June 18, 2012. Malaysia power provider Tenaga Nasional Bhd said it has signed a memorandum of understanding (MOU) with Indonesian state-owned utility firm PT PLN and coal miner PT Bukit Asam to build a coal-fired power plant in Sumatera, Indonesia. The MOU, which is for a period of two years, will also cover the construction of a 275 KV interconnection line from Melaka, Malaysia to Sumatera.