DGT6-300H S1 / S2 – H-class gas turbines of 270–380 MW
DGT6-300H is a series of heavy-duty H-class power gas turbines for simple-cycle gas turbine plants and combined-cycle plants. The S1 model at 60 Hz has an output of 270 MW, and the upgraded S2 (class H+) delivers 380 MW. Efficiency in combined cycle exceeds 60 % and 63 % respectively.
- Output (simple cycle)
- 270 MW (S1); 380 MW (S2)
- Simple-cycle efficiency
- > 40 % (S1); > 43 % (S2)
- Combined-cycle efficiency
- > 60 % (S1); > 63 % (S2)
- Combined cycle 1+1
- > 400 MW (S1); > 570 MW (S2)
Price, availability and lead time on request. We help with analogue selection, customs clearance and delivery.
Description
The manufacturer was the first in Korea and the fifth in the world to develop an H-class gas turbine. Development of the 270 MW machine began in 2013, the basic design was completed in 2017 and the prototype was built in 2019. Such turbines are intended for simple-cycle gas turbine plants and for combined-cycle plants with steam turbines. The lead turbine was delivered to the Gimpo CHP plant, in commercial operation since 2023. The full production cycle, from casting and forgings to assembly, is concentrated in Changwon (Korea).
The model DGT6-300H S1 (60 Hz) has an output of 270 MW and a simple-cycle efficiency above 40 %, and above 60 % in combined cycle. The upgraded S2 (class H+) delivers 380 MW at an efficiency above 43 % in simple cycle and above 63 % in combined cycle. A normal start takes 20 min, a fast start 12 min, minimum load is 40 % and the load ramp rate is 40 MW/min (S1) and 55 MW/min (S2). Emissions without SCR: NOx 15 ppm (S1) and 30 ppm (S2), CO 10 ppm. A 1+1 combined-cycle block gives over 400 MW (S1) and over 570 MW (S2), and a 2+1 block over 800 and over 1140 MW. The steam turbines DST-S10, DST-S20 and DST-S30 work in the combined-cycle plant.
The compressor has several stages of variable inlet guide vanes and is designed for changes in ambient air temperature and load. The blades are fixed with axial and circumferential locks, and the guide vanes are cantilevered. The premix combustor gives low emissions and deep turndown, and runs on natural gas, liquid fuel and low-calorific gases. The turbine has four stages and was designed with 3D aerodynamics. The active clearance control system DOCS and the compact cooling air cooler PCHE raise efficiency and manoeuvrability.
Control is provided by the GUARDIAN platform with redundant controllers. Versions for hydrogen blends and for 100 % hydrogen are under development. Changwon has a full-speed, full-load test bed for 50 and 60 Hz. The production capacity of the gas turbine plant is 2.7 GW per year.
Technical specifications
| Output (simple cycle) | 270 MW (S1); 380 MW (S2) |
|---|---|
| Simple-cycle efficiency | > 40 % (S1); > 43 % (S2) |
| Combined-cycle efficiency | > 60 % (S1); > 63 % (S2) |
| Combined cycle 1+1 | > 400 MW (S1); > 570 MW (S2) |
| Combined cycle 2+1 | > 800 MW (S1); > 1140 MW (S2) |
| NOx without SCR | 15 ppm (S1); 30 ppm (S2) |
| CO | 10 ppm |
| Start normal / fast | 20 / 12 min |
| Load ramp rate | 40 MW/min (S1); 55 MW/min (S2) |
| Minimum load | 40 % |
| Turbine | 4 stages |
| Fuel | natural gas, liquid fuel, low-calorific gases; hydrogen version under development |
Request a price and lead time
DGT6-300H S1 / S2 – H-class gas turbines of 270–380 MW. We reply within one business day.
Or email sales@usk.ua or call 044 339-50-20.
Questions and answers
What output and efficiency do the DGT6-300H S1 and S2 have?
The S1 at 60 Hz gives 270 MW at an efficiency above 40 % in simple cycle and above 60 % in combined cycle. The S2 gives 380 MW at an efficiency above 43 % and above 63 %.
What output does a combined-cycle block based on these turbines have?
A 1+1 block gives over 400 MW for the S1 and over 570 MW for the S2. A 2+1 block gives over 800 and over 1140 MW respectively.
What are the emissions and start time of the turbine?
Emissions without SCR are NOx 15 ppm for the S1 and 30 ppm for the S2, CO 10 ppm. A normal start takes 20 min, a fast start 12 min.
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