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  • 1. D-EHC 6. D-EHC Steam Turbine Digital Electro Hydraulic Control System   1
  • 2. D-EHC CONTENTS Contents of this lecture 1. Outline of the D-EHC System 2. Outline of the D-EHC function block 3. Outline of the D-EHC operation 4. Detailed explanation of the D-EHC functions •Speed control •Load control •Valve position control •Line Speed Matching •IPR •Turbine Protection 5. Hardware configuration 6. Explanation of the Maintenance Tool 7. What to do if the D-EHC fails 2
  • 3. D-EHC 1. Outline of the D-EHC System 3 OUTLINE OF THE D-EHC SYSTEM
  • 4. D-EHC OUTLINE OF THE D-EHC SYSTEM 1. Outline of the D-EHC System -Outline of the D-EHC Configuration Graphic CRT Display Service Thermal Stress Monitoring TSI Monitoring EHC Operation SUPERVISIN G CONTROLLE R TSI MONITOR TURBINE TRIP LOGIC SYSTEM CONTROLLE R Speed Control Load Control Initial Pressure Regulator (IPR) Main Stop Valve Position Control Control Valves Position Control Reheat Stop Valves Position Control Intercept Valves Position Control MASTER CONTROLLE R MSV IVs 4 Human-Machine Interface DCS and TSI Interface(Modbus) Automatic Load Regulator(ALR) CVs RSVs Fig.4 Outline of EHC Configuration
  • 5. D-EHC OUTLINE OF THE D-EHC SYSTEM 1. Outline of the D-EHC System -Outline of the D-EHC Cabinet 5
  • 6. D-EHC OUTLINE OF THE D-EHC SYSTEM 1. D-EHC Cabinet Internal Configuration Power Supply Master Controller Power Supply System Controller Power Supply Trip Logic Power Supply Master Controller Power Supply System Controller Power Supply Trip Logic Master Controller A System Controller A Master Controller B System Controller B Isolator Unit Interface Unit Trip Logic TSI Unit Circuit Protection Circuit Protection Circuit Protection DEHC Cabinet C DEHC Cabinet D Circuit Protection Circuit Protection DEHC Cabinet A 6 DEHC Cabinet B
  • 7. D-EHC OUTLINE OF THE D-EHC SYSTEM 1. Outline of the D-EHC System -Arrangement of the D-EHC Cabinet 6
  • 8. D-EHC OUTLINE OF THE D-EHC FUNCTION BLOCK 2. Outline of the D-EHC Function block ALR SET GOV ERNOR ALR INCDEC REASE REASE HOLD 1% /MIN 2% /MIN 4% /MIN 5% /MIN LOAD cha nging ra te set ALR set GEN. MW 6 /% MI N DCS INCDEC REAS E REAS E Loa d cont rol De ma nd + Governor se t - *1 VALVE POSITION CO NTROLLER LOAD CON TRO LLER IV- L Position Dema nd S PEED CO NTROLLER V ALV E S C LOS E D 400 RPM 800 RPM Speed r eference se t Turbine spe ed A B C 3000 RPM HOLD SLOW CV / IV MEDIFAST UM Accel era tion ra te se t IV-R Position Dema nd S pe ed ga in + - + + LVG M VG Ra t ed spee d set + + S peed ga i n LOAD LIMIT M a in st ea m pressure C control block diagram *1 L DEC INCREAS E REASE O ver spee d test bia s 7 IV flow control V Loa d limit se t IPR contr ol CV flow control CV Posit ion Dema nd G M VG : Mid d le Va lue Ga te LVG : Low Va lue Ga te ALR : Automa t ic Loa d Regula tor
  • 9. D-EHC OUTLINE OF THE D-EHC OPERATION 3. Outline of the D-EHC Operation -Manual Start-up Sequence 8
  • 10. D-EHC 3. Outline of the D-EHC Operation 9 OUTLINE OF THE D-EHC OPERATION -Automatic Start-up Sequence
  • 11. D-EHC DETAILED EXPLANATION OF THE D-EHC FUNCTIONS 4. Detailed explanation of the D-EHC functions block ALR SET GOV ERNOR ALR INCDEC REASE REASE HOLD 1% /MIN 2% /MIN 4% /MIN 5% /MIN LOAD cha nging ra te set ALR set GEN. MW 6 /% MI N -Outline of the control DCS INCDEC REAS E REAS E Loa d cont rol De ma nd + Governor se t - *1 VALVE POSITION CO NTROLLER LOAD CON TRO LLER IV- L Position Dema nd S PEED CO NTROLLER V ALV E S C LOS E D 400 RPM 800 RPM Speed r eference se t Turbine spe ed A B C 3000 RPM HOLD SLOW Accel era tion ra te se t IV flow control IV-R Position Dema nd S pe ed ga in + - + LVG M VG Ra t ed spee d set + + + S peed ga i n LOAD LIMIT *1 M a in st ea m pressure L DEC INCREAS E REASE O ver spee d test bia s 10 CV / IV MEDIFAST UM V Loa d limit se t IPR contr ol CV flow control CV Posit ion Dema nd G M VG : Mid d le Va lue Ga te LVG : Low Va lue Ga te ALR : Automa t ic Loa d Regula tor
  • 12. D-EHC DETAILED EXPLANATION OF THE D-EHC FUNCTIONS 4. Detailed explanation of the D-EHC functions    block 11 -Speed control
  • 13. D-EHC DETAILED EXPLANATION OF THE D-EHC FUNCTIONS 4. Detailed explanation of the D-EHC functions -Speed control chart 12
  • 14. D-EHC DETAILED EXPLANATION OF THE D-EHC FUNCTIONS 4. Detailed explanation of the D-EHC functions 13 -Over speed test
  • 15. D-EHC DETAILED EXPLANATION OF THE D-EHC FUNCTIONS 4. Detailed explanation of the D-EHC functions 14 -Load control
  • 16. D-EHC DETAILED EXPLANATION OF THE D-EHC FUNCTIONS 4. Detailed explanation of the D-EHC functions -Governor and ALR block 15
  • 17. D-EHC DETAILED EXPLANATION OF THE D-EHC FUNCTIONS 4. Detailed explanation of the D-EHC functions -IV Position demand 16
  • 18. D-EHC DETAILED EXPLANATION OF THE D-EHC FUNCTIONS 4. Detailed explanation of the D-EHC functions -Valve position control block 17
  • 19. D-EHC DETAILED EXPLANATION OF THE D-EHC FUNCTIONS 4. Detailed explanation of the D-EHC functions -Valve position vs. Turbine speed 18
  • 20. D-EHC DETAILED EXPLANATION OF THE D-EHC FUNCTIONS 4. Detailed explanation of the D-EHC functions FREQUENCY DEVIATION LINE PT (LINE f) TURBINE SPEED (GEN. f) Δf DETECTOR Δ LINE SPEED MATCHING BIAS (0.075Hz) -Line speed matching A GEN. f (50.075Hz) LSM ON LSM OFF (& 52G OPEN) GEN. f LINE SPEED MATCHING SIGNAL 65 LINE. f LINE f GEN. f t LINE f (50Hz) GEN. f (50Hz) 19 t MATCHING LINE f (50Hz)
  • 21. D-EHC DETAILED EXPLANATION OF THE D-EHC FUNCTIONS 4. Detailed explanation of the D-EHC functions 20 -IPR
  • 22. D-EHC DETAILED EXPLANATION OF THE D-EHC FUNCTIONS 4. Detailed explanation of the D-EHC functions -Governor Follow Up Regulator 21
  • 23. D-EHC DETAILED EXPLANATION OF THE D-EHC FUNCTIONS 4. Detailed explanation of the D-EHC functions -Load Limit Follow Up Regulator 22
  • 24. D-EHC DETAILED EXPLANATION OF THE D-EHC FUNCTIONS 4. Detailed explanation of the D-EHC functions -Power Load Unbalance A B C D E 23
  • 25. D-EHC DETAILED EXPLANATION OF THE D-EHC FUNCTIONS 4. Detailed explanation of the D-EHC functions -Turbine Protection MOP A/B STOP TRIP 2S MFT DCS TRIP SIGNAL EMER TRIP PB OVER SPEED T/G BEARING VIBRATION HIGH HIGH 3S EXHAUST HOOD TEMPERTURE HIGH EHC OIL PRESSURE LOW CONDENSER VACUUM LOW 86.L.O RELAY TRIP BEARING OIL PRESSURE LOW THRUST BEARING WEAR TRIP MT-EHC HEAVY FAILURE BACK UP OVER SPEED TURBINE TRIP PB EOP DC POWER FAILURE RESET PB 24 RESET CIRCUIT FASV1A FASV1B FASV2A FASV2B MSV
  • 26. D-EHC HARDWARE CONFIGURATION OF THE D-EHC 5. Hardware configuration of the D-EHC -D-EHC system configuration 25
  • 27. D-EHC HARDWARE CONFIGURATION OF THE D-EHC 5. Hardware configuration of the D-EHC -D-EHC power supply configuration AC230V (UPS) DC125V (Emergency DC) AC100V SYSTEM CONTROLLER A (AC +DC)/ DC PIO (AC +DC)/ DC AC100V SYSTEM CONTROLLER B MASTER CONTROLLER A (AC +DC)/ DC VALVE INTERFACE / COMMON SEQUENCE LOGIC MASTER CONTROLLER B (AC +DC)/ DC AC100V TSV-A AC / DC TRIP LOGIC DC / DC AC100V AC100V TSV-B AC/DC TRIP INTERFACE (DC125V) EXTERNAL INTERFACE DC SOLENOID DC125V (Emergency DC) AC / DC TSI-1 AC / DC AC230V (UPS) TSI-2 DC / DC DC / DC AC100V EHC HUB 26 Local Desk OPERATOR STATION
  • 28. D-EHC EXPLANATION OF THE MAINTENANCE TOOL 6. Explanation of the Maintenance tool ction of the Logic Tool for TOSMAP-DS ogramming Functions ・LOGIC CHART ・COMPILE ・LIST DISPLAY ・CPU DOWNLOAD / COMPARE ・MO READ / WRITE / COMPARE est Functions ・MONITOR ・TUNING ・SIMULATION ・ERROR LOG :Programs the Control Logic by the Editor Based on CAD :Creates a Load Module Based on the Logic Charts :Displays Various Information in a List Format :Downloads the Program Data to the Controller and / or Reads the Data from the Controller and Compares it :Saves onto / Reads from / Compares with an MO Disk :Displays the State of the Controller On-line Using the Logic Chart, Trend Graphs or List Format :Changes Parameters during Monitoring :Checks Program Execution with Register Simulation :Reads and Displays Error Log Information ocument Output Functions •PRINT CHART :Outputs Logic Charts and Other Drawings by a Windows NT-Supported Printer 27
  • 29. D-EHC EXPLANATION OF THE MAINTENANCE TOOL 6. Explanation of the Maintenance tool Main Menu Window Analog Trend Window Logic Chart Window 28 Error Log Window
  • 30. D-EHC EXPLANATION OF THE MAINTENANCE TOOL 6. Explanation of the Maintenance tool Selecting Error Log Window of E500XP 29
  • 31. D-EHC EXPLANATION OF THE MAINTENANCE TOOL 6. Explanation of the Maintenance tool Error Log Window of E500XP 30
  • 32. D-EHC EXPLANATION OF THE MAINTENANCE TOOL 6. Explanation of the Maintenance tool Function of TOSMAP-GS/RE300XP 1. Programming Functions ・LOGIC EDITOR ・COMPILE ・SET VALUES EDITOR ・WRITE & COMPARE ・BACK UP TO FD ・LOAD FROM FD 2. Test Functions ・MONITOR :Programs the Control Logic by the Editor Based on CAD :Creates a Load Module Based on the Logic Charts :Creates and Changes Set Values :Downloads the Program Data to the Controller and/or Reads the Data from the Controller and Compares it :Saves the Program Data onto Floppy Disks :Reads the Program Data from Floppy Disks :Displays the State of the Controller On-line Using the Logic Chart, Trend Graph, or List Format ・TUNING :Change Parameters during Monitoring ・TRANSIENT :Displays the Transient Response Signal Data Set :for the Controller ・RESPONCE ・ERROR LOG :Reads and Displays Error Log Information 3. Document Output Functions •PRINT CHART :Outputs Logic Charts and Other Drawings by a Windows NT-Supported Printer 31
  • 33. D-EHC EXPLANATION OF THE MAINTENANCE TOOL 6. Explanation of the Maintenance tool Individual Engineering Tool TOSMAP-GS/RE300XP ・RE300XP is an engineering tool used for programming, tests and preparation of documents for TOSMAP-GS / R300XP. ・RE300XP runs on the laptop computer DynaBook. TOSMAP-GS/R300XP   DDCP03 board B connector   9pin TOSMAP-GS/RE300XP                            9pin                        RS232C cable                   AC100V Maintenance Tool Connection 32
  • 34. D-EHC EXPLANATION OF THE MAINTENANCE TOOL 6. Explanation of the Maintenance tool Main Menu Window Block Monitor Window 33 Transient Response Graph Window Error Log Window
  • 35. D-EHC EXPLANATION OF THE MAINTENANCE TOOL 6. Explanation of the Maintenance tool Selecting Error Log Window of RE300XP 34
  • 36. D-EHC EXPLANATION OF THE MAINTENANCE TOOL 6. Explanation of the Maintenance tool Error Log Window of RE300XP 35
  • 37. D-EHC TROUBLESHOOTING 7. What to do, if the D-EHC fails. If the D-EHC fails, check the following items and inform Toshiba of the status. 1. Read Error Logs from Both System Controller and Master Controllers (This item has be explained in section 7 Explanation of the maintenance tool) 2. Check the Indication of Operator Station 3. Check the LED Indication of the PCBs of D-EHC 36
  • 38. D-EHC 7. What to do, if the D-EHC fails. 37
  • 39. D-EHC 7. What to do, if the D-EHC fails. 38
  • 40. D-EHC 7. What to do, if the D-EHC fails. TROUBLESHOOTING -PCB Arrangement 3. Check the LED Indication of the PCBs of D-EHC 39
  • 41. D-EHC TROUBLESHOOTING 7. What to do, if the D-EHC fails. -Front panel of the CPUW01 3. Check the LED Indication of the PCBs of D-EHC Description of LEDs RUN : Normal ERR : Error INIT/TEST : Initial Loading / Testing PRM : Primary system in duplex configuration STBY : Standby system in duplex configuration B. ALM 40 : Battery voltage fall
  • 42. D-EHC 7. What to do, if the D-EHC fails. TROUBLESHOOTING -Front panel of the DDCP03 3. Check the LED Indication of the PCBs of D-EHC 41
  • 43. D-EHC APPENDIX Appendix -CRT Operation of the D-EHC (for T/G Workstation) System Status Bar Model Type Alarm Indicator MW Indicator Date / Time Menu Bar Window title Work Space Operation mode indicator Task Bar 42
  • 44. D-EHC APPENDIX Appendix -CRT Operation of the D-EHC (for T/G Workstation) Menu Bar Pull down menu 43
  • 45. D-EHC APPENDIX Appendix -CRT Operation of the D-EHC (for T/G Workstation) Selectable Buttons Cancel or Execute 44
  • 46. D-EHC APPENDIX Appendix -Graphic Display of the D-EHC Load Control This window is used for Load Control during the normal turbine operation: GOVERNOR operation, LOAD LIMITER operation, ALR operation and so on. 45
  • 47. D-EHC APPENDIX Appendix -Graphic Display of the D-EHC Valve Test This window is used for conducting the valve test and   trip function test. While the “TEST” button is being depressed, the corresponding valve is closed. 46
  • 48. D-EHC APPENDIX Appendix -Graphic Display of the D-EHC Manual Start up This window is used for the turbine manual start up. The operator can select the speed reference , the acceleration rate , and so on. 47
  • 49. D-EHC APPENDIX Appendix -Graphic Display of the D-EHC Auto Start up This window is used for the turbine automatic start up. A start up step monitor indicates the start up stop,and so on. 48
  • 50. D-EHC APPENDIX Appendix -Graphic Display of the D-EHC Control Block Diagram This windows displays the process and control valves on the D-EHC control block diagram. 49
  • 51. D-EHC APPENDIX Appendix -Graphic Display of the D-EHC Turbine Overview This windows displays the shematic display around the turbine and the main process valves such as main steam pressure and valve positions. 50
  • 52. D-EHC APPENDIX Appendix -Graphic Display of the D-EHC Trend Graph This windows displays the trend curves of the main parameters. The trend graph is able to display up to eight curves at once. 51
  • 53. D-EHC APPENDIX Appendix -Graphic Display of the D-EHC Thermal Stress Monitor This windows displays the turbine thermal stress valves and related process valves. The tempertures and the stress can be displayed as trend curves,as well. 52
  • 54. D-EHC APPENDIX Appendix -Graphic Display of the D-EHC Alarm Monitor This windows displays the detected alarm messages. 53
  • 55. D-EHC APPENDIX Appendix -Graphic Display of the D-EHC Alarm Location Monitor This windows displays the location of unit related to the D-EHC hard ware alarms. 54
  • 56. D-EHC APPENDIX Appendix -Transient Response Recording CRT Maintenance PB in the menu bar Recording Condition Turbine Trip Gen Circuit Breaker Open Reset Condition Monitor Panel Reset Recording Item Transient Response Graph Window Turbine speed MSV Position CV Position ECV Position LPCV Position Gen Output Main Steam Press. EXT Steam Press. Gov. Set LL Set etc. This is an example display of the transient response recording. This graph window is produced by the maintenance tool for master controller,RE300XP. 55
  • 57. D-EHC END 56 D-EHC