Woodward 505XT, Installation And Operation Manual, Page: 6 / 242

Manual 35018V1 505XT Digital Control System for Steam Turbines
Woodward 4
Figure 3-11. Speed PID Control Modes ...................................................................................................... 66
Figure 3-12. Frequency and Unit Load Relationship .................................................................................. 67
Figure 3-13. Speed Relationships ............................................................................................................... 69
Figure 3-14. Load Sharing Logic ................................................................................................................. 75
Figure 3-15. Typical Anti-surge Valve and Speed Feed-Forward Logic Trend .......................................... 79
Figure 3-16. Cascade Functional Diagram ................................................................................................. 80
Figure 3-17. Aux Control Overview ............................................................................................................. 84
Figure 3-18. Extraction/Admission Control Overview ................................................................................. 89
Figure 3-19. Transitions between Speed only and Ratio Limiter Control – Auto Mode .............................. 91
Figure 3-20. Transitions Between Speed Only and Ratio Limiter Control – Manual .................................. 92
Figure 3-21. Extraction/Admission Control Panel ....................................................................................... 93
Figure 3-22. Typical Extraction Steam Map ................................................................................................ 98
Figure 3-23. Typical Admission Steam Map ............................................................................................. 100
Figure 3-24. Typical Extraction & Admission Steam Map ......................................................................... 101
Figure 3-32. Ext/Adm Mode Control Priorities .......................................................................................... 107
Figure 3-33. Configured for Full Decoupled mode (No Map) .................................................................... 108
Figure 3-34. Inlet Steam Pressure Control Overview ............................................................................... 109
Figure 3-35. Exhaust Steam Pressure Control Overview ......................................................................... 110
Figure 4-1. Initial HOME Screen (unit not configured) .............................................................................. 120
Figure 4-2. Configuration Menu – Configuration Mode (Edit) ................................................................... 122
Figure 5-1. Software Architecture ............................................................................................................. 159
Figure 5-2. 505 Splash Screen ................................................................................................................. 160
Figure 5-3. Boot-up to HOME Screen ....................................................................................................... 160
Figure 5-4. Control Mode Architecture ...................................................................................................... 161
Figure 5-5. Mode Screen .......................................................................................................................... 162
Figure 5-6. Navigation Cross .................................................................................................................... 163
Figure 5-7. Service Menu showing “Speed Control” IN-Focus ................................................................. 163
Figure 5-8. Configuration Menu – Operation Mode (View only) ............................................................... 164
Figure 5-9. Configuration Menu – Configuration Mode (Edit) ................................................................... 164
Figure 5-10. Overview Screen .................................................................................................................. 165
Figure 5-11. Speed Control Screen .......................................................................................................... 165
Figure 5-12. Valve Demand Screen .......................................................................................................... 166
Figure 5-13. Controllers Screen ................................................................................................................ 167
Figure 5-14. Cascade Control Screen ...................................................................................................... 167
Figure 5-15. Auxiliary Control Screen ....................................................................................................... 168
Figure 5-16. Inlet Steam Pressure Control Screen ................................................................................... 168
Figure 5-17. Ext/Adm Pressure Control Screen........................................................................................ 169
Figure 5-18. Exhaust Pressure Control Screen ........................................................................................ 170
Figure 5-19. Steam Map Screen ............................................................................................................... 170
Figure 5-20. Steam Map – Mode Popup ................................................................................................... 171
Figure 5-21. Analog Input Summary Screen ............................................................................................. 171
Figure 5-22. Contact Input Summary Screen ........................................................................................... 172
Figure 5-23. Analog Output Summary Screen .......................................................................................... 172
Figure 5-24. Relay Output Summary Screen ............................................................................................ 173
Figure 5-25. Actuator Driver Summary Screen ......................................................................................... 173
Figure 5-26. HOME Menu showing “Startup Curve” IN-Focus ................................................................. 174
Figure 5-27. Overspeed Test Permissives ................................................................................................ 175
Figure 5-28. Internal (505) Overspeed Test .............................................................................................. 176
Figure 5-29. External Overspeed Test ...................................................................................................... 176
Figure 5-30. ALARM Screen ..................................................................................................................... 177
Figure 5-31. Shutdown Summary Screen ................................................................................................. 181
Figure 5-32. Speed Dynamics Adjustment Screen ................................................................................... 183
Figure 5-33. Typical Response to Load Change ...................................................................................... 186
Figure 5-34. Overview of the Automated PID Optimizer Routine ............................................................. 187
Figure 5-35. Optimization Routine Overview Trend .................................................................................. 188
Figure 5-36. Configuration Parameters ‘Configure’ Pop-up ...................................................................... 189
Figure 6-1. ASCII/RTU Representation of 3 ............................................................................................. 197