbines 18.8% (or 2 554.6 MW). Open-cycle gas turbines made up 1.3% (or 180.0 MW), waste-to-energy plants 1.9% (or 256.8 MW) and solar PV 0.8% (or 114.8 MW).

Relative to other ASEAN countries, the electricity market structure in Singapore is more advanced, as competition has been introduced not only on the generation side, but also in the retail (customer facing) sector. Singapore Power is the national utility responsible for developing and maintaining the transmission and distribution systems.

Since 1985, Malaysia and Singapore have been interconnected via a 2 x 230 kV AC interconnection (Plentong–Woodlands) with a rated capacity of 500 MVA. This line consists of an AC overhead line (10 kilometres [km]) and submarine cables (2 km). This line provides a source of power supply during system emergencies for both interconnected power systems, and is managed jointly by TNB and SP PowerGrid.

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