of generators, namely 3,100 MW Janamanjung Power Plant in the west coast, 372 MW Ulu Jelai Hydro Electric Power Plant in the east coast, and 4,100 MW Tanjung Bin Power Plant in the south, the 500 kV transmission system was extended from Bukit Tarek to Yong Peng via interconnection allows for electricity of Ayer Tawar, Tapah, Bentong South and Lenggeng. The completion of this interconnection allows for electricity transmission to the load centre, which is located in the Klang Valley area of Peninsular Malaysia. A project involving laying a 730 km high-voltage direct current transmission line and a 670 km undersea cable for the 2,400-megawatt Bakun hydroelectric dam has been considered. This may connect all three of Malaysia's electric utility companies with state grids: Tenaga Nasional Berhad (TNB), Sarawak Energy Berhad (SEB) and Sabah Electricity Sdn Bhd (SESB). Many of Sabah and Sarawak's generation plants are still not interconnected to a grid. Type of National Grid's transmission system Connection to Thailand The National Grid is interconnected in the north to Electricity Generating Authority of Thailand (EGAT)'s transmission system via the 300 kV HVDC interconnection of 300MV capacity and 132 kV HVAC double circuit overhead line of 90MW capacity each, linking Bukit Ketri-Chuping in the state of Perlis with Sadao, Sadao in Thailand. Connection to Singapore In the South of Malaysia, the National Grid is connected to the transmission system of Singapore Power Limited (SP) at Senoko via two 230 kV submarine cables with a transmission capacity of 200 MW each. Power generation Power generation capacity connected to the Malaysian National Grid is 22,858 megawatt, with a maximum demand of 17,788 megawatt as of April 2016 according to Suruhanjaya Tenaga. The generation fuel mix in peninsular is 45.55% gas, 50.23% coal, 3.59% hydro and 0.63% from other forms of fuel. Distribution level Distribution lines of 66kV, 33 kV, 22 kV, 11 kV, 6.6 kV and 400/230 volt electricity distribution network connect to the National Grid via transmission substations will have their voltages stepped down by transformers. Major incidents Following a major system collapse on 3 August 1996, TNB has undertaken joint studies with Tokyo Electric Power Company (TEPCO) to develop a controlled islanding scheme to prevent the occurrence of a complete system collapse by ensuring continuity of supply to the Kuala Lumpur Metropolitan and Multimedia Super Corridor (MSC). The islanding scheme would basically be a "last line of defense" after all