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GE Industrial Systems

GEH-6632

EX2100

™ 

Excitation Control

User’s Guide

Summary of Contents for EX2100

Page 1: ...g GE Industrial Systems GEH 6632 EX2100 Excitation Control User s Guide ...

Page 2: ......

Page 3: ...g GE Industrial Systems Document GEH 6632 Issue Date 2000 09 30 EX2100 Excitation Control User s Guide ...

Page 4: ...ns proprietary information of General Electric Company USA and is furnished to its customer solely to assist that customer in the installation testing operation and or maintenance of the equipment described This document shall not be reproduced in whole or in part nor shall its contents be disclosed to any third party without the written approval of GE Industrial Systems Document Identification GE...

Page 5: ...condition or statement that if not strictly observed could result in personal injury or death Indicates a procedure condition or statement that if not strictly observed could result in damage to or destruction of equipment Note Indicates an essential or important procedure condition or statement ...

Page 6: ...st equipment from the equipment under test presents potential electrical hazards If the test equipment cannot be grounded to the equipment under test the test equipment s case must be shielded to prevent contact by personnel To minimize hazard of electrical shock or burn approved grounding practices and procedures must be strictly followed To prevent personal injury or equipment damage caused by e...

Page 7: ...______________________________________________ ______ __________________________________________________________________________________ ______ __________________________________________________________________________________ ______ __________________________________________________________________________________ Other Comments What you like what could be added how to improve and such __________...

Page 8: ... staple or tape ____________________________ ____________________________ ____________________________ GE Industrial Systems Documentation Design Rm 291 1501 Roanoke Blvd Salem VA 24153 6492 USA Fold here first Place stamp here ...

Page 9: ...e Wheeling Diode De excitation 2 7 Auxiliary Cabinet 2 8 Ac Line to Line Filters 2 8 De excitation Module EDEX 2 8 Shaft Voltage Suppressor 2 9 Field Flashing Module 2 9 Field Ground Detector EXAM and EGDM 2 9 High Voltage Interface HVI 2 9 Control Cabinet 2 10 Diagnostic Interface Keypad 2 10 Control Module 2 11 Simplex Control System 2 12 Redundant Control System 2 13 Control Power Supplies 2 14...

Page 10: ... Converter 3 11 Related Board Publications 3 11 Chapter 4 Terminal Board I O and Equipment Connections 4 1 Introduction 4 1 Power Connections and Analog I O 4 2 Power Potential Transformer Inputs 4 3 Potential and Current Transformer Inputs 4 3 Analog Input 4 3 Customer Contact I O 4 4 Power Supply Inputs 4 6 Line Filter Connections 4 7 Exciter Internal I O 4 8 Exciter AC Feedback 4 8 Exciter DC F...

Page 11: ...aults 5 9 Editing Parameters 5 10 Parameter Backup 5 11 Firmware and Hardware Information 5 13 Protecting the Keypad 5 14 Modifying the Protections 5 14 Appendix A Warranty and Renewal Parts A 1 Introduction A 1 Identifying the Part A 2 Renewal Parts List A 2 Part Number Structure A 2 Warranty Terms A 4 How to Order Parts A 5 Data Nameplate A 5 ML Number A 5 Appendix B Ratings and Specifications B...

Page 12: ...iv Contents GEH 6632 EX2100 User s Guide Notes ...

Page 13: ...urbines This chapter introduces the exciter and defines the document contents Its purpose is to present a general product overview as follows Section Topic Page System Overview 1 2 Hardware Overview 1 5 Software Overview 1 6 Technical Characteristics 1 6 How to Get Help 1 8 Related Documents 1 8 Document Distribution 1 8 Chapter 2 Functional Description Chapter 3 Printed Wiring Boards Overview Cha...

Page 14: ...stem Toolbox toolbox for configuration the turbine control the LCI Static Starter and the HMI operator interface Figure 1 2 is a simplified one line diagram of the exciter showing the power source generator current and voltage measurements control module power conversion module PCM and protection circuits In the potential source system the secondary of the PPT is connected to the input of a 3 phas...

Page 15: ...rs CTs Potential Transformers PTs Generator Transmission Line Turbine Power Conversion Module Bridge Instrumentation Ac Source Controlled dc to Field Control Sequencing Protection Data Highway to Turbine Control HMI DCS Exciter Power Potential Transformer PPT EX2100 Exciter Figure 1 1 Overview of Generator and Exciter System ...

Page 16: ...Selector Control M2 Control M1 Control C AC AC CB Aux Source PT CT DC AC CB or Disconnect PPT Power Conversion Modules Bridge Current Voltage PCT 3 Diagnostic Interface Keypad Control Power Supplies AC DC Unit Data Highway Deexcitation Crowbar PT Potential Transformer CT Current Transformer CB Circuit Breaker I O Input Output PCT Power Current Transformer PPT Power Potential Transformer Compound S...

Page 17: ...ession power conversion cabinet for the power SCR cells cooling fans dc contactors and ac disconnect The exciter s power converter consists of bridge rectifiers resistor capacitor filter configurations and control circuitry An outside view of the cabinets is shown in Figure 1 3 The components and bridge size vary for different excitation systems and for the power output required Control Cabinet Au...

Page 18: ...iting The blocks can be interrogated while the exciter is running by using the toolbox The dynamically changing I O values of each block can be observed in operation which is valuable during startup or troubleshooting Technical Characteristics Summary characteristics for the EX2100 are as follows for further details refer to Appendix B Unit Specific ratings are provided on equipment nameplate and ...

Page 19: ...ristics Resistive load 0 5 A Inductive load 0 1 A 10 V differential amplifier input 1 Thermal Base controls cabinet Continuous operation in a 0 to 40 ºC ambient environment with 5 to 95 humidity non condensing Base power conversion and auxiliary cabinet Continuous operation in a 0 to 40 ºC ambient environment with 5 to 95 humidity non condensing Cabinet Dimensions Weight Redundant control with dua...

Page 20: ...ation and Startup Guide GEH 6633 EX2100 Troubleshooting Preventive and Online Maintenance GEH 6403 Control System Toolbox for Mark VI Turbine Controller Printed Wiring Board GEI publications refer to Chapter 3 Document Distribution GE Industrial Systems supplies product documents to its customers to support the equipment provided for each requisition The contract documents define the terms of the ...

Page 21: ...tors 41A or 41A 41B Optional 2 7 Free Wheeling Diode De excitation 2 7 Auxiliary Cabinet 2 8 Ac Line to Line Filters 2 8 De excitation Module EDEX 2 8 Shaft Voltage Suppressor 2 9 Field Flashing Module 2 9 Field Ground Detector EXAM and EGDM 2 9 High Voltage Interface HVI 2 9 Control Cabinet 2 10 Diagnostic Interface Keyad 2 10 Control Module 2 11 Simplex Control System 2 12 Redundant Control Syst...

Page 22: ...e Warm backup bridge configuration Multibridge configuration for high current requirements Compound power source separate from exciter Auxiliary power source bus fed Crowbar module for hydro and other special applications Dc Disconnect Field ground detector Redundant ac source for power supply Ac disconnect Field flashing module Redundant controllers providing a Triple Modular Redundant TMR system...

Page 23: ...edundant control and with single or redundant bridges Variations of the single control type are shown in Figure 2 1 Simplex Control with Parallel PCMs Control with I O and Operator Keypad Simplex Control with Single PCM Control with I O and Operator Keypad PCM PCM 1 PCM 2 PCM 3 PCM 4 PCM 5 PCM 6 Figure 2 1 Simplex Control Configurations ...

Page 24: ...l Control with Warm Backup PCMs PCM PCM Dual Control with Parallel PCMs PCM 1 PCM 2 PCM 3 PCM 4 PCM 5 PCM 6 C Control Selection Logic Protection C Control Selection Logic Protection C Control Selection Logic Protection M1 Control I O and Operator Keypad M1 Control I O and Operator Keypad M1 Control I O and Operator Keypad M2 Control I O and Operator Keypad M2 Control I O and Operator Keypad M2 Con...

Page 25: ...hyristors controlled by the Exciter Gate Pulse Amplifier board EGPA as shown in Figure 2 3 Heat is dissipated through large aluminum cooling fins and forced air flow from overhead fans Leg Reactors and Cell Snubbers The commutating reactors are located in the ac legs feeding the SCRs and the snubbers are an RC circuit from the anode to the cathode of each SCR The cell snubbers line to line snubber...

Page 26: ...lifiers directly control the SCRs The EGPA board interfaces the control to the Power Bridge EGPA takes the gate commands from the ESEL board in the controller and generates the gate firing pulses for six SCRs Silicon Controlled Rectifiers It is also the interface for current conduction feedback and bridge airflow and temperature monitoring On a new exciter an RTD is used to monitor the temperature...

Page 27: ...between the power conversion module and the generator field The contactor picks up when the running mode is selected and no fault exists in the excitation The contactors are normally actuated using pilot relays on the EXTB board driven by the controller The auxiliary contacts from the contactor are routed back through the EXTB board as feedback signals Free Wheeling Diode De excitation De excitati...

Page 28: ...ely The stored field energy must be dissipated through some other means SCR De excitation Module EDEX For customers requiring a rapid de excitation an SCR de excitation module is provided In the EDEX module an SCR is fired to provide a conduction path through the field discharge resistor or inductor for the field current to flow and dissipate the field energy The de excitation module has dual inde...

Page 29: ...ield ground detector protects the generator shaft The generator field winding is electrically isolated from ground The existence of one ground usually does not damage the rotor However the presence of two or more grounds in the field winding path causes magnetic and thermal imbalances and localized heating which may damage the rotor forging or other metallic parts The function of the field ground ...

Page 30: ... and faults Pushbuttons Organized into functional groups Navigation buttons for using the menu Exciter Control buttons Run and Stop buttons Exciter Health State Icons Run Green Stop Red Reset Faults Command Menu Voltage Level Exciter Control Status Menu Enter Escape Navigation FVR Feedback 0 0 Volts FldCurrAmps 0 00 Amps EX2100 Excitation Control g 30 0 150 Auto Man On Off 100 Vmag Freq_Hz Imag Wa...

Page 31: ... simplex control system if the rack contains all three controllers then it is a redundant control system The control and I O processor boards are as follows Microprocessor based Application Control Layer Module ACLA controller with LAN Ethernet port Microprocessor based Digital Signal Processor DSPX controller Exciter ISBus Board EISB with fiber optic communication with the bridge feedback board E...

Page 32: ...ta Highway to Mark VI LCI and HMI PPT and air core CT ac feedbacks EPSM Power Supply Option DACA Rectified ac Coil Power GPA power 125 Vdc 3 phase Voltage Sensing 3 phase Current Sensing Contact Inputs Contact Outputs Gate Pulse Amplifier Fiber optic Feedback EDCF Keypad Computer Tool Field Current Voltage EGPA To SCRs 125Vdc 5 Vdc 15 Vdc 24 Vdc 70 Vdc To Flashing panel 41 Device De excitation 125...

Page 33: ...t circuits 2nd 2nd 2nd 2nd TRIP TRIP TRIP TRIP ECTB Bridge 1 ACLA DSPX DSPX EMIO Master I O EMIO Master I 0 Bridge 2 Bridge 3 Bridge 4 Bridge 5 Bridge 6 70V De excitation 125Vdc Crowbar Gate Pulse Amplifiers EISB ESEL EISB EISB EDCF EDCF EDCF EGPA 125Vdc EGPA 125Vdc Power Supply EPDM Coil Power 125 V dc Battery 125 Vdc P24V PN24V 70V EDEX De excitation EACF PPT and air core CT AC Feedbacks Field G...

Page 34: ...1 ACLA M2 DSPX M2 DSPX C ISBus To plant controls Communication across backplane Serial Modbus Serial Modbus DPM DPM I O I O I O Ethernet Data Highway EGD Modbus Figure 2 7 Communication between Redundant Control Boards Control Power Supplies Redundant supplies provide high reliability Power for the controls come from the Exciter Power Distribution Module EPDM This is supplied by a 125 V dc source ...

Page 35: ...CA 1 115 Vac DACA 2 3 1 3 3 125 V dc 115 Vac Filter Filter Filter 21 22 115 Vac 1 JDACA1 JDACA1 1 JDACA2 1 JDACA2 BJS jumper is supplied for isolation of ground reference on systems with external reference 7 10 9 12 7 10 9 12 P125V N125V 1 2 1 2 1 2 1 3 SW4 SW5 SW6 FU1 FU2 1 2 FU3 1 2 1 2 SW1 SW2 SW3 DS1 G FU4 FU5 FU6 DS2 G DS3 G DS4 G DS5 G DS6 G DS7 G Chassis Ground BJS R1 R2 To EGPA1 To EGPA2 T...

Page 36: ...CONTROL MEDIA CONV EDEX EDCF EGDM EDEX CROWBAR J2C GROUND DETECT EPSM Power Supply M1 EGDM Ground Detector M1 Blank plate Fan Fan Fan Power to Exciter Backplane EBKP Control Rack To M1 To M2 To C EPSM Power Supply M2 EPSM Power Supply C EGDM Ground Detector M2 EGDM Ground Detector C J1M1 To J1C To J1M2 J1M2 J1C 125 V dc 115 V ac Supplies To J1M1 Exciter Power Distribution Module EPDM Figure 2 9 Ex...

Page 37: ...EPCT board which acts as a signal conditioner to isolate and scale the signals The conditioned signals are then fed to the controller Software conversion algorithms use these signals to calculate system variables for use by the regulator limiter and protection functions The outputs from these software calculations include the following Generator voltage magnitude and generator frequency derived fr...

Page 38: ...ing DC Regulator AC Regulator Exciter Bridge AC Voltage adjust DC Voltage adjust Exciter System Stabilizer Circuits Over excitation Limiter Under excitation Limiter Voltage Sensing Load Compensation Power System Stabilizer V Hz Limiter Protection VAR Power Factor Control Figure 2 10 Control Scheme ...

Page 39: ...Frequency VMAG VMAG Slip External Raise Lower MANUAL REF FVR Field Voltage Regulator FCR Field Current Regulator Min Field Voltage Regulator Setpoint Firing Commd to Bridge Field Volts from Bridge Output FCR Setpoint User Input Field Current from Bridge DC Shunt External Raise Lower Watts VARs Reactive Current Figure 2 11 Software Block Diagram The output of the control software is the firing comm...

Page 40: ...VR and the AVR tracking value The EXASP inputs are as follows Stabilizing signal from the PSS block Output from the AUTOREF block External test signal Protective signal generated by the UEL block Reactive current input feedback Voltage magnitude input feedback Frequency input feedback The outputs to the AVR block are the AVR setpoint and tracking value Automatic Voltage Regulator AVR Generator ter...

Page 41: ...d parameters and conditions Raise Lower inputs to MANUAL REF come in from other control devices on the Data Highway such as the turbine control or HMI Field Voltage and Current Regulators FVR FCR The Field Voltage Regulator FVR is the typical manual regulator supplied on most applications and uses the generator field voltage as the feedback input While FVR does permit the current to vary as a func...

Page 42: ...it the automatic voltage regulator demand for underexcited reactive current or reactive power UEL prevents reduction of the generator excitation to a level where the small signal steady state stability limit or the stator core end region heating limit is exceeded Performance is specified by identifying the region of limiter action on the generator capability curve There is both a setpoint section ...

Page 43: ...al time data and alarms on the CIMPLICITY graphic displays An HMI can be configured as a server or viewer and can contain tools and utility programs Redundant cable operation is optional and if supplied operation continues even if one cable is faulted The Unit Data Highway UDH connects the exciter with the HMI or HMI Data Server The network is 10BaseT Ethernet and uses separately powered network s...

Page 44: ...2 24 Chapter 2 Functional Description GEH 6632 EX2100 User s Guide Notes ...

Page 45: ...otection modules and power supply boards This chapter is organized as follows Section Page Control Boards 3 2 EBKP Backplane 3 2 DSPX Board 3 2 ACLA Board 3 4 EISB Board 3 4 EMIO Board 3 4 ESEL Board 3 4 I O Terminal Boards 3 5 EPCT Board 3 5 ECTB Board 3 5 EXTB Board 3 5 EDCF Board 3 6 EACF Board 3 6 Bridge and Protection Boards and Modules 3 7 EGPA Board 3 7 EXCS Board 3 7 EDEX Board 3 7 EGDM Mo...

Page 46: ...e upper part of the backplane contains DIN connectors for the plug in control boards The lower part of the backplane contains D SUB connectors for I O interface cables and circular DIN connectors for keypad interface cables power supply plugs and test rings Labels on the connectors in Figure 3 1 refer to the boards and devices to which the cables are connected For more information refer to Chapter...

Page 47: ... P A 4 E A C F E X T B E G P A 5 E G P A 6 E X T B E A C F DSPX EMIO ESEL ESEL EMIO DSPX ACLA ACLA EISB EISB EMIO EISB J315 J314 J414 J415 J515 J514 E P C T E C T B E A C F E X T B Tool C Keypad C DSPX Test Rings M1 Test Rings M2 Test Rings C J610 J612 IS200EBKPG1AAA 2 1 OK ACTIVE ENET FLASH RST S T A T U S 2 1 OK ACTIVE ENET FLASH RST S T A T U S 2 1 4 3 J502 2 1 4 3 J510 2 1 4 3 J512 M1 Fan Pwr ...

Page 48: ...nnectors on the front panel it accepts current and voltage signals from the generator field and from the exciter if required using EDCF boards and receives and transmits signals to the Ground Detection Module EGDM For more information refer to Chapter 4 and GEI 100454 EMIO Board The EMIO is a single slot double height VME style board that manages the I O from the EPCT ECTB EACF and EXTB terminal b...

Page 49: ...ed wetted with 70 V dc by ECTB Also the 52G and 86 G contact inputs are powered and monitored by ECTB In the redundant case power comes from the M1 and M2 power supplies For more information refer to Chapter 4 and GEI 100457 EXTB Board EXTB handles field flashing and protection functions The EXTB board supports pilot relay contact outputs contact inputs and signal conditioning circuits EXTB cables...

Page 50: ... to scale down the bridge voltage depending on the type of bridge application For more information refer to Chapter 4 and GEI 100464 EACF Board EACF handles bridge ac voltage and current feedback The EACF board measures the exciter PPT ac supply voltage and current The EACF terminal board contains transformers for a 3 phase voltage measurement and terminals for two Flux Air core coils The outputs ...

Page 51: ...used to detect the presence of current in the bus The output is a logic signal EDEX Board EDEX is usually controlled by EXTB but can initiate de excitation if control fails The EDEX board is the main board in the de excitation module EDEX provides de excitation SCR firing conduction sense feedback and voltage retention to ensure operation in the event of a power failure EMIO initiates de excitatio...

Page 52: ...ection ratio followed by an A to D converter Voltage Controlled Oscillator VCO This feeds a fiber optic transmitter that is cabled to EISB The signal conditioner circuitry is powered by an isolated power supply to maintain personnel and equipment safety due to the high common mode voltage at the Sense Resistor For more information refer to Chapter 4 and GEI 100467 EXAM Module The EXAM mounts in th...

Page 53: ...ollers Outputs are wired to the EPBP for distribution For more information refer to Chapter 4 EPBP Backplane The EPBP holds three electrically isolated power supplies EPSM that supply power to the M1 M2 and C controllers It also holds three EGDM EPBP accepts 125 V dc from the adjacent EPDM and distributes logic level power from the three EPSM to the three controllers Each power supply has an indep...

Page 54: ...14M2 J13M2 J12M2 P107 P207 FAN EXTB EETB EDEX ECTB C J602 CONTROL MEDIA CONV J21C J16 C J17 C EDEXEDCF J19 C EGDM J18 C EDEX CROW BAR J20 C J15C J14C J13C J12C P111 P211 P113 P213 P117 P217 BARCODE J2C GROUND DETECT IS200EPBPG1 EPSM EPSM EPSM EGDM EGDM EGDM Blank plate Figure 3 2 Exciter Power Backplane DACA Ac to Dc Converter The DACA is an ac to dc converter that is powered by a 115 V ac source ...

Page 55: ...iter ISBus board GEI 100453 IS200EMIO Exciter Main I O board GEI 100456 IS200ESEL Exciter Selector board GEI 100459 IS200EPCT Exciter PT CT board GEI 100457 IS200ECTB Exciter Contact Terminal Board GEI 100458 IS200EXTB Exciter Terminal Board GEI 100464 IS200EDCF Exciter DC Feedback board GEI 100465 IS200EACF Exciter AC Feedback board GEI 100461 IS200EGPA Exciter Gate Pulse Amplifier board GEI 1004...

Page 56: ...3 12 Chapter 3 Printed Wiring Boards Overview GEH 6632 EX2100 User s Guide Notes ...

Page 57: ...is organized as follows Section Page Power Connections and Analog I O 4 2 Power Potential Transformer Inputs 4 3 Potential and Current Transformer Inputs 4 3 Analog Input 4 3 Customer Contact I O 4 4 Power Supply Inputs 4 6 Line Filter Connections 4 7 Exciter Internal I O 4 8 Exciter AC Feedback 4 8 Exciter DC Feedback 4 8 De Excitation 4 11 Crowbar 4 14 Field Ground Detector 4 14 Field Flashing 4...

Page 58: ... 12 0 O PE N O R G R O U N D E D Y CTSW3 CTSW1 H3 H2 H1 X3 X2 X1 PPT P RI VA C 12 47 0 SE C VA C 65 0 KV A 12 80 L3 L2 L1 K3 K2 K1 Customer Supplied To Bridge 1 Generator Field Generator Field 41AC1 Power Conversion Cabinet PT CT PT PT PT CT EPCT 5H 5L 1H 1L 5H 5L 1H 1L Note Circuits shown external to the exciter are for reference only 1 2 3 Phase Rotation Fa n ou t cir cui ts J3 05 J3 08 J3 15 To...

Page 59: ...ting low voltage transformer output signals are cabled to the EMIO board in the control rack Generator Voltage Measurement The cable lengths from the generator PTs can be up to 1000 ft of 12 AWG wire The PT secondary outputs are nominally 115 V rms at 50 60 Hz and are fused On EPCT the two transformers make a three wire open delta voltage measurement yielding 1 533 V rms for a 115 V rms input In t...

Page 60: ...r outputs For each relay the coil current and the status of a relay auxiliary contact is monitored These feedbacks are cabled to EMIO in the controller Refer to Figure 4 2 and Table 4 1 Table 4 1 General Purpose Relay Contact Characteristics Item Description Customer Power 125 V dc nominal 24 V dc min Relay break characteristic Resistive load 2 A 28 V dc 0 5 A 125 V dc Inductive 1 A 28 V dc 0 007 ...

Page 61: ...1 J405 Auxiliary Contact Input Six Circuits as Above 86G Contact 52G Contact P70Vdc Current Limit Circuit Red LED P70Vdc Current Limit Circuit Red LED From M1 EMIO P70Vdc P70 V dc Coil K GP Relay Driver P24D From M1 J13M1 NO COM NC P24M1 ECTBG2 Simplex TB1 TB2 Current Limit To Optocoupler on M1 EMIO P24D 18 19 20 1 5 33 34 45 46 47 48 Open for Trip Closed online Term 1 5 Ex trip to Customer 86 Ex ...

Page 62: ... and the 115 V ac suply AC1 A second ac supply AC2 can also be connected J9 1 3 1 2 1 2 1 2 1 2 1 2 1 2 1 2 1 10 3 12 JDACA2 JDACA1 1 10 3 12 J8A J8B J8C J1M1 J1M2 J1C SW3 SW1 SW2 SW4 SW5 SW6 SW7 SPARE P125Vdc 2 4 6 8 10 12 14 16 18 20 22 24 x x x x x x x x x x x x x 1 3 5 7 9 11 13 15 17 19 21 23 x x x x x x x x x x x x x TB1 P125Vdc P125Vdc N125Vdc N125Vdc N125Vdc AC1H AC1H AC1N AC1N AC2H AC2H A...

Page 63: ...top of the auxiliary cabinet Connections to the line filter are shown in Figure 4 4 L1 L2 L3 DISC 1 2 4 6 1 3 5 F U1 F U2 F U3 LFU1 To Warm Backup Bridge B2 B L1 B L2 B L3 GND L1 L2 L3 GND on Aux Panel 2 4 6 1 3 5 F U1 F U2 F U3 LFU2 L1 L2 L3 From PPT J5 04 J5 14 J5 09 Coil1_H Coil2_L Coil1_L Coil2_H EACF1 J5 04 J5 14 J5 09 Control Enclosure EKBP Rack 480V 1 6V EMIO M1 C EMIO M2 EMIO Auxiliary Enc...

Page 64: ... The EDCF board measures field current and field voltage at the SCR bridge and interfaces to the EISB board in the controller over a high speed fiber optic link The fiber optics provides voltage isolation between the two boards and high noise immunity For a circuit block diagram refer to Figure 4 5 The field voltage feedback circuit provides seven selector settings to scale down the bridge voltage...

Page 65: ...f 1 of full scale reading These pulses drive the LED in the optical isolator coupled to the fiber optic cable Field Voltage Feedback The bridge voltage is measured across the negative terminal of the bridge and the positive terminal of the current shunt After scaling the voltage with the jumpered resistors the signals are input into a differential amplifier which controls the voltage controlled os...

Page 66: ... Excit HS FDI 1 TB1 2 TB1 1 Shaft Voltage J505 J508 J515 EXTB Control Cabinet K41_M1 K41_M2 K41_M2 K41_M1 K41_C K41_C Feedback 70V Return J6 9 1 2 3 J505 J508 J515 EMIO C M2 M1 EMIO EMIO Control Rack P70V EISB M1 Auxiliary Cabinet 2 1 P1 E1 VCO VCO EDCF 1 2 1 P2 P24VDC BK BK WH VFOF CFOF Volts Current Control Cabinet Generator Field Duplex Fiber Optic Link 2 1 PSM1 Voltage Current PPT Scaling Shun...

Page 67: ...ssipates the stored energy of the generator field through the field discharge device Feedback from either conduction sensor verifies that the discharge circuit has operated successfully If both independent firing control circuits fail to fire the SCR is fired by the anode firing circuit when the anode to cathode voltage has exceeded the selected level For large exciters it is possible to connect m...

Page 68: ...nd G2 boards 41 Close J9 Bkr Ct Bkr Ct Bkr Ct To EPBP J17M2 To EPBP J17M1 M1 De Excit Status M2 De Excit Status Self Firing 5 2 J8 M2 Firing Command M1 Firing Command 3 1 6 4 DEPL HS HS Auxiliary Cabinet 2 1 FDI Generator Field Generator Field De Excitation EDEX Converter Cabinet 7 8 7 8 1 2 1 2 4 3 3 4 A B A B P24V P24V N24 N24 N125 1 3 2 To M1 To M2 To C P24 COM N24 P24 COM N24 1 3 2 Simplex ver...

Page 69: ...Status J8 J6 M2 Status KDEP J515 J508 P70V Status Feedback 70V Ret 3 6 4 1 3 2 4 5 8 6 1 9 P125 P125 N125 41 Trip 41 Close Bkr Ct Bkr Ct Bkr Ct CTB 7 1 3 N125 P125 J9 2 NC P70VM1 P70VM2 J12M1 J12M2 P70Vdc Customer Breaker Close Trip A B A B 41 Breaker N125 2 To M1 To M2 To C Simplex version is G4 Conduction Sense Circuit M1 M2 M2 C C M1 M1 M2 M2 C C M1 M1 Firing Command N24V N24V To EPBP J17M2 To ...

Page 70: ...detects field leakage resistance between any point in the field circuit of the generator and ground The active detection system shown in Figure 4 9 applies a low frequency square wave voltage with respect to ground and monitors for current flow through a high impedance ground resistor The square wave is 50 V dc at 0 2 Hz frequency If PRV resistors are present grounds anywhere in the system can be ...

Page 71: ...Receiver VCO EGDM M1 Optical Transmitter Oscillator 1 Optical Receiver VCO M2 Optical Transmitter Oscillator 2 Optical Receiver VCO C Optical Transmitter From Flashing 53B M2 C Control Ground Detector Attenuator Module EXAM 65 Vdc 5V 15V Power Supply Control Backplane EBKP P24 V To DSPX Counters Oscillator control To DSPX Counters Oscillator control To DSPX Counters Master Select J2 Figure 4 9 Fie...

Page 72: ...lashing currents This happens if the flashing control fails leaving the flashing current on continuously The flashing current magnitude required for a generator is set by configuring a maximum and minimum allowable value in the control module The current values are preset in the factory based on information supplied These values define the envelope in which the hysteretic flashing control holds th...

Page 73: ...3B 53A 9 5 2 10 4 J7 3 12 53A Aux 1 2 1 2 SUP 3 4 SUP B B A A Current Limit Circuit Current Limit Circuit Auxiliary Panel Generator Field x 1 2 PTB 1 53B 53A Station Battery 125 Vdc x From Shunt1 w v 53B Y Y Flashing J1 53B Aux 7 8 4 5 6 1 2 3 1 2 3 EXAM J1 FBK1 FU1 FU2 J5M2 J5C TB1 Shaft Voltage Suppresser 1 3 2 K53A relay contacts K53B relay contacts M1 M2 C M2 C M1 M1 M2 C M2 C M1 Figure 4 10 F...

Page 74: ...he shaft relative to ground that if not effectively controlled can damage both journals and bearings The shaft voltage suppressor is a filter that conducts the high frequency components of the induced voltages to ground and limits shaft voltage caused by thyristor commutation to less than 7 V zero to peak For the connections to the field refer to Figure 4 11 Generator Field Generator Field TH1 TH2...

Page 75: ... traffic at 10 Mbps using unshielded twisted pair cable is 100 m 100Base FX fiber optics can be used for longer distance communication between the local controllers and the central control room The 100BaseFX ports in the T switch and the Ethernet switch are for SC type fiber optic connectors The maximum distance at 100 Mbps using 100BaseFX fiber optic cables is 2 km Redundancy can be obtained by u...

Page 76: ...the ACLA This is a 10BaseT port and uses an RJ 45 connector for unshielded twisted pair cable J304 J305 J306 J307 J308 J309 J405 J404 J406 J407 J408 J409 J509 J508 J507 J506 J505 J504 M1 Power M2 Power C Powr Tool M1 Tool M2 Key Pad M1 Key Pad M2 E G P A 1 E G P A 2 E G P A 3 E G P A 4 E A C F E G P A 5 E G P A 6 E A C F DSPX EMIO ESEL ESEL EMIO DSPX ACLA ACLA EISB EISB EMIO EISB J315 J314 J414 J4...

Page 77: ...e Start and stop the exciter Set and adjust configuration parameters Examine and reset fault conditions This chapter is organized as follows Section Page Using the Pushbuttons 5 2 Reading the Display 5 5 Changing Display Units 5 7 Adjusting Display Contrast 5 7 Status Screen 5 8 Reading the Meters 5 8 Alternate Status Screen Display I O 5 8 Using the Menus 5 9 Viewing and Resetting Faults 5 9 Edit...

Page 78: ...vel Exciter Control Status Menu Enter Escape Navigation FVR Feedback 0 0 Volts FldCurrAmps 0 00 Amps EX2100 Excitation Control g 30 0 150 Auto Man On Off 100 Vmag Freq_Hz Imag Watts Balance Meter Vars 0 00 0 00 0 00 60 00 0 00 0 00 30 0 150 100 Display Status screens provide analog and digital representation of exciter functions and values Menu screens provide text based access to parameters wizar...

Page 79: ...tion Used to highlight reverse image an item in a menu of options Adjust Contrast if menu key is held down Entry of Numeric Parameter Used to index through numbers 0 9 when editing a parameter Entry of Option Parameter Used to index through 1 n choices See Parameter Configuration Menu Navigation Right Arrow button displays the next selected level down in a menu tree Left Arrow button displays next...

Page 80: ...2 Exciter Control Pushbuttons Button Function Reset Faults Resets faults Command Menu Quick access to a list of commonly used commands Auto Selects Auto mode AC regulator or AVR Man Selects Manual mode DC regulator or FVR Increase voltage VARS PF Decrease voltage VARS PF Run Stop ...

Page 81: ...ce Meter Vars 0 00 0 00 0 00 60 00 0 00 0 00 30 0 150 100 Animated Meters Text Identifying Exciter Variable Heartbeat Fault State Limiter Auto Mode Running Online Figure 5 2 Status Screen Example The Menu Screen see Figure 5 3 lists and provides access to menu based functions for adjusting parameters running wizards and viewing faults see Menu Selections Main Menu Fault List Alarms Application dat...

Page 82: ...ut cannot Auto mode Regulates terminal voltage Manual mode Regulates field voltage Control Test Mode The exciter is performing a diagnostic test Blank Exciter OK When no icon displays the exciter is operating correctly Abnormal Displayed when there are over ridden parameters Alarm state Displayed when an alarm condition occurs Fault State blinking Trip fault Displayed when a fault state occurs o S...

Page 83: ...eave Display units New Value Metric SI Present Value Metric SI Adjusting Display Contrast Shortcut Press and hold the Menu key Press the Up and Down arrows to adjust the display contrast Ø Ø Ø Ø To adjust the display contrast 1 From the Main Menu select General Setup 2 Then select a Keypad b Keypad Functions c Adjust Screen Contrast This displays the following screen CONTRAST ADJUSTMENT HOLD UP AR...

Page 84: ...nge Over Range Table 5 4 Animated Meter Characteristics Default for Status Screen Bar Graph Variable Numeric Display Units in Bar Graph DC bus voltage Magnitude of dc bus voltage FVR feedback Percentage of dc per unit volts VDC_PU AC line current Magnitude of ac line current I_Mag_Fil Percentage of source top rated current I_PU Alternate Status Screen Display I O The keypad has an alternate Status...

Page 85: ...s menu screen press the Escape button Left Arrow button or follow on screen instructions When a menu has more than one screen Move to the next screen by highlighting the last item on the displayed screen then press the Down Arrow button once more If the last menu item is reached then pressing the Down Arrow button will wrap back to the first item on that menu Viewing and Resetting Faults When the ...

Page 86: ...elect Fault List then select Display Fault History FAULT HISTORY DISPLAY 0 Cleared Fault reset 86 Trip DC Over current trip 115 Trip Bridge 1 Fan 1 BAD 58 Brief Low AC V 95 Field temp alarm RESET FAULTS NOW Editing Parameters There are two types of parameters that can be changed using the keypad Option parameters lists items options for you to select For example True False is an option parameter N...

Page 87: ... 6 7 8 9 e The e in the digit selection represents the start of the exponent in scientific notation If the e is used all digits to the right of the e make up the number s exponent Press ENTER to accept ESC to leave VHiTripLev New Value 1 3 Present Value 1 2 Low Limit 0 0000000 High Limit 3 4028239e38 4 When all of the digits have been changed press Enter to accept the new value or press Escape to ...

Page 88: ...not be recovered Press ENTER to continue ESC cancels 3 Press Enter to restore the backup parameters or Escape to cancel Restoring parameters from a backup file overwrites the currently active parameter values which cannot then be restored Ø To compare the active parameter set to the backup parameter set 1 From the Main Menu select Parameter Backup Functions then select Compare Current Parameters t...

Page 89: ...lays GE Generator Control EX2100 DSPX Firmware Version V02 06 00B DSPX Boot Monitor Version V02 02 00C DDI Firmware Version V02 00 00B Press ESC to exit Ø To view exciter hardware information From the Main Menu select 1 General Setup 2 Firmware Version Hardware Info 3 Display Hardware Information The following screen displays GE Generator Control Hardware Information IS200ESELH1APR 5473716 IS215AC...

Page 90: ...Exciter Control and the Configuration functions An operator can view but not edit parameters Operate Read Only enables the Exciter Control function but disables Configuration functions An operator can view but not edit parameters Configure Operate enables both the Exciter Control and the Configuration functions This is the default setting If you try to execute a function that is disabled in the ac...

Page 91: ...l or Password Keypad Security Keypad privilege Configure Keypad password If it does not match the keypad displays an error message Incorrect password Press Any Key to Continue 3 Use the Up and Down Arrow buttons to select either the Privilege Level or Password 4 Press Enter to edit the parameter See Editing Parameters Note When you modify the keypad password be sure to select Save Parameters To Ba...

Page 92: ...5 16 Chapter 5 Diagnostic Interface Keypad GEH 6632 EX2100 User s Guide Notes ...

Page 93: ...hat GE can process the order accurately and as soon as possible To minimize system downtime if repair is needed GE recommends that the customer keep a set of spare parts on hand The Renewal Parts Quotation lists recommended spares Appendix A of this manual provides information to help the user identify and obtain replacement parts It is organized as follows Section Page Identifying the Part A 2 Re...

Page 94: ...vides the Renewal Parts List with the exciter s custom instructions If this document is missing contact the nearest GE sales office or service representative to obtain a replacement copy You need to provide the following information see Figure A 4 to correctly identify the system Requisition number Model number Part Number Structure A GE part number is structured so that different portions of the ...

Page 95: ...Assembly Common Assemblies Common assemblies are subassemblies used as components of order specific assemblies Common assemblies are not designed for a particular exciter but provide a function used in other GE products For example 36C774524AAG48 is the part number for a cable Components Components are the basic parts that make up assemblies They represent the lowest discrete level of a system Com...

Page 96: ... 2Not backward compatible 3200 indicates a base level board 215 indicates a higher level assembly or added components such as PROM Manufacturer DS IS for GE in Salem VA Assembly level3 Functional acronym Group variation G or H Functional revision2 Functional revision1 Artwork revision1 Sample Board Part Number Warranty Terms The GE Terms and Conditions brochure details product warranty information...

Page 97: ...meplate Data Nameplate The data nameplate is located on the back of the cabinet door It provides information needed when ordering parts or contacting GE for assistance ML Number Each GE lineup cabinet panel case and core unit has a unique identifying catalog number also called the part or material list ML number This number is structured to provide information about that equipment The catalog numb...

Page 98: ...A 6 Appendix A Warranty and Renewal Parts GEH 6632 EX2100 User s Guide Notes ...

Page 99: ...sign Amperes EDA for 30 s at 40 ºC Power Sources Power for the PCM Voltage source Auxiliary bus Generator terminals Compound Source 600 or 1 000 V versions Power for the PCM VA power 3 251 KVA 1 000 V version Power for the PCM Frequency 3 phase 50 60 Hz 5 Power to the Cooling Fans 3 10 A rms 125 V ac single source Flashing power 125 250 V dc battery source with up to 200 A for at least 10 s 380 48...

Page 100: ...eatures Under Excitation Limiter UEL Over Excitation protection 76 Generator Field Ground detection 64F Generator Overvoltage protection 24G Loss of Excitation protection 40 V Hz limit 24 and trip 24T Bridge Over Temperature 26 Field Over Temperature 49 Phase Unbalance 22 PT Failure 60 Environmental Control Protection Base controls cabinet Continuous operation in a 0 to 40 ºC ambient environment B...

Page 101: ...50140 1993 Radiated RF Immunity EN 50082 2 1994 Generic Immunity Industrial Environment IEC 801 4 Electrical Fast Transient Susceptibility IEC 1000 4 5 Surge Immunity IEC 1000 4 6 Conducted RF Immunity ENV 55011 1991 ISM Equipment Emissions EN 61010 1 Safety of Electrical Equipment Industrial Machines IEC 529 Intrusion Protection Codes NEMA 1 IP 20 IEEE 421 1 Standard Definitions for Excitation Sy...

Page 102: ...B 4 Appendix B Ratings and Specifications GEH 6632 EX2100 User s Guide Notes ...

Page 103: ...r the exciter but not from the generator being controlled automatic voltage regulator AVR AVR is controller software that maintains the generator terminal voltage through the Field Voltage Regulator baud A unit of data transmission Baud rate is the number of bits per second transmitted BIOS Basic input output system Performs the controller boot up which includes hardware self tests and the file sy...

Page 104: ...ry digits bits a measure of data flow when bytes per second CMOS Complementary metal oxide semiconductor COM port Serial controller communication ports two COM1 is reserved for diagnostic information and the Serial Loader COM2 is used for I O communication configure To select specific options either by setting the location of hardware jumpers or loading software parameters into memory crowbar The ...

Page 105: ...ta through EGD exchanges pages EMI Electro magnetic interference this can affect an electronic control system EPBP Backplane Exciter Power Backplane holds power supply modules ground detect modules and connectors for power distribution EPDM Exciter Power Distribution Module distributes 125 V dc to the power supplies Ethernet LAN with a 10 100 M baud collision avoidance collision detection system u...

Page 106: ...ng inputs from the Automatic Voltage Regulator AVR and the field voltage feedback firmware The set of executable software that is stored in memory chips that hold their content without electrical power such as EEPROM or Flash flash A non volatile programmable memory device FVR Field Voltage Regulator software controlling the voltage across the field gating Controlling the conduction of the power S...

Page 107: ...nto and out of a device I O drivers Software that interfaces the controller with input output devices such as communication networks sensors and solenoid valves IP address The address assigned to a device on an Ethernet communication network line filter Filter networks across the three phase input lines to the exciter to minimize the voltage spikes that result from the abrupt decay of current duri...

Page 108: ...miter OEL OEL software limits the excitation current to prevent overfluxing the generator power conversion module PCM The PCM or Bridge consists of six three phase rectifiers with associated protection and control devices to generate the dc field current power current transformer PCT A PCT can be attached to the generator line to provide a portion of the three phase power for the exciter part of a...

Page 109: ...tem consisting of duplicated components boards or modules which can transfer functionality from a failed component to one of the duplicate components without loss of the entire system s functionality relay ladder diagram RLD A ladder diagram represents a relay circuit Power is considered to flow from the left rail through contacts to the coil connected at the right RFI Radio Frequency Interference...

Page 110: ...ced voltages in the field current signal The basic unit for variable information in the controller simplex System with only one set of control and I O boards Contrast with redundant control systems simulation Running the control system using a software model of the generator and exciter SOE Sequence of Events a high speed record of contact closures taken during a plant upset to allow detailed anal...

Page 111: ...vided equipment to the HMI Servers runs at 10 100 Mbaud and supports Peer to Peer communications V Hz V Hz is the ratio of generator voltage to the frequency this is limited to prevent overfluxing the generator VME board Versa Module Eurocard a European standard for printed circuit boards and backplane warm backup Two bridges are connected to the field but only one is actively producing power The ...

Page 112: ...x Glossary of Terms GEH 6632 EX2100 User s Guide Notes ...

Page 113: ...nput 1 7 3 4 3 6 4 4 B 2 contact output 1 7 3 5 3 6 4 4 B 2 control 1 1 1 2 1 5 1 7 2 1 2 4 2 6 2 8 2 11 2 13 2 14 2 17 2 19 2 20 2 21 3 1 3 2 3 4 3 9 3 11 4 3 4 4 4 8 4 11 4 14 4 16 4 19 5 1 5 2 B 3 Control Boards ACLA 1 6 2 11 2 13 2 14 3 1 3 2 3 4 4 19 4 20 DSPX 1 6 2 11 3 1 3 2 3 4 3 8 4 14 4 20 5 13 EBKP 3 1 3 2 3 6 3 11 4 8 EISB 2 11 3 1 3 2 3 4 3 6 3 8 4 8 EMIO 2 11 3 1 3 2 3 4 3 6 4 3 4 4 ...

Page 114: ...iter Attenuator Module 2 1 2 9 2 15 3 1 3 7 3 9 3 10 Exciter Backplane 3 1 3 2 3 6 3 11 4 8 Exciter Conduction Sensor Board 3 1 3 7 Exciter Configurations 2 1 2 3 Exciter Contact Terminal Board 1 7 2 15 3 1 3 4 3 6 3 10 3 11 4 4 B 2 Exciter DC Feedback 3 5 3 6 3 11 4 1 4 8 Exciter DC Feedback Board 2 6 2 9 2 13 3 1 3 4 3 6 3 10 3 11 4 8 Exciter Gate Pulse Amplifier Board 2 1 2 5 2 6 2 11 2 14 3 1 ...

Page 115: ... Power Conversion Module Potential transformers 1 7 B 2 Power Connections 4 1 4 2 power conversion cabinet 1 5 2 8 Power Conversion Cabinet 2 1 2 5 4 11 Free Wheeling Diode 2 1 2 7 Gate Pulse Amplifiers 2 1 2 6 Main Dc Contactors 2 1 2 7 Manual Ac Disconnect 2 1 2 5 Power Converter Module 1 6 2 1 2 5 power conversion module 1 2 1 6 1 7 2 1 2 2 2 5 3 5 3 7 4 14 B 1 B 3 Power Conversion Module 1 2 1...

Page 116: ...R see Triple Modular Redundant Toolbox see Control System Toolbox Triple Modular Redundant 2 2 2 14 U UDH see Unit Data Highway UEL see Under Excitation Limiter Under Excitation Limiter 2 1 B 2 Unit Data Highway 1 2 4 19 W Warm backup bridge configuration 2 2 Warranty and Renewal Parts 1 1 A 1 ...

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