BANGLADESH POWER DEVELOPMENT BOARD TENDER ... - BPDB

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4.1.12 Accessoriesa. Temperature detector (Refer to Clause 4.1.10)- normal use :more than 6 (six)-Spare:more than three(3)b. Thermometers and thermocouples at bearing drain of generator andexciter bearings, and at any other location required for operation monitor.c. Pressure gauge at bearing oil feed, and at any other location requiredfor operation.d. Alarm contactse. Spare heaterThe stator shall be equipped with space heater. During the generator stop, thespace heater shall be in service automatically.f. OtherOther instrument, terminal box, hardware buried into the generator foundationand all other necessary accessories for generator.4.2 Exciter And Automatic Voltage Regulator4.2.1 ExciterA complete voltage regulating and excitation system shall be provided. A completeand details description of the proposed system that meets the requirements ofthese specification shall be submitted with the Tender.A shaft mounted brushless type with static type control shall be provided.The excitation system shall match the generator rating and shall maintain thevoltage of the unit within a tolerance of plus and minus 0.5% of rated voltageregulation. The exciter shall have capacity to supply not less than 110% of thefield current required by the generator at rated output, power factor, frequencyand voltage.The rated voltage of the exciter shall be 110% of the machine excitation voltageat the rated output of the machine.The ceiling voltage of the exciter shall not be less than 140% of the matchingexcitation voltage. Insulation of stator and rotor winding of the exciter shall beclass F. A field breaker and discharge resistance shall be provided or alternativelyspecial provisions must be taken to either discharge or suppress excitationfollowing generator fault.The excitation system shall have ample capacity to permit operation throughoutits capability up to over-excitation and under-excitation limit as shown in themanufacturer's capability curves.Ghorasal 200 MW to 300 MW Gas Turbine Peaking Power Plant Project (Vol-2 of 3)36
Over excitation limiter and under excitation limiter shall be provided.4.2.2 Automatic Voltage Regulator (AVR)A quick response continuously acting regulator having a negligible dead-band andcharacteristics enhancing the transient stability of the generator shall be provided.The regulator shall be responsive to the generator line-to-line voltage and shallrestore the exciter output voltage to range of plus / minus 2% of the nominal presetlevel in a response time of less than 50 milliseconds. The accuracy ofcontrolling the AVR shall maintain the generator terminal voltage within plusminus0.5 % of the pre-set value for gradual change of output within the specifiedload range of the machine. It shall have the capability to adjust the generatorvoltage between a minimum of 80% of rated voltage (open circuit) and amaximum of 110%of rated voltage (full load).The regulator shall be equipped with devices which will provide compensating oroverriding signals to the regulator in response to the following conditions.a. Excessive exciter output current in the event of fault in the field circuit.b. Pole slip due to reverse induced field voltages.c. Under excited reactive current in excess of generator capability limitsd. Voltage drop due to generator reactance.e. Dynamic variation of generator output.Manual control shall be provided to set the generator terminal voltage between0% and 110% of the rated voltage.Automatic change-over from Auto to Manual system shall be provided in case ofabnormal/faulty PT Voltage.4.3 11 Kv Generator Switchgear4.3.1 GeneralThe generator circuit breaker shall be provided, and it shall be accommodated inmetal clad switchgear cubicle arranged for local and remote control.The switchgear and the associated equipment shall be fully metal clad andshall comprise:-- Switchgear bus bar- Voltage transformers- Current transformers- Surge protective equipment- Generator circuit breaker- Power fuse switch for station transformers- Cable termination facilities for 11 KV circuitGhorasal 200 MW to 300 MW Gas Turbine Peaking Power Plant Project (Vol-2 of 3)37
Page 2 and 3: Volume - 2Technical RequirementsSec
Page 4 and 5: GHORASAL 200 MW to 300 MW GAS TURBI
Page 6: 2. Scope Of Work2.0 Scope of work2.
Page 9 and 10: 3. Generator switchgeara. Outdoor e
Page 11 and 12: Rated frequency: 50 HzRated nominal
Page 13 and 14: Lighting impulseWithstand voltage(1
Page 15 and 16: h. One (1) Lot Control and instrume
Page 17 and 18: 2.13 TestsThe Contractor shall be r
Page 19 and 20: Section 3Power Plant ArrangementGho
Page 21 and 22: 3.0 Power Plant Arrangement3.1 Gene
Page 23 and 24: 3.3.2.4 Compressor Wet Washing Syst
Page 26 and 27: The distillate fuel oil system shal
Page 28 and 29: 6. Sump tankThe sump tank allows dr
Page 30 and 31: provide necessary protection for ma
Page 32 and 33: 4. Generator And Ancillary Equipmen
Page 34 and 35: 4.1.4 Temperature RiseThe temperatu
Page 38 and 39: - Secondary wiring including cable
Page 40 and 41: 4.3.6 Voltage TransformerThe voltag
Page 42 and 43: 3) The rated service voltage shall
Page 44 and 45: Section 5TransformersGhorasal 200 M
Page 46 and 47: 5. TRANSFORMERS5.1 GENERALThe trans
Page 48 and 49: . The tank shall be of the welded s
Page 50 and 51: The wiring shall be connected at th
Page 52 and 53: 5.3 UNIT AUXILIARY TRANSFORMER5.3.1
Page 54 and 55: h. Anchor devicei. Oil preservation
Page 56 and 57: 6. 230 kV OUTDOOR SWITCHGEAR, EQUIP
Page 58 and 59: -Power frequency withstand voltage(
Page 60 and 61: eaker.(6) Dielectric Test Voltagea.
Page 62 and 63: . Rated insulation level- Lighting
Page 64 and 65: f. Unless otherwise specified, the
Page 66 and 67: 6.3.2 DESIGN CRITERIAThe steel stru
Page 68 and 69: 6.4 INSULATORS AND WIRING MATERIALS
Page 70 and 71: Section 76.6 Kv SwitchgearAndLow Te
Page 72 and 73: 7. 6.6 kV SWITCHGEAR AND LOW TENSIO
Page 74 and 75: - Number of circuit :Determined by
Page 76 and 77: Section 8Control And ProtectionGhor
Page 78 and 79: 8. CONTROL AND PROTECTION EQUIPMENT
Page 80 and 81: - Automatic synchronising equipment
Page 82 and 83: ee. AVR failure xff. Emergency Trip
Page 84 and 85: can be seen through the window with
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Required no. of 6.6 kV and 415 V vo
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8.10.3 CONTROL EQUIPMENT(1) Transmi
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The test block shall be of the back
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Section 9Cabling And GroundingGhora
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9. CABLING AND GROUNDING9.1 GENERAL
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9.2.4 CONTROL AND INSTRUMENT CABLES
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9.4 CABLE ERECTIONConcrete lined ca
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Section 10DC Power Supply SystemGho
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10 DC POWER SUPPLY SYSTEM10.1 BATTE
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float charge as well as boost charg
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Section 11Lighting And Small Power
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11. LIGHTING AND SMALL POWER SUPPLY
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(ii)Three phase plug socketOutdoor-
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Section 12Fuel Handling FacilitiesG
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12. FUEL OIL SYSTEM AND HANDLING FA
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from unloading base to the fuel tan
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13. FIRE PROTECTION FACILITIES13.1
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System of lock off to (but not exit
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Section 14Communication FacilitiesG
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14. COMMUNICATION FACILITIES14.1 GE
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(2) General CommunicationWhen the o
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(1) BatteryType of batteryCapacityN
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15. MAINTENANCE FACILITIESPage15.1
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15.1.4 RATINGThe rating of the cran
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The main power supply shall have a
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Static tests of all automatic seque
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Section 16Tests And InspectionsGhor
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16 TESTS AND INSPECTIONS16.1 GENERA
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subjected to the following tests by
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c. Stranded Conductors for Overhead
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days from the receipt of the said n
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circuit of unit motor control centr
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Special measures may have to be tak
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Checks shall be made of the local a
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Section 17Civil WorksGhorasal 200 M
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17.9 Sewage Works17.9.1 General17.9
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17.1.4 SITE LABORATORYThe Contracto
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where directed by the Board extra s
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approval regarding the re-measureme
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igidly in position down to the lowe
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on piles together with the apparatu
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than 15 cm in size containing suita
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aggregates shall be washed prior to
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17.6.13 FORMWORK AND TIMBERINGFormw
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he Contractor shall repair at his o
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Sieve designationPercentage by(Squa
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(b) Transverse Joints: The transver
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17.7.2 Gravel SurfacingThe Contract
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extended with sufficient number of
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A written record of the drilling in
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) Control EquipmentThe control equi
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17.12.2 GatesSliding metal gates of
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18 Building WORKS18.1 General18.1.1
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18.1.4 RecordsThe Contractor shall
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FrameRoofExterior wallPartition wal
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18.5 Materials And Workmanship18.5.
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(7) PaintPrior to delivery after sh
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oof cladding shall be less than 1.1
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. Wooden doorsPlywood for panelThic
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The terrazzo is to be trowelled to
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to suit. Stud shall be formed of ap
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Section 19Spare PartsGhorasal 200 M
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19. SPARE PARTS19.1 GENERALThe Cont
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BACKGROUND INFORMATION:Bangladesh P
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- Overhauling of all electrical mot
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3. BASIS OF PRICE3.1 Basis of price
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the delayed services or such other
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13. GENERAL CLAUSES CONCERNING TERM
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17. INSURANCEThe insurance includin
Page 224:
Appendixes20.1 Site Layout20.2 Grid
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BANGLADESH POWER DEVELOPMENT BOARD TENDER ... - BPDB

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