AVR_BPK4 SPECIFICATIONS_21_02_57
Contents
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10. 7 1 2 28 7 2 Excitation Control 7 3 Specification Catalogue Excitation Control Excitation Control 8 8 1
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17. 10 4 Specification of Excitation System for Bang Pakong Power Plant BPK C41 42 5 NWA Main Power Supply Ground
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20. 150 8 2 Excitation Control Commissioning Start up test BPK C41 BPK C42 20 7 9
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24. Excitation Control 41 42 1 3 4 Excitation Control Digital Type 2 Spare Part 1 Excitation Control Excitation Control Interface
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26. Specification of Excitation System for Bang Pakong Power Plant BPK C41 42 10 1 40 10 Scope of Supply Specification of Excitation System for Bang Pakong Power Plant BPK C41 42 2 40 Trial run 12 3 Trial run Specification of Excitation System for Bang Pakong Power Plant BPK C41 42 30 3 20
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28. Excitation Control 3 14 A 2 Ex lt itati 100 MW Lo 3 15 Ex lt itatio Hardware amp Software 3 16 Excitation 10 3 17 Ex lt itati
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33. 6 a y A 4 28 SPECIFICATION OF EXCITATION SYSTEM FOR BANG PAKONG POWER PLANT BPK C41 42 1 Introduction The Bang Pakong Power Plant is located at 4 Moo 6 Tha Kham Kasemjatikavanij Road Bang Pakong District Chachoengsao Province 24130 It has been defined commercial operation date COD since 1990 The plant consists of two combined cycle blocks each block is based on two 104 MW gas turbine generators at 32 C site condition ambient temperature each and one 106 MW steam turbine generator All equipment has been completed installation since 1990 and they will be 24 years old Past history of maintenance the excitation control systems have frequent errors and higher tendency The problems may be caused by the deterioration of the equipments especially by electronic equipments as shown in the result of inspection report With the obsolescent such parts of Excitation control system The Electricity Generating Au
34. Final Document Training Pending 11 2 System Documentation 15 Training course Specification of Excitation System for Bang Pakong Power Plant BPK C41 42 11 11 1 8 8 1 0 1 11 2 8 8 2 0 1 10 12
35. 6 6 During Operational shutdown the field current shall be decreased by inverter operation of thyristor to provide AC field circuit interrupt at minimum load 6 7 For safety reason the de excitation circuit shall be provided and designed to act independently from power convert and regulator The de energizing of synchronous generator with exciter shall be effected by opening the field circuit with a de excitation device Proper precautions shall prevent voltage peaks during the de energizing process as well as transient voltages caused by short circuits of the generator rotor Furthermore the duration of the de energizing process must be reduced to minimum 6 8 The regulator and excitation cubicle shall be provided an effective cooling of all electronic devices Cooling of the regulator and excitation cubicle shall be forced air cooling by fans which ambient air draw from the room through air filter at floor level and exhausted on the top of compartment 6 9 The regulator cubicle and the excitation cubicle shall be designed to fit with the existing excitation compartment 6 10 All devices of regulator and excitation cubicle shall be operated at ambient temperature more than 40 C 6 11 The existing excitation transformer will be retained and the new excitation system shall be designed to interface with this transformer 6 12 The manual or field current control function shall have an electronic operated voltage adjusting device for control of fie
36. 2 41 42 3 3 1 1 3 2
37. by selector switches or local control panel at regulator cubicle 7 9 The excitation system shall be provided the following additional compensating limiting and protective functions Line drop compensation with the adjustment range of 20 Reactive droop compensation with the adjustment range of 20 Maximum field current limiter function matching to thermal loading capability of the field winding of the generator Under excitation limit or load angle limiter function for under excited load region operation to ensure stability of operation Volts hertz limiter function is used to prevent overheating that may arise from excessive magnetic flux due to under frequency operation or over voltage operation or both Power system stabilizer tuned to provide a good damping at power system frequencies associated with local and inter area mode of oscillations Generator field circuit ground fault protection initiating an alarm and a trip signal for unit shutdown Loss of sensing voltage protection function initiating changeover to manual control Automatic tracking between automatic control and manual control Automatic tracking between master and standby control regulator Soft start function is provided to prevent over shooting of generator voltage when the 11 28 excitation system is started to control Field over voltage protection circuit Rotor temperature monitoring alarm and trip Loss of firing pulse mon
38. calculated variable Digital Point Any contact input contact output or calculated variable Schematic diagram A diagram that represents a system using graphic symbols rather than realistic pictures The diagram is often used to represent information without unnecessary visual clutter The symbols used in the diagram are arranged in a way that can be easily interpreted by the user Circuit diagram A simplified conventional graphical representation of an electrical circuit It shows the actual wire connections being used using simple images of components Abbreviations AVR Automatic Voltage Regulator CT Current Transformer PT Potential Transformer MCR Maximum Continuous Rating PPT Excite Transformer SWC Surge Withstand Capabilities O amp M Operation and Maintenance 6 28 CPU Central Processor Unit DCS Distributed Control System LCD Liquid Cristal Display EEPROM Nonvolatile electrically re programmable OEL Over excitation limiter UEL Under excitation or rotor angle limiter VO Input Output Al Analog Input AO Analog Output DI Digital Input DO Digital Output 5 Essential Technical Requirements 5 1 Reliability and Availability The proposed system shall be provided redundancy for critical part of the system It shall also provide on line self diagnostics for quick analysis of system problem areas The system and equipments in
39. drawing including card slot assignments and cabinet layout drawing Equipment components interconnection diagrams Cabinet internal arrangement and power distribution drawings External I O connection drawings Power distribution drawing After finished of FAT the Bidder shall provide the FAT report within 15 days The Bidder shall submit the Site Acceptance Test SAT procedure documentation within 60 days before plant shutdown for EGAT approval The Bidder shall provide the following documents with the shipment of equipment after finished of FAT Bill of Material System Diagram Control Logic Diagrams and or program listings for construction All Outline Drawings VO connection Drawings Power Distribution Diagram Completed Maintenance Instruction Manual Completed Operation Instruction Manual After 24 Hours Operation Test the Bidder shall provide the Site Acceptance Test report within 7 days After 24 Hours Operation Test the Bidder shall provide the final documentations as the follows within 30 days System diagram Equipment outline drawings dimension drawings Equipment location drawing including card slot assignments and cabinet layout drawing Equipment components interconnection diagrams Cabinet internal arrangement and power distribution drawings Power distribution diagram Bidder manufactured equipment components including schematic diagrams down to components level components layouts and parts
40. lists Hardware and software product instructions and specifications VO connection Drawings 17 28 Control Logic Diagrams and or program listings for construction Schematic diagram of hardware and block diagram Schematic diagram of software control logic and block diagram Schematic diagram of the excitation cubicle internal wiring and interface wiring with local equipments The Bidder shall provides the final all configuration drawings and diagrams on paper size A3 297 x 420 mm and on CD ROM The final documentation will reflect the as built status of the system The requirements for documentation shall be supplied for all hardware and software of the latest version being used by the proposed system The Bidder shall be deliver 5 five sets of the following standard reference documentation in English language and 5 five sets of electronic documentation 11 3 Programming Reference Documentation shall be assembled to assist the EGAT s personnel in software development and maintenance This documentation shall include descriptions of all programming languages program user s guides editors and utilities supported by the proposed system User manual shall be supplied for each plant unit by the Bidder to be used by the operators This manual shall include detailed descriptions of all proposed system functions including operator action and system response for all functions 11 4 System Troubleshooting Guide Do
41. repairs and modifications as necessary to bring each item listed below into compliance with the performance guarantees Subsequent to those modifications the performance tests shall be repeated at the Contractor s expense where expenses shall include all charges incurred during retesting include all fuel cost which supply by EGAT The performance tests shall demonstrate that the requirements of the specification are met At least the performance tests shall be of NO LOAD Soft Start Test Step Response Test Changeover Function such as auto mode CH A to manual mode CH A manual mode CH A to auto mode CH A auto mode CH A to auto mode CH B auto mode CH B to auto mode CH A auto mode CH B to manual mode CH B manual mode CH B to auto mode CH B Power Thyristor Bridge Change over Over fluxing Limiter test V Hz ON LOAD Step Response test Over Excite Limiter test Under Excite Limiter test Reactive Power Rejection test PSS Tuning 12 2 6 24 Hours Operation Tests The 24 hours operation tests shall be run continuously after complete of the control performance and limiter function tests The tests shall be rerun if any trip or derate occurs Upon agreement by EGAT that the plant is ready for regular electricity generation service EGAT will operate the unit for 24 hours at the guaranteed maximum load The test shall be considered successful if no derates or unit trips occur 12 3 Trial Run Test After successful completion of the
42. 24 Hours operation test the plant will be required to operate in commercial service for a period of 30 days under the working conditions of the power plant dispatchable load conditions determined by EGAT without failure or interruption of any kind resulting from defect of plant equipment or materials supplied under this Contract The plant will be operated by EGAT during the Reliability Test period The Contractor may request permission to carry out any minor adjustments which may be necessary provided that such adjustments do not result in reduced output or efficiency 22 28 If any failure or interruption occurs in any portion of the plant which results in reduced plant capacity or availability due to or arising from faulty design materials workmanship but not otherwise sufficient to prevent full us of the plant the Reliability Test shall be terminated and recommenced from the beginning after the Contractor has remedied the cause of defect Defects due to causes other than faulty design materials or workmanship shall be demonstrated by the Contractor In accordance with the provisions of the contract the commercial operation will start on the date which the 30 days Reliability Tests were successfully completed and the Warranty Period shall begin on the next day During the Warranty Period EGAT shall operate the plant and perform routine maintenance The Contractor shall be responsible for performing repairs adjustments and correction o
43. ance and modification and software shall be the latest version of products All manual documents and diagrams maintenance manual internal circuit diagram printed circuit layout etc shall be provided 13 3 Each tool shall be new and marked with its size and or purpose All tools shall be suitably arranged in toolboxes except where otherwise specified A list of the tools contained stamped on an attached metal tab shall be included 14 Spare Parts 14 1 Requirement Spare Parts The Contractor shall supply 1 set of spare parts as below listed All spare parts shall be identical electrically and mechanically to the corresponding parts in the equipment and shall be suitably packed and clearly marked ready for long term storage indoors Spare parts for the digital controller shall be pre programmed for the unit operation List of Spare Parts Quantities Description 1 Graphical LCD operation panel 1 Set of each kind of electronic modules 1 Set of each kind of power supply modules 2 Set of each kind of transducers 6 Thyristor DC fuses 1 Set of Thyristor bridge rectifier 1 Set of each type of cooling fan Lot 10 or at least 2 of each type of magnetic relays and contactors 1 Set of de excitation circuit 1 Set of field circuit over voltage protective device 1 Set of field flashing breaker 31 24 28 14 2 Recommended Spare Parts The proposed system shall be guaranteed the continued availability of spare major components or funct
44. ave a resolution of 1 msec The precision of voltage sensing signals shall be 0 05 The design shall be fail safe and redundant as required to give high reliability 6 2 The continuous current rating of the excitation system shall be allowed generator operating at rated MVA and within 10 of rated terminal voltage 6 3 The excitation system shall be capable of providing a ceiling current to the field winding of main generator not less than 1 6 times of rated current for at least 30 seconds 6 4 The rectifiers shall be a three phase full wave thyristor converter and shall have sufficient capacity high efficiency and stable characteristic In the event of one of rectifier failure another rectifier should have sufficient current capacity for rated reactive power of generator Each set of 8 28 rectifier shall be provided following equipment Thyristors with suitable heat sinks Fast acting current limit fuses coordinated with the thyristor I2 t and provides each thyristors Snubber circuits AC Filter circuits Surge absorber circuits Detecting circuit for the loss of thyristor current conduction due to a blown fuse Detecting circuit for open or shorted thyristor gate or fault of firing circuits Cooling equipment including fans and loss of fan indicators 6 5 AC field circuit breaker with de excite system For interrupting the field circuit the contactor must immediately open by any interrupt or external trip signal
45. ce function Maintenance software of controller in English language Accessories of the programming unit Operation maintenance and instruction manuals of controller both hardware and software in English language Schematic diagram of hardware and block diagram Schematic diagram of software control logic and block diagram Schematic diagram of excitation cubicle internal wiring Excitation System cubicle amp panel layout drawing 7 Control and System Functions This section gives the Bidder an overview of the system criteria and functions required to control and monitor the power plant under all conditions 7 1 The system shall be designed for automatic and manual control with PID type characteristic 7 2 The automatic control shall be regulated generator voltage over range from 90 to 110 of rated value and maintain the generator terminal voltage within the normal regulation of 0 5 or less of rated generator voltage according to the reference value of generator voltage adjusted during operation The automatic voltage adjuster device shall be linearly controlled over this range and shall be electronic operated without moving part 10 28 7 3 The manual control shall be regulated generator field current over range from nearly 0 to 110 of rated value The manual adjuster device shall be linearly controlled over this range and shall be electronic operated without moving part 7 4 The manual and automatic adjuster d
46. cluding controllers and control loops shall be designed such that in case of a hardware or software failure the capability to continue ful automatic and or Mmanual control over the plant unit without upset and with adequate operator interfacing to continue operation for an extended period of time shall be retained The operator shal be alerted to operate when a redundant system failure communication component failures and the corrective action shall be taken before the operation or safety of the generating unit is affected System diagnostic protection and switch over shall be designed to eliminate realistically predictable common mode failures on redundant components Also the monitoring system shall be used to alert the operator of a system failure and shall not be cluttered with alarms such as quality checks for information inputs that do not deserve immediately attention 5 2 Maintainability The electronic modules and other components of the proposed system shall be plug in construction Any module shall be easily removed from the system and replaced without breaking or making solder type connection The Bidder shall state in this proposal that the diagnostic programs all necessary maintenance tools shall be provided to ensure that EGAT s personnel will accomplish maintenance work of all hardware and software of the proposed system System maintenance procedures shall be simple straightforward and well documented 1 28 6 System Design an
47. cumentation shall be developed to assist the EGAT s personnel in analyzing system failure Documentation shall include but not be limited to procedures to follow after a system failure to isolate errors locations of pertinent operating system parameters for automatic restarts and a list of errors that cause system failure 12 System Testing and Support A complete set of test shall be conducted in accordance with the following requirement to determine the performance guarantees of the proposed system Detail test procedure and schedule shall be prepared by the Contractor and shall be accepted by EGAT prior to the conductance of each test The proposed system testing shall consist of factory acceptance test site acceptance test control performance and limiter function test and trial run test The Contractor shall be responsible for all expenses during the factory acceptance test site acceptance test performance test re performance test for the parts related to correction and during the warranty period to correct modify or replace parts or the whole system to the satisfaction of EGAT in and of the following cases The proposed system cannot perform properly functions due to any limitations without stated by the Contractor Due to any limitations bellow the ones stated by the Contractor and accepted by EGAT 18 28 If any other abnormalities or malfunctions affect to the availability or reliability of the plant or the system all tes
48. d Architecture AC REG Scope of supply PPT SS Excite Transformer 1 CT i POWER RECTIFIER GENERATOR l oS 7 Saat Ns alr E Ge I i DC REG I 1 1 I 1 I Potential Source Excitation System Block Diagram 6 1 The excitation controller shall be the redundant digital type unit with the separated control software and hardware for example independent CPUs power supply units digital input output analog input output firing pulse control and firing pulse output and necessaries The minimum requirements for the excitation controller are The high speed Central Processor Unit CPU shall be at least 16 bit design with redundant processor system Communication ports shall be provided adequately to support communication with the human machine interface HMI equipment programming tool data logger or printer Slave time clock shall be included to interface with the real time clock of the HMI equipment 2 two Graphical LCD operation panel for controlling and monitoring at local control panel and gas turbine control room Nonvolatile electrically re programmable EEPROM or flash memory shall be used for the operating system and the normally executed control program Analog process variables shall be converted in minimum of 12 bit resolution and they shall have a resolution of 1 msec Discrete input signals shall h
49. ded alarm signals to gas turbine control system in the gas turbine control room Over excitation limiter OEL active Under excitation or rotor angle limiter UEL active Armature current limiter active Volts hertz limiter active Volts hertz trip Loss of AVR supply voltage Loss of AVR sensing voltage Thyristor fuse blown Firing pulse failure Generator field ground alarm Generator field ground trip Cooling fan failure AVR in trouble Rotor over temperature alarm Rotor over temperature trip Auto manual Mode 14 28 The excitation system should permit these currents to flow 10 2 Excitation Control system Cubicles 10 2 1 The power rectifiers rectifier protection firing and control equipment field breaker and the digital voltage regulator shall be housed in an assembly of sheet steel cubicles The electronic section Control unit of the exciter shall be located in a separate cubicle from the main cubicle Power unit These cubicles shall be indoor type designed for ventilated construction and shall be complete with steel channel sills and hinged doors for convenient servicing The doors of all cubicles shall be open both side front and rear 10 2 2 The housing partitions etc shall be fabricated from 2 mm metallic materials as required in such a manner that the complete structure shall be rigid self supporting and free from magnetic heating or vibration twist and weave Each cubicle shall be provided with a channel base f
50. e proper functioning of all hardware h Demonstration of all man machine interface functions i Demonstration of graphics permissive displays trends and bar charts j Demonstration of the system maintaining constant duty cycle under all conditions k The Contractor shall guarantee and simulate that no system failure of any type will occur under any plant upset conditions such as blackouts unit load rejections etc DV Demonstration of alarm printing storage and buffer size m Demonstration of the proper functioning of the Contractor supplied software All system hardware and software shall be investigated by EGAT s personnel during factory acceptance test Following the test if in the opinion of EGAT The system has not been adequately manufactured tested or debugged the test shall be rerun The system shall not be shipped to the job site without the EGAT s approval The summary reports of the factory acceptance test shall be documented and submitted to EGAT by fifteen 15 days after finished of the tests without major items It is the full responsibility of the Contractor to clearly specify in detail all system s hardware and software design and operational limitations at the design review stage the conditions or maximum limitation that the system in designed for and cannot be operated beyond All limitations shall be again listed and included as part of the factory acceptance test procedures mentioned above The system wi
51. evices 70E and 90R shall be controlled by RAISE and LOWER control switches or push buttons at local control cubicle remote control panel in gas turbine control room and DCS system The automatic adjuster devices shall be controlled by automatic synchronizing system 7 5 In the event of the automatic control failure the control system shall be changeover automatically from Automatic to Manual control mode and shall not affect appreciable change in generator field current When the automatic control is available the changeover from manual to automatic voltage control shall be performed manually without any disturbances with the generator field current Automatic Manual changeover shall be operated by selector switches or push buttons at the regulator cubicle and by remote control panel in gas turbine control room and DCS system 7 6 The automatic changeover mechanism in the redundant control system shall be provided for the case of the master control channel failed the slave control channel shall be changeover automatically to take the voltage control and vice versa The changeover shall not affect an appreciable change in generator field current 7 7 The excitation system ON OFF operation shall be operated by control switches or push buttons at regulator cubicle and by remote controlled signals from remote control in gas turbine control room and the DCS system 7 8 The excitation system Local Remote operation shall be operated
52. f defects under the provisions of the Warranty 12 4 Field Support EGAT will provide operating personnel during start up The Contractor shall provide all other personnel as defined herein and as required to complete the installation calibration loop tests function tests start up tests control performance and limiter function tests and trial run test in accordance with the project schedule The Contractor shall provide EGAT with the names and qualifications of prospective site manager and technical advisors for this project Personnel provided by the Contractor shall include but not be limited to the following classifications 12 5 Contractor Site Manager The Contractor s site manager shall organize the contractor s staff and work control in accordance with the project schedule EGAT expects the Contractor s site manager to have the authority to make all commercial decisions The Contractor s site manager has to attend the daily Excitation System renovation site work coordination meeting which be conducted by EGAT s personnel during the site work The Contractor s site manager shall report the daily work progressive according the site work schedule In case of works are delay from the schedule the Contractor s site manager shall propose the recovery plan 12 6 Technical Supervisors The Technical Supervisors shall co ordinate technical support required for specific questions related to formatting of displays and configura
53. hall be performed by the contractor The contractor shall coordinate the works to be executed by EGAT 10 Scope of Supply The contractor shall supply new Excitation System for one 1 unit each consisting of the following Quantities Description 1 set Regulator cubicle consisting of dual channel digital type voltage regulator power supply units instrumentation and indicating devices local control unit and auxiliary devices etc 1 set Excitation cubicle consisting of rectifier units a AC field circuit breaker 41 generator rotor ground detector 64E field flashing equipment 31 instrumentation and indicating devices local control unit and auxiliary devices etc 2 set Graphical LCD operation panel for controlling and monitoring 1 lot Programming tools completed with software hardware firmware accessories Drawings and O amp M manuals that adequate for installation operation and maintenance etc 1 set Requirement Spare parts 1 set Special tools and special lifting attachments which may be necessary or convenient for assembling dismantling and maintaining the excitation system contractor shall be provided 1 lot Power Cable for interconnection between the rectifiers and the collector rings etc 1 set Interface installation equipments and accessories to complete for excitation system 10 1 Control devices Instrumentation and Indication 10 1 1 The following Excitation System selector switches in local control
54. ionally compatible major components for all standard products supplied for a period of ten 10 years The Bidder shall provide an itemized list of recommended spare parts for two 2 years of operation and the price shall be valid on this project price 15 Training Course The Contractor shall provide the training classes in Thailand for combining classroom presentation and on the job training for operation course twelve operators at least three days and twelve 12 maintenance course two batches six 6 engineers for each batch at least five days for each batch Contractor shall provide training equipment The course outlines shall cover all operator functions maintenance and engineering for the proposed system The course outlines length of time for each topic and state requirements for classrooms and other facilities shall be submitted with the proposal All costs for the training program are included in the Bid Price 25 28 1 1 1 1 1 1 1 2 1 1 1 4
55. itoring All other protection supplied shall be subject to acceptance by the EGAT This includes thermal overloads on the generator field bus AC and DC over voltages cooling equipment failure over temperatures on components of the equipment and all other thermal electrical and mechanical protection necessary by nature of the equipment or mentioned herein 8 Technical Data of the Existing Equipment 8 1 Generator Capacity 128 600 kVA Voltage 11 500 Volt Power Factor 0 85 Armature current 6 456 Amp No load field current 440 Amp Field current 1 158 Amp Full Load Field voltage 455 Volt Number of phase 3 Number of pole 2 Revolution 3 000 rom Maximum Continuous Rating MCR 8 2 Excite Transformer PPT Dry Type Capacity 1 041 kVA Primary voltage 11 500 Volt Secondary Voltage 550 Volt Primary Current 52 3 Amp Secondary Current 1 093 Amp Impedance 6 BIL 95 kV Class Insulation H Frequency 50 Hz Vector Group Yd1 8 3 Potential Transformer PT 12 kV 120 volt 8 4 Current Transformer CT 10 kA 5 Amp 9 Scopes of works 9 1 Works and Materials supplied by the Contractor 9 1 1 The scope of works to be performed under this specification shall comprise but not be 12 28 limited to design manufacture supply special tools shop testing delivery field testing and commissioning etc 9 1 2 Work for dismantling Installation of equipment s
56. ld current from near zero to rated value This control shall be principally for use during installation checks commissioning maintenance and emergency operation Equipment for auto or manual follow up with the automatic voltage setting device shall be provided for auto transfer from auto to manual control 6 13 Redundant power supplies with status monitoring display for the voltage regulator normally supply from 125 Vdc station battery and back up power supply 110 V 50 Hz single phase 9 28 6 14 The graphical LCD operation panel key pad or touch screen with LCD display for local control and maintenance or testing shall be supplied and installed on front panel of regulator cubicle and gas turbine control room 6 15 The digital controller shall have a utility feature as follows Trending Real Time the following feature shall be provided at least 2 free selectable signals resolution at least 5 msec scan record duration up to 24 hours saving and reloading of trending Data logger the following feature shall be provided at least 6 free selectable signals resolution 5 msec scan or less record duration up to 100 min saving and reloading of trending Event Record the following feature shall be provided scan rate 50 msec or less event capacity up to 100 events 6 16 Following accessories shall be provided with the new Excitation System Programming tool with the latest version software for upload download and maintenan
57. lied in this specification The tests shall prove the compatibility of the Excitation System when operated with the existing generators and shall show that all requirements have been met 12 2 1 Inspection The Contractor shall inspect the installed systems and equipment prior to starting calibration and checkout and shall correct all deficiencies that could prevent proper check out of such equipment and systems as noted herein 12 2 2 Signal Loop Checks After completed of the Excitation System installation inspection the Contractor shall perform signal loop checks to verify the signal flow and data processing function for all Excitation System input output signals from field instrument to Excitation System The Contractor shall perform final loop checks by performing a three check point 0 50 100 for analog signals and status changed for digital signals through the control system 12 2 3 Function Tests After completion of signal loop checks control loop checking shall be performed in conjunction with the function tests and as directed by the Contractor s start up engineer Function tests shall include but not be limited to the following Control loop checking and verification of electronic control loops Control loop checking and verification of plant interlock circuits including programmable logic control panel hardware process permissive output devices and annunciation Control loop checking and verification of plant a
58. ll not be accepted if in the option of EGAT the system has not been adequately designed to fulfill this bidding requirement or the industry standards 12 2 Site Acceptance Tests SAT The Contractor shall conduct the site acceptance for the Excitation System and the other system as specified in this specification The Contractor shall submit the test procedure and schedule for EGAT approval as early within sixty 60 days before start of the SAT The SAT shall be completed no major pending items before the end of plant outage duration which be determined by EGAT The pending items of SAT must be fixed by the contractor within 30 days after 24 hours operation test The Contractor shall submit detailed site acceptance test procedures and complete test formats to EGAT for approval The summary reports of all tests included with the control performance and limiter function tests shall be documented and submitted to EGAT The Contractor shall mobilize the start up engineer to conduct these tests The procedural requirements shall include but not be limited to the following 20 28 The Contractor shall supervise field inspections and tests and in accordance with the latest issue of the applicable standards Complete tests shall be performed on site under supervision by the Contractor to check the sequence of operation and to optimize performance of each item of equipment during all normal and abnormal operating conditions mentioned specifically or imp
59. nalog signals e All protection systems checking Excitation Trip by Function Lock out Trip cause of Excitation Control Trip Excitation Trip by 86G etc 12 2 4 Plant Start up Tests The overall start up sequence and logic shall be developed by the Contractor so that subsystem start up packages are completed and presented to EGAT in proper sequence to support an orderly startup Startup activities shall be coordinated through EGAT s staff Each subsystem start up package shall be presented to EGAT for review and acceptance prior to initial operation After this review and acceptance EGAT will energize and operate the equipment for the first time as a total operating functional element with the Contractor s Start up Manager present The operation of required support elements for this startup activity will be performed by EGAT EGAT s acceptance will be for initial operation only and shall not relieve or end the contractual obligation of the Contractor The final tuning shall be done during plant start up test 12 2 5 Control Performance and Limiter Function Test 21 28 A complete functional test of the unit shall be performed by the Contractor and witnessed by the EGAT to verify compliance with the performance guarantees contained herein The tests shall be a one time test and shall be conducted as soon as practicable following the completion of system tuning In the event of a failed performance test the Contractor shall at his expense make
60. ng and testing all software programs including software licensing if required A set of maintenance software programs shall also be provided to perform on line and off line diagnostic functions for both the hardware and software The Bidder shall furnish for each software package a back up copy of all programs contained in the package on a permanent storage medium compatible with the medium drive of the equipment which the software will be loaded The backup copies shall be delivered to the job site at the time of powering up the systems by the Bidder One extra copy of all programs shall be retained by the Bidder at his factory The final copy and backup copy of the completed software shall be handed over to EGAT after completing all tuning and site tests 11 2 System Documentation After contract award the Bidder shall provide the detail project schedule within 15 days for EGAT approval After contract award the Bidder shall provide all documentations as follows within 30 days for EGAT approval System diagram Logic diagram Interconnection diagram Wiring diagram 16 28 Lay out of cubicle and equipment The Bidder shall provide all documentations as follows within 30 days before Factory Acceptance Test FAT for EGAT approval FAT procedures VO list Hard copy of process graphic displays Parts lists Drawing for construction Equipment outline drawings dimension drawings and power consumption Equipment location
61. panel shall be mounted on the regulator cubicle Raise Lower Automatic adjuster device Raise Lower Manual adjuster device Automatic Manual changeover ON OFF excitation system Local Remote excitation system 10 1 2 The regulator cubicle shall be provided following instrument signal monitoring Generator voltage 13 28 Generator current Generator field voltage Generator field current Active power MW Reactive power MVAR Field Temperature Frequency 10 1 3 The Excitation System shall be provided transducers and instruments for existing signals at the gas turbine control panel and the DCS system in the gas turbine control room and control room For example Generator field voltage Generator field current Rotor Temperature ete 10 1 4 The equipment is not required to supply negative reverse field current However negative field currents may be induced in the field under certain system conditions such as out of step and out of line energizing without causing damage to the excitation system and without shutting down the generator except where this is necessary for protection of the generator The excitation system shall be provided the crowbar device or over voltage protection device 10 1 5 The following failures shall be indicated by lamps or alarm messages mounted on the regulator cubicle and shall be provi
62. ractor of ultimate responsibility for an accomplishing the intent of the specification 3 Standards and Codes The equipment shall comply with the requirements and the latest revisions of the following standards where applicable IEEE 421 1 Standard Definitions for Excitation Systems for Synchronous Machines IEEE 421 2 Guides for the Identification Testing and Evaluation of the Dynamic Performance of Excitation System IEEE 421 3 High Potential Test Requirements for Excitation System for Synchronous Machine 5 28 IEEE 421 4 IEEE 421 5 ANSI IEEE C37 20 ANSI C37 100 IEEE C50 13 IEEE C37 90 1 IEEE C37 18 IEC 60076 IEC 60044 1 IEC 60265 Guides for the Preparation of Excitation System Recommended Practices for Excitation System Model for Power System Stability Devices Switchgear Assemblies Including Metal Enclosed Bus Definitions for Power Switchgear IEEE Standard for cylindrical rotor 50 Hz and 60 Hz Synchronous Generators Rated 10 MVA and above IEEE Standard for Surge Withstand Capabilities SWC Tests for Relays and Relay Systems Associated with Electric Power Apparatus Standard Enclosed Field Discharge Circuit Breaker for Rotating Electric Machinery Power Transformers Dry type Transformers Instrument Transformers Part 1 Current Transformers High Voltage general purpose switches 4 Terminology and abbreviation The following definitions shall apply Analog Point Any analog input analog output or
63. rame with provision for bolting it to the powerhouse floor 10 2 3 An opening shall be provided in the bottom of the housing to match the location of the existing floor opening to permit the entrance of instrument transformers secondary and miscellaneous cables which shall terminate in the auxiliary compartment 10 2 4 Interior panel lighting and convenience outlets shall be provided in all panel sections The lighting shall be 240 V 50 Hz from the station service 10 2 5 Shall be provided for permanent grounding of all exposed non current carrying metal parts as required by the specified standards All parts of the framework shall be in good electrical connection with one another for grounding purpose 10 2 6 Anti condensation heaters shall be provided 10 3 Grounding Terminals Grounding of the excitation cubicle shall be connected to the existing grounding system 10 4 Wiring and Terminations 10 4 1 The Contractor shall supply all wiring and terminations The power terminals shall be of the flat type with ANSI four bolt drilling All surface of power buses shall be coated with silver 10 4 2 The wiring passing through opening in metal parts of the excitation equipment or otherwise passing over or near metal edges shall be carefully protected against abrasion 10 4 3 In general close attention shall be given to the wiring in order to prevent failures or shutdown occurring as a result of vibration The wire insulation shall be resis
64. tant to flow and abrasion under the conditions to which it may be exposed 10 4 4 The wire marking of all control wiring shall be heat imprinted white tube with black letter 15 28 10 5 Painting The contractor shall refurbish the standard painting and color of the cubicle as same as the existing one 10 6 Nameplates 10 6 1 Nameplates instruction plates labels and tags warning plate warning signs identification label and any marking whatsoever on the equipment and parts and accessories thereof shall be in English language big enough for easily reading except where otherwise indicated in the specifications 10 6 2 Nameplates shall be made of stainless steel plate except nameplates attached to indoor control cabinets control boards cubicles and control boxes which shall be made of engraved laminated acrylic resin screw driven and shall be in English language white letters on black ground 10 6 3 All equipment shall be identified and all nameplate wording and sizing shall be subject to EGAT s approval 11 System Software and Documentation All system software and documentations for the proposed system shall be English language The system software and documentation requirements for the proposed system shall be as the following 11 1 System Software A complete set of software program packages shall be provided to implement the functional of the proposed system The Bidder shall be responsible for developing debuggi
65. tems within thirty 30 days before the plant outage The Contractor s factory testing shall include verification of all data links between the Excitation System and the foreign equipment The test shall demonstrate the operation of the data link between the Excitation System and the foreign equipment The Contractor shall perform a complete function test of the Excitation System by using all final system programs and simulated inputs through input modules The factory acceptance test shall include all exercises which the combination of hardware and software The test shall include but not be limited the following a Rectifier The Contractor shall submit details of tests for the EGAT approval including operational tests on load and dielectric tests b Control and Regulator Equipment The Contractor shall perform operational tests on load wiring tests and functional tests on all relays contactors and other devices c Field Breaker Insulation Test Contact Resistance Test Timing Test shall be applied to field breaker and including operational tests 19 28 d The equipment shall be functionally tested insofar as practicable in the Contractor s factory to test operation of all circuits and devices and to optimize performance Bill of materials or part lists shall also be checked e Through exercising of each device including the CPUs f Comprehensive demonstration of hardware and software failure test g Demonstration of th
66. thority of Thailand EGAT has decided to renovate the Excitation control system to maintain the reliability and availability in Power plant Therefore we will have improved by change all provide new excitation control system for 2 sets at BPK C41 and 42 excluding the existing 2 sets of excitation transformer This specification defines the equipment required work and conditions in which the bidder is invited to bid for Bang Pakong Combined Cycle Power Plant Block 4 Excitation Control System Renovation Project 2 General The Contractor shall provide all equipment and services associated with the detailed design and engineering fabrication factory testing delivery to the Bang Pakong Power Plant for equipment supplied dismantling erection training startup testing commissioning documentation performance determination and quality assurance of an Excitation control system for the Gas Turbine Generator at BPK C41 and 42 as a complete plant under the specified conditions It is the intent of the contract documents to describe a functionally of project to be designed and supplied in accordance with the contract documents Any work materials or equipment that may reasonably infer from the contract documents or from prevailing custom or trade usage as being required to produce the intended result shall be furnished and performed whether or not specifically called for However literal adherence to these specifications shall not relieve the cont
67. tion of control logic The Contractor s technical supervisors shall be graduated engineers or shall possess equivalent credentials Each technical supervisor shall be experienced in the particular work he is assigned to administer Technical supervisors shall be provided in the experience areas of electrical engineering Auto Voltage Regulator AVR Power rectify instrumentation and control systems for gas turbine and steam turbine unit protection These services shall be performed by a qualified field service engineer at least five 5 years experience in Excitation System installation supervision hardware and software check power and grounding check loop checking and loop tuning The system tuning shall be performed with assistance of EGAT by the Contractor as required to operate smoothly through all operation modes including system static and dynamic ramp load test plant dynamic load test 23 28 12 7 Crafts Sufficient numbers of crafts shall be provided by the Contractor to support completion of the work included under this specification A group of craftsmen shall be assigned and dedicated for support of testing and start up activities 13 Installation Equipment and Special Tools 13 1 One complete set of a special tools and special lifting attachments which may be necessary or convenient for assembling dismantling and maintaining the excitation system contractor shall be provided 13 2 One complete set of programming tool for mainten
68. ts for verifications shall be conducted by the contractor The system tuning shall be performed with assistance of EGAT by the Contractor as required to operate smoothly through all operation modes 12 1 Factory Acceptance Test FAT The Contractor shall provide at least five 5 days program relevant to the project control design application software programming hardware and software configuration and implementation hardware and software function tests and parameter tuning for the three 3 EGAT engineers to participate in all above engineering of the project The contractor shall be providing convenient for engineering participate of the EGAT s personnel The Contractor shall provide factory testing services and equipment for the Excitation System and the other system as specified in this specification The testing shall be performed at the contractor s factory with cost of contractor In case of FAT shall be performed in the foreign country the contractor shall be provide convenient for EGAT s witness personnel The proposed system shall be tested as full function for all systems use of actual system cables to interconnect the various separate items of system equipment All functions and communication routines of each system shall be tested and verified The Contractor shall submit the test procedure and schedule for EGAT approval as early within thirty 30 days before start of the FAT The FAT shall be completed No major pending i
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