Woodward 2301E-ST, Инструкция по установке и эксплуатации

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Manual 26694 2301E-ST
Woodward 79
Manual Start The Speed Reference will increase up to the rated speed reference after the
Start Command is issued. The speed of the turbine is controlled by the trip and
throttle valve or control valve until turbine speed reaches speed reference.
Figure 4-4 is an example of a manual start sequence.
1.
Close the Run / Shutdown discrete input, toggle the Reset discrete input,
and close the Start / Unload contact.
2. The speed reference, the valve ramp reference, and the actuator demand
ramp up by the programmed rate to the rated speed reference.
3. By opening the trip and throttle valve or control valve the turbine speed will
increase. The operator has control over where the speed of the turbine is at
by using the trip and throttle valve. This gives the operator a chance to heat
soak the turbine at different speed levels.
4. Continuing to open the trip and throttle valve will cause the speed to
increase until the speed matches the speed reference. The PID controller
will then take over control.
5. The operator can then control the speed of the turbine with the raise and
lower speed discrete inputs.
Figure 4-4 Manual Start-Up
5. Rolling Turbine Restart In Automatic Start mode, the turbine may be re-started, even though the turbine
is still rolling. If a re-start is needed, the only requirement is that the Run contact
is closed, the Reset contact is toggled off to on and the Start contact is toggled
off to on. When the Start contact is set to the Start position, the speed reference
will immediately jump to the actual speed of the turbine. The governor valve will
start opening. The speed of the turbine will start increasing back to Rated Speed.
The speed reference will not jump higher than the Rated Speed value. If the
Start contact is not toggled, and the Reset contact is the only input that is
toggled, the turbine will go through a normal start sequence with the speed
reference slowly ramping up, and the governor valve opening on the valve
limiter.
Released