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500MW

500MW Class USC Coal Fired Power Plant

500MW picture

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

Major Engineering Data List
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
the Smooth System Operation)

Base and Middle Load Operation(The Facilities are Equipped with Load Following Function for the Smooth System
Operation)

Boiler

Type

Super-Critical Pressure, Once Through, Single Reheating
Type, Balanced Draft

Pressure, Once Through, Single Reheating Type,
Balanced Draft

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,
Regenerating and Condensing

Tandem Compound, HP, IP&LP Turbine, Single Reheat,
Regenerating and Condensing

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
Synchronous

Cylindrical Rotor, Hydrogen and Water Cooled, 3-Phase
Synchronous

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
with Forced Air Cooler)

Main Control Unit

Distributed Digital Control (Functional, Hierarchical
Distribution)

Distributed Digital Control (Integrated Control and
Monitoring System)
  • 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

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