Siemens has contracted to set up an HL-class power island for a new combined cycle power plant in South Korea. The two units will be the first of the Siemens showcase HL-class gas turbines to be supplied to a customer in Asia. The new plant, which will be built in Yeoju, in South Korea’s Gyeonggi Province, will run on regasified liquefied natural gas (LNG) and offer a generating capacity of more than 1 GW. With a maximum efficiency rating of more than 63 % the GT should allow the power station to get the most out of the valuable LNG fuel for electricity generation. The customer is South Korean EPC SK Engineering & Construction Co., Ltd, which is constructing the entire plant for the independent power producer Yeoju Energy Services. 

“The country has to import its entire gas requirement in the form of LNG by sea at huge cost, therefore higher efficiency ratings mean major financial benefits commented Andreas Pistauer, head of Power Generation Asia and Pacific at Siemens Gas and Power.

“Our collaboration on the Paju (Jangmoon) and Wirye projects has proven that we can construct highly efficient and high-performance power stations safely and reliably. Utilising [this HL-class technology] we are convinced that the resulting combined cycle power plant will provide especially economical and reliable energy, said Harrison Lee, senior executive vp of SK Engineering & Construction.

Yeoju is designed as a multi-shaft CCPP. Each of the gas turbines and the steam turbine will each drive its own generator. Siemens’ power island includes two SGT6-9000HL gas turbines, one SST6-5000 steam turbine, three SGen6-2000P generators, two heat recovery steam generators, and the SPPA-T3000 distributed control system. The plant has a capacity of 1004 MW.  Commissioning is scheduled for mid-2022.

Power stations that will use the new Siemens HL-class gas turbine are currently under construction in North Carolina and Mississippi in the US, and in Lincolnshire in the UK. Yeoju is the fourth order Siemens has received for its HL-class, and the company has now sold a total of five machines of this type. The HL-class is based on the design of the SGT-8000H series of GTs, which has now accumulated more than one million service hours around the world.