Construction of the Largest Geothermal Power Plant for Wayang Windu Project, Indonesia

Abstract

Sumitomo Corporation, Japan obtained the Engineering, Procurement and Construction (EPC) contract with Magma Nusantara Limited (MNL), Indonesia for Wayang Windu Geothermal Power Plant including power station and Steamfield Above Ground System (SAGS) in June 1997. MNL, as an Independent Power Producer (IPP) will operate the plant and sell electricity to Persahaan Listrik Negara (PLN) for 30 years. The plant will include 2 units of 110MW power generation facilities and another 2 units of 110MW as an option in the future. Fuji Electric, Japan, as the subcontractor of Sumitomo Corporation, supplied steam turbines, generators, condensers and ancillary equipment as well as constructing and commissioning the plant. The geothermal steam turbine manufactured at Fuji Electric, Kawasaki, Japan is the largest capacity (rated 110MW, max. 115MW) in the world as a single flash and single casing with 27.4-inch- long last stage blades (LSB). The first set of 110MW power generation facilities including the power station and SAGS was ready for synchronization in August 1999 and second unit is awaiting notice to proceed from MNL.