186
9440300990 Rev J
Testing
DECS-250
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FcrState
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FvrErr
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FvrOut
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FvrState
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G Hz: Generator Frequency {Hz}
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I1: Positive Sequence Current {pu}
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I2: Negative Sequence Current {pu}
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Ia: Phase A Current {pu}
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Iaux: Cross Current Input {pu}
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Iavg: Ave Line Current{pu}
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Ib: Phase B Current {pu}
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Ic: Phase C Current {pu}
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Ifd: Field Current {pu}
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kVA: Total Power {pu}
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kvar: Reactive Power {pu}
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kW: Real Power {pu}
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MechP: Filtered Mechanical Power
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Network Load Share
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NullBalance: Null Balance Level
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OelOutput: OEL Controller Output
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OelRef
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OelState
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PF: Power Factor
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PositionInd: Position Indication {pu}
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Post: Post-Limit Output {pu}
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POut: Final PSS Output {pu}
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Prelim: Pre-Limit Output {pu}
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PsskW: PSS Electric Power {pu}
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Ptest: Time Response Signal {pu}
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SclOutput: SCL Controller Output
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SclRef
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SclPfRef
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SclState
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Synth: Synthsized Speed {pu}
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TermF: Terminal Frequency Deviation
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Test: Frequency Response Signal {pu}
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Tflt1: Torsional Filter #1 {pu}
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TrnOp: Internal State {pu}
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UelOutput: UEL Controller Output
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UelRef
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UelState
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V1: Positive Sequence Voltage {pu}
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V2: Negative Sequence Voltage {pu}
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Vab: PhA-PhB L-L Voltage {pu}
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Var/PfErr
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Var/PfOut
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Var/PfState
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VarLimOutput: Var Limiter Output
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VarLimRef
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VarLimState
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Vaux: Aux Voltage Input {pu}
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Vavg: Ave L-L Voltage {pu}
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Vbc: PhB-PhC L-L Voltage {pu}
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Vbus: Bus Voltage {pu}
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Vca: PhC-PhA L-L Voltage {pu}
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Vfd: Field Voltage {pu}
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Vtmag: PSS Term Voltage
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WashP: Washed Out Power
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WashW: Washed Out Speed {pu}
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x10: Mechanical Power LP #3
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x11: Mechanical Power LP #4
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x15: Lead-Lag #1 {pu}
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x16: Lead-Lag #2 {pu}
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x17: Lead-Lag #3 {pu}
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x2: Speed HP #1
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x29: Torsional Filter #2 {pu}
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x31: Lead-Lag #4 {pu}
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x5: Power HP #1 {pu}
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x7: Mechanical Power {pu}
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x8: Mechanical Power LP #1
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x9: Mechanical Power LP #2
Frequency Response
Read-only frequency response fields indicate the magnitude response, phase response, and test signal
frequency. The magnitude response and phase response corresponds to the test signal previously
applied. The test frequency value reflects the frequency of the test signal currently being applied.
Caution
Exercise caution when performing frequency response testing on a
generator connected to the grid. Frequencies that are close to the
resonant frequency of the machine or neighboring machines are to be
avoided. Frequencies above 3 Hz may correspond to the lowest shaft
torsional frequencies of a generator. A torsional profile for the machine
should be obtained from the manufacturer and consulted before
conducting any frequency response tests.
Time Response
Tests should be performed at various load levels to confirm that the input signals are calculated or
measured correctly. Since the PSS function uses compensated terminal frequency in place of speed, the
derived mechanical power signal should be examined carefully to ensure that it does not contain any
Содержание DECS-250
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Страница 6: ...iv 9440300990 Rev J Revision History DECS 250 ...
Страница 16: ...xiv 9440300990 Rev J Contents DECS 250 ...
Страница 20: ...4 9440300990 Rev J Introduction DECS 250 ...
Страница 28: ...12 9440300990 Rev J Power Stage DECS 250 ...
Страница 32: ...16 9440300990 Rev J Voltage and Current Sensing DECS 250 ...
Страница 40: ...24 9440300990 Rev J Synchronizer DECS 250 ...
Страница 52: ...36 9440300990 Rev J Auxiliary Control DECS 250 ...
Страница 56: ...40 9440300990 Rev J Contact Inputs and Outputs DECS 250 ...
Страница 84: ...68 9440300990 Rev J Limiters DECS 250 ...
Страница 108: ...92 9440300990 Rev J Power System Stabilizer DECS 250 Figure 85 PSS Function Blocks and Software Switches ...
Страница 114: ...98 9440300990 Rev J Power System Stabilizer DECS 250 Figure 96 PSS Parameter Settings ...
Страница 124: ...108 9440300990 Rev J Stability Tuning DECS 250 ...
Страница 126: ...110 9440300990 Rev J Mounting DECS 250 Figure 103 Overall and Projection Mounting Dimensions ...
Страница 127: ...9440300990 Rev J 111 DECS 250 Mounting Figure 104 DECS 250 Escutcheon Plate Dimensions ...
Страница 128: ...112 9440300990 Rev J Mounting DECS 250 Figure 105 Panel Cutting and Drilling Dimensions for DECS 250 Panel Mounting ...
Страница 198: ...182 9440300990 Rev J Timekeeping DECS 250 ...
Страница 210: ...194 9440300990 Rev J CAN Communication DECS 250 ...
Страница 304: ...288 9440300990 Rev J Maintenance DECS 250 ...
Страница 316: ...300 9440300990 Rev J Specifications DECS 250 ...
Страница 334: ...318 9440300990 Rev J Analog Expansion Module DECS 250 ...
Страница 341: ...9440300990 Rev J 325 DECS 250 Contact Expansion Module Figure 188 CEM 2020 Input Contact and Output Contact Terminals ...
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