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Design of Control System for Small Scale Condensing Type Geothermal Power Plant 

Riza, Nugroho Adi Sasongko, Anton Rahmawan, Teddy Lubis, Tsani Hendro, Suyanto, Taufan Surana The Agency for The Assessment and Application of Technology (BPPT) riza68@webmail.bppt.go.id. Design of Control System for Small Scale Condensing Type Geothermal Power Plant . Outline. Background

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Design of Control System for Small Scale Condensing Type Geothermal Power Plant 

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  1. Riza, Nugroho Adi Sasongko, Anton Rahmawan, Teddy Lubis, Tsani Hendro, Suyanto, Taufan Surana The Agency for The Assessment and Application of Technology (BPPT)riza68@webmail.bppt.go.id Design of Control System for Small Scale Condensing Type Geothermal Power Plant 

  2. Outline • Background • Objective • Desain of Small Scale Geothermal Power Plant: • Basic parameter for design • Control System Configuration • SCADA system • Steam Turbine and Generator • Conclusion

  3. Background • Utilization of geothermal potential of small-scale (low-medium enthalpy) in Indonesia is necessary and urgent to do • Accelerated development program has set a 10,000 MW power plant to the stage-1 which is the contribution of geothermal power plants is 3967 MW • To achieve the target, utilization of the small-scale geothermal potential resources is very necessary

  4. Objective • To develop the control systems for small scale condensing type 3 MW geothermal power plant.

  5. Basic Parameter & Characteristics

  6. Process Flow Diagram

  7. Control System Configuration • Redundant CPU • Number of I/O approx. 400 I/Os • Field Instrument connected to PLC via junction box

  8. Instrumentation • Control Valve (10 units, Modulated & on-off type) • Flow Meter (5 units) • Level Sensor (5 units) • Pressure Transmitter (20 Units) • Differential Pressure Transmitter (3 units) • Pressure Switch (4 units • Temperature Transmitter (32 units) • Speed Sensor (3 units)

  9. Control System Configuration

  10. Turbine Control • Woodward Speed Control 2301D-ST • Governor Hydraulic Amplifier (Woodward 89007) collaborated with Control Valve • Speed Sensor (3 units) : • To Local Panel • To SCADA • To PLC

  11. SCADA System • 24 pages SCADA : • Overview • Well • Separator • Condenser • Steam ejector • Cooling system • Reinjection system • Raw water • Fire water system • Chemical Dosing • Steam Turbine • Generator • Alarm list • Trending • Plant Performance Indicator

  12. SCADA SystemOverall System

  13. SCADA SystemCooling Tower

  14. SCADA SystemTurbine & Condenser

  15. Steam Turbine and Generator 3MW Generator Turbine Gearbox Skid Oil Cooler

  16. Steam Turbine and Generator Data

  17. Overall Single Line Diagram • Inter-connected with 20 kV distribution system • 2 auxiliary feeders : • Essential load • Non Essential load • All of CB status will be monitored Auxiliary Transformer Step up transformer 3MW Generator Auxiliary Load

  18. Current Development Status • Generator • Turbine • STG Skid & Gearbox

  19. Conclusion • Small Scale Geothermal Power Plant is very important for the development of renewable energy in indonesia, especially in the eastern part since there are a lot of potential geothermal sources to replace the diesel generator. • Control system for the 3 MW condensing type geothermal power plant has been developed. • The proposed control system has number of instruments (PT, TT and FT) bigger than the conventional system at the same capacity because of the neccesity of more detail acquisition data for analysis and research purposes. • Step by step partial testing such as data connection test, point to point testing and loop tes have already done and confirmed. The SSGPS is under construction and will be in operation by the end of this year.

  20. Thank You Illustration of 3 MW Small Scale Condensing Type Geothermal Power Plant

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