Woodward 2301E-HT, Руководство по эксплуатации продукта

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Manual 35092 2301E-HT Hydro (Francis Turbines)
Woodward 30
The intermediate valve gain can also be adjusted using this step test. This gain should only be adjusted
when the unit is de-watered and it is safe to operate the gates. If the 2301E-HT is in Manual or
Maintenance Mode of operation, the step test introduces a step change, in percent gate position, to the
manual gate position.
The step change can be positive or negative. The duration of the step can be adjusted, and when this
adjustable time expires, the step change will always return to zero. This avoids an offset in the speed
reference, in case the step test is accidentally left enabled.
Gate Timer
The 2301E-HT can be used to time the gates when gate timing is being adjusted.
Gate timing can only be done when the unit is de-watered and it is
safe to operate the gates. Gate timing should only be set to the
turbine manufacturer’s specifications.
In order to use the Gate Timer, the 2301E-HT must be in Manual mode. Also, the Gate Timer must be
turned on in the GATE TIMER service menu. In this same menu, the gates can be manually forced to go
to 5% or 95% at the full hydraulic rate.
To measure the opening timing, the gates must be forced to 5%. The timer must be reset in case any
time has been accumulated on the timer. The gates must then be forced from 5% to 95% at full hydraulic
rate. The 2301E-HT measures the time that it takes to the gates to get from 25% gate position to 75%
gate position. This time is then multiplied by two to get the gate timing in the opening direction. This time
can be recorded, or adjustments can be made to the timing.
To measure the closing timing, the timer must be reset to clear the timer value. The gates must then be
forced from 95% to 5% at the full hydraulic rate. The control measures the time it takes for the gates to go
from 75% to 25% and multiplies it by two to get the gate timing in the opening direction.
Table 3-1. Commands
Input/Output
Function I/O
Description
Sequence
to Start
Sequence/
Status to Run
Sequence
to Stop
Emergency
Stop
Input Run/Stop Goes High Stays High Goes Low Goes low
Input
Raise
Speed/Load
Goes Low
Indetermined/Depends
on conditions
Goes Low Goes Low
Input
Lower
Speed/Load
Goes Low
Indetermined/Depends
on conditions
Goes Low Goes Low
Input
Generator
Breaker
Status
Goes Low Goes High Goes Low Goes Low
Input
Emergency
Shutdown
Goes High Stays High Stays High Goes Low
Whatever
other I/O is
needed to get
initial start
XX XX XX XX
Output
Discrete
Ouput 1
Shutdown
Is High Is High Is High Is Low
Released