Korea Western Power Co, a power generation subsidiary of Korea Electric Power Company based in Seoul, began construction of a new 600 MW hydroelectric power project in Cheongsong, South Korea, in September 2000. The pumped storage project, located upstream on the Naktong river in the province of Kyongsangbukdo, approximately 314 km southeast of Seoul, will help to support the economic growth of this mountainous region near Juwang National Park that is home to approximately 34,000 people.

Civil work for the US$304.8M scheme, financed by Korea Western Power, is being carried out by a consortium of Donga Construction Company and Samsung Engineering & Construction Company, both Korean companies. Hyundai Engineering is serving as project consultant. The facility is expected to begin generating electricity by the end of 2006.

In the first open, international competitive bidding for a hydro power project in South Korea, following the country's entry into the World Trade Organization, Korea Western Power awarded the contract for the project's equipment supply to GE-hydro in January 2002.

GE will supply, install and commission two 300 MW reversible pump turbines, 333 MVA motor/generators, governors, exciters and balance of plant equipment. Pumping operations will be performed in off-peak periods using relatively low cost power from other generation sources. The motor/generators are each rated at 333/339.8 MVA at 18 kV, 0.9/0.95 power factor and 300 rpm. Output of the pump turbine is 306 MW at a net head of 307.9 m. Maximum pump output is 31 MW. Each unit has a specified allowable duration to change operational modes, from standstill, pump, generate, generate-condense and pump condense.

GE Energy in Norway, part of GE Hydro, will provide the project management, conceptual design and turbine runners for the project. Generators will be designed and supplied through GE Canada and other sub-suppliers, while ABB Canada will supply the control equipment, static starters and exciters. Shipping of equipment for the project will begin in April 2004.

The plant will be connected to the local power grid via a new, 20 km, two-circuit transmission line connected to the 345 kV bus of the Shinyoungil substation.

Interesting fact: The plant's two 300-MW pump-turbines are operated remotely from the 600-MW Samrangjin Pumped-Storage project 130 kilometers away.

Open-loop Pumped Hydro Storage