500MW Class USC Coal Fired Power Plant

KEPCO E&C has performed basic and detailed design, procurement of materials and equipments, construction, and supervision of test operation for Boryeong Thermal Power Plant Units 3 & 4 to secure Korean standard coal fired engineering technology. Up to now, we have performed A/E for total of 36 units.
KEPCO E&C’s 500MW class Ultra Super-Critical Coal Fired Thermal Power Plant is designed to operate with high efficiency even under the conditions such as daily shutdown, weekend shutdown, sudden load changes, and partial load. Furthermore, the Ultra Super-Critical (USC) steam condition (246㎏/㎠g, 566℃/593℃) engineering technology is recognized as the world’s top level in efficiency, environmental effects, and economic feasibility.
U.S.’s ‘Electric Power International’ selected Boryeong Thermal Power Plant Units 3 & 4 as the world’s best power plant, and Taean Thermal Power Plant Units 1–4 as the best project, all of which were engineered by KEPCO E&C. In addition, Dangjin Thermal Power Plant Units 1–4 were selected as the world’s best power plants by U.S’s ‘Power Engineering’. The basic design of Israel’s Rutenberg Power Plant, and Canada’s Brooks Power Plant used KEPCO E&C’s engineering technology as a reference.
Major Design Features
Category | Super-Critical Pressure (SC Class) | Ultra Super-Critical Pressure (USC Class) | |
---|---|---|---|
Power Capacity |
500MW(NR) |
519MW(MGR) |
|
Plant Efficiency |
41.1% |
43.5% |
|
Vacuum Degree |
38mmHga |
38mmHga |
|
Operation Mode |
Cyclic Operation and Daily Start&Shutdown(D.S.S) Operation (The Facilities are Equipped with Load Following Function for |
Base and Middle Load Operation(The Facilities are Equipped with Load Following Function for the Smooth System |
|
Boiler |
Type |
Super-Critical Pressure, Once Through, Single Reheating |
Pressure, Once Through, Single Reheating Type, |
Fuel Used |
Bituminous Coal/Diesel (When Starting Up) |
Bituminous Coal/Diesel (When Starting Up) |
|
Steam Condition |
255kg/㎠g, 541℃/541℃ |
255kg/㎠g, 569℃/596℃ |
|
Efficiency |
89.34%(NR) |
90.53(MGR) |
|
Turbine |
Type |
Tandem Compound, HP, IP&LP Turbine, Single Reheat, |
Tandem Compound, HP, IP&LP Turbine, Single Reheat, |
Number of Rotations |
3,600rpm |
3,600rpm |
|
Steam Condition |
246kg/㎠g, 538℃/538℃ |
246kg/㎠g, 566℃/593℃ |
|
Efficiency |
46% |
48% |
|
Generator |
Cylindrical Rotor, Hydrogen and Water Cooled, 3-Phase |
Cylindrical Rotor, Hydrogen and Water Cooled, 3-Phase |
|
Main Transformer |
3 Phase, 2 Windings, FOA (Oil Immersed Forced Oil Cool with Forced Air Cooler) |
33 Phase, 2 Windings, FOA (Oil Immersed Forced Oil Cool |
|
Main Control Unit |
Distributed Digital Control (Functional, Hierarchical |
Distributed Digital Control (Integrated Control and |
-
- Category
- Power Capacity
- Super-Critical Pressure (SC Class)
- 500MW(NR)
- Ultra Super-Critical Pressure (USC Class)
- 519MW(MGR)
-
- Category
- Plant Efficiency
- Super-Critical Pressure (SC Class)
- 41.1%
- Ultra Super-Critical Pressure (USC Class)
- 43.5%
-
- Category
- Vacuum Degree
- Super-Critical Pressure (SC Class)
- 38mmHga
- Ultra Super-Critical Pressure (USC Class)
- 38mmHga
-
- Category
- Operation Mode
- Super-Critical Pressure (SC Class)
- Cyclic Operation and Daily Start&Shutdown(D.S.S) Operation (The Facilities are Equipped with Load Following Function for the Smooth System Operation)
- Ultra Super-Critical Pressure (USC Class)
- Base and Middle Load Operation(The Facilities are Equipped with Load Following Function for the Smooth System Operation)
-
- Category
- Boiler : Type
- Super-Critical Pressure (SC Class)
- Super-Critical Pressure, Once Through, Single Reheating Type, Balanced Draft
- Ultra Super-Critical Pressure (USC Class)
- Pressure, Once Through, Single Reheating Type, Balanced Draft
-
- Category
- Boiler : Fuel Used
- Super-Critical Pressure (SC Class)
- Bituminous Coal/Diesel (When Starting Up)
- Ultra Super-Critical Pressure (USC Class)
- Bituminous Coal/Diesel (When Starting Up)
-
- Category
- Boiler : Steam Condition
- Super-Critical Pressure (SC Class)
- 255kg/㎠g, 541℃/541℃
- Ultra Super-Critical Pressure (USC Class)
- 255kg/㎠g, 569℃/596℃
-
- Category
- Boiler : Efficiency
- Super-Critical Pressure (SC Class)
- 89.34%(NR)
- Ultra Super-Critical Pressure (USC Class)
- 90.53(MGR)
-
- Category
- Turbine : Type
- Super-Critical Pressure (SC Class)
- Tandem Compound, HP, IP&LP Turbine, Single Reheat, Regenerating and Condensing
- Ultra Super-Critical Pressure (USC Class)
- Tandem Compound, HP, IP&LP Turbine, Single Reheat, Regenerating and Condensing
-
- Category
- Turbine : Number of Rotations
- Super-Critical Pressure (SC Class)
- 3,600rpm
- Ultra Super-Critical Pressure (USC Class)
- 3,600rpm
-
- Category
- Turbine : Steam Condition
- Super-Critical Pressure (SC Class)
- 246kg/㎠g, 538℃/538℃
- Ultra Super-Critical Pressure (USC Class)
- 246kg/㎠g, 566℃/593℃
-
- Category
- Turbine : Efficiency
- Super-Critical Pressure (SC Class)
- 46%
- Ultra Super-Critical Pressure (USC Class)
- 48%
-
- Category
- Generator
- Super-Critical Pressure (SC Class)
- Cylindrical Rotor, Hydrogen and Water Cooled, 3-Phase Synchronous
- Ultra Super-Critical Pressure (USC Class)
- Cylindrical Rotor, Hydrogen and Water Cooled, 3-Phase Synchronous
-
- Category
- Main Transformer
- Super-Critical Pressure (SC Class)
- 3 Phase, 2 Windings, FOA (Oil Immersed Forced Oil Cool with Forced Air Cooler)
- Ultra Super-Critical Pressure (USC Class)
- 33 Phase, 2 Windings, FOA (Oil Immersed Forced Oil Cool with Forced Air Cooler)
-
- Category
- Main Control Unit
- Super-Critical Pressure (SC Class)
- Distributed Digital Control (Functional, Hierarchical Distribution)
- Ultra Super-Critical Pressure (USC Class)
- Distributed Digital Control (Integrated Control and Monitoring System)
Schematic Diagram of 500MW Class coal Fired Power Plant

- Use of Super-critical (or Ultra Super-critical) pressure steam with variable pressure operation enables highly efficient operation on all loads
- Installation of high pressure/low pressure By-Pass Valves to reduce startup time, and enhancement of cyclic operation to improve system contribution
- Incorporation of electrostatic precipitator, and higher stack design combined with desulfurization/denitrification facilities to enhance environment-friendliness