MANJUNG
3 x 700 MW Thermal Power Plant
           Malaysia




                           Power Turbo-Systems
            ...
General Presentation




                           In July 1999, a consortium including
                           Alstom...
Layout
12
                                           1
                                                                   ...
Plant Description - Main Components



                                                    Boiler

                       ...
Turbine

The turbine generator sets have a
rated output corresponding to a
nominal net power of 700 MW and
have a rotating...
Mechanical Equipment


                                                                               Circulating water pu...
Electrical Distribution - Control and Instrumentation


Electrical equipment                     Instrumentation and contr...
Tel. + 33 (0) 1 41 49 20 00 - Fax +33 (0) 1 41 49 24 85 - www.power.alstom.com
ALSTOM Power Centrales - 2, quai Michelet/4...
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Janamanjung

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Janamanjung

  1. 1. MANJUNG 3 x 700 MW Thermal Power Plant Malaysia Power Turbo-Systems Plants
  2. 2. General Presentation In July 1999, a consortium including Alstom Power and Peremba was awarded by TENAGA NASIONAL BERHARD JANAMANJUNG (TNBJ) for the supply of 3 x 700 MW units for the Manjung thermal power plant. Alstom Power was responsible for the design and supply of the civil works of the power block, the equipment, the erection, the commissioning, the training of the operation and maintenance team, the test run and performance guarantee tests. Peremba was responsible for the civil works of the auxiliary buildings, the electrical and control equipment. The coal yard equipment was designed and supplied by Koch. The power station also features an ALSTOM seawater flue gas desulphurisation (FGD) process plant which utilises the natural properties of seawater to absorb the sulphur dioxide from the flue gas. 2
  3. 3. Layout 12 1 The Manjung power plant is located Turbine hall 2 Boiler on a reclaimed island, about 10 km 7 3 Electrostatic precipitators south of the nearest town Lumut, and 4 Stack approximately 288 km north of 5 Electrical building 6 Transformer areas Kuala Lumpur. 7 Switchyard 8 Water treatment plant The power blocks of the 3 units are 1 9 Pumping station 10 Cool yard identical. Their relative position in 11 Fuel oil storage tanks line allows the simultaneous 3 2 12 Main entrance construction of the 3 units. 4 1 3 2 6 Although compact, the design of the 1 power block leaves sufficient 10 5 11 equipment laydown space for the 3 2 maintenance and main overhaul programme of the O & M contractors. The circulating water for the open cooling water circuit is taken from 8 the sea. 9 The high voltage outgoing lines are connected to the 500 kV switchyard substation. 3
  4. 4. Plant Description - Main Components Boiler The boilers of the three units are drum type and controlled circulation tangential firing. They are equipped with economiser, superheater, reheater and low NOx burners. The boilers are designed to burn imported international coals as main fuel on base load. Light fuel oil being used on ignition and for sustaining the flame at low load. Steam generator parameters Life steam flow ................ 2390 t/h Life steam pressure .......... 175 bars abs. Life steam temperature ..... 539°C Feedwater temperature ..... 277°C Fuel ................................ Coal Ignition fuel ..................... Light oil 4
  5. 5. Turbine The turbine generator sets have a rated output corresponding to a nominal net power of 700 MW and have a rotating speed of 3000 rpm. The turbine is of axial flow design with all turbine and generator rotors directly coupled in tandem. The turbine consists of a high pressure (HP) turbine, an intermediate pressure (IP) turbine and two double flow low pressure (LP) turbines. Steam parameters at HP turbine throttle : Standard proven turbine auxilliary Pressure ........................ 175 bar systems are used wherever possible Temperature ................. 540 °C and the STG arrangement follows a at IP cylinder inlet : simple, practical pre-engineered layout. Pressure ........................ 38 bar Temperature ................. 540 °C at LP cylinder inlet : Generator Pressure ........................ 3 bar Temperature .................. 240 °C The generator is a two-pole hydrogen and water cooled machine Generator parameters of the “Gigatop” type. The stator winding and the terminals Nominal rating ............... 943 MVA The rotor winding and the stator are directly water cooled. Power factor ................... 0.85 core are hydrogen cooled. The machine is fitted with the seal Voltage .......................... 23 kV oil, gas cooling and stator water Frequency ....................... 50 Hz cooling systems. Short circuit ratio ............. 0.51 Its excitation is provided by a Efficiency ........................ 98.9 % static excitation connected to the H2 pressure .................... 4 bar gauge slip ring unit. Excitation ....................... Static 5
  6. 6. Mechanical Equipment Circulating water pumps The circulating water system takes cooling water from the sea to the three condensers by means of six 50 % duty concrete volute type main cooling water pumps. Feedwater heating plant The feedwater heating plant includes four LP heaters arranged in series, with LP1 & 2 located in the condenser neck, one feedwater tank equipped with a deaerator and three HP heaters. All the feedwater heating equipment is installed horizontally. Feedwater pumps Steam water loop The feedwater pump system is composed of 3 x 50 % feedwater Condenser main characteristics motor-pump sets, each including : Circulating water temperature ...... 32 °C · a booster pump, Condenser pressure .................... 85 mbar · a main pump, · a variable speed hydraulic coupling, Condensate extraction pumps · a drive motor. Total manometric head ................ 235 mWG Flow rate ................................... 2042 m3/h Condensate extraction pumps Speed ....................................... 1480 rpm The condensate water is drawn from the condenser hotwell by two 100 % motor-pump sets. Each pump is of the multistage, vertical type with barrel. Condenser The condenser is of the single pass, surface type, comprising four titanium tube bundles. Each tube bundle has its own inlet and outlet water box such that the condenser can be considered as two half-condensers of two bundles in parallel. The condenser neck is connected to the LP turbine exhaust box by a suitable flexible bellow. HP heaters 6
  7. 7. Electrical Distribution - Control and Instrumentation Electrical equipment Instrumentation and control The analogue control system mainly includes a load controller for the boiler The electricity produced by the Three units share one common main and feedwater plant, control and generator is transferred to the 500 kV control room. The unit control mode monitoring system for the turbine, grid via a main three-phase core type of the main systems (boiler, turbine, excitation control system for the generator transformer. Isolated phase busbars generator and feedwater plant) is and an energy metering system. ensure the connection between the centralised. generator and the main transformer as well as the tap connection to the The centralised logic control equipment unit transformers. is using ABB control equipment. This is fully programmable electronic equipment. In normal operation, the 11 kV network is supplied by the unit The decentralised control equipment three-phase transformers from the is operated using microprocessors generator 23 kV busbars. and is of the programmable logic controller (PLC) type. Electricity is supplied to the unit auxiliaries at different AC voltages : · High voltage (11 kV) to the main motors, · Medium voltage (3.3 kV) to the medium motors, · Low voltage (415 V) to the small motors, · Low voltage (240 V) to lighting and small power. Four emergency diesel generators automatically supply the essential auxiliaries upon complete loss of AC voltage. Each 220, 110 and 24 V DC system provides a secure power supply for the control and protection of the power plant. Electrical single line diagram 7
  8. 8. Tel. + 33 (0) 1 41 49 20 00 - Fax +33 (0) 1 41 49 24 85 - www.power.alstom.com ALSTOM Power Centrales - 2, quai Michelet/4, avenue André Malraux - 92309 Levallois-Perret Cedex (France) c- “ O ALSTOM - 2000. ALSTOM, the logo ALSTOM and their frameworks are trademarks and service trademark applications of ALSTOM. The other names mentioned, registered or not, are the property of their respective companies. PWER / BPROB / MJGTPP03 / eng / PPB / 06.03 / FR / 4474 - 389 191 982 RCS Paris - Creation by Big Bang Communication - Printed in France - Illustration : ALSTOM Power - All information is given for indication purpose only and is subject to change without notice.

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