Basler DECS-250, Instruction Manual

Page: 9 / 352

9440300990 Rev J vii
DECS-250 Contents
Stator Current Limiter .............................................................................................................................. 63
Low-Level Limiting ............................................................................................................................... 63
High-Level Limiting .............................................................................................................................. 63
Initial Delay .......................................................................................................................................... 63
Var Limiter ............................................................................................................................................... 64
Limiter Scaling ......................................................................................................................................... 64
Underfrequency Limiter ........................................................................................................................... 65
Volts per Hertz ..................................................................................................................................... 66
Metering ..................................................................................................................................................... 69
Metering Explorer .................................................................................................................................... 69
HMI ...................................................................................................................................................... 69
BESTCOMS Plus
®
................................................................................................................................ 69
Metered Parameters ................................................................................................................................ 70
Generator ............................................................................................................................................. 70
Power ................................................................................................................................................... 70
Bus ....................................................................................................................................................... 71
Field ..................................................................................................................................................... 72
PSS ...................................................................................................................................................... 72
Synchronization ................................................................................................................................... 73
Auxiliary Control Input .......................................................................................................................... 73
Tracking ............................................................................................................................................... 73
Control Panel ....................................................................................................................................... 74
Metering Summary............................................................................................................................... 75
Status Indication ...................................................................................................................................... 76
System Status ...................................................................................................................................... 76
Inputs ................................................................................................................................................... 77
Outputs ................................................................................................................................................ 78
Network Load Share ............................................................................................................................ 79
Configurable Protection ....................................................................................................................... 79
Alarms .................................................................................................................................................. 80
Real-Time Clock .................................................................................................................................. 83
Auto Export Metering ............................................................................................................................... 84
Event Recorder .......................................................................................................................................... 85
Sequence-of-Events Recording .............................................................................................................. 85
Data Logging ........................................................................................................................................... 85
Setup .................................................................................................................................................... 86
Triggers ................................................................................................................................................ 86
Trending .................................................................................................................................................. 89
Power System Stabilizer ........................................................................................................................... 91
Supervisory Function and Setting Groups............................................................................................... 91
Supervisory Function ........................................................................................................................... 91
Setting Groups ..................................................................................................................................... 91
Theory of Operation ................................................................................................................................. 91
Speed Signal ........................................................................................................................................ 93
Rotor Frequency Calculation ............................................................................................................... 93
Generator Electrical Power Signal ....................................................................................................... 93
Derived Mechanical Power Signal ....................................................................................................... 94
Stabilizing Signal Selection .................................................................................................................. 94
Torsional Filters ................................................................................................................................... 95
Phase Compensation .......................................................................................................................... 95
Washout Filter and Logic Limiter ......................................................................................................... 95
Output Stage ........................................................................................................................................ 96
Terminal Voltage Limiter ...................................................................................................................... 96
Stability Tuning ....................................................................................................................................... 101
AVR Mode ............................................................................................................................................. 101
Predefined Stability Settings .............................................................................................................. 101