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Accessories Center
WOODWARD2301 speed adjustment control board


Detailed Description:

WOODWARD 2301D setup, operation manual

26288 (Revision C)

Use WOODWARD 2301D for diesel engine differential speed adjustment control. The related settings and operations are as follows:

Startup process description

The automatic start-up control process is adopted, and the entire process is controlled by the console. The start-up control principle: by identifying that the diesel engine changes from passive to active operation, the automatic start-up control is realized.

The speed of the wind motor is above the ignition speed and below the idling speed. After identifying that the wind motor has reached the ignition speed, the diesel engine will actively run and cooperate with the governor to control the idling speed. At idle speed, start failure is considered.

hardware

Switch input control

1.1 Wiring diagram

1.2 Startup control description

1.2.1 The system is powered on, passed the self-test, and meets the start-up conditions

1.2.2 Terminal 28 is the same as terminal 31 [Stop] The contact is closed

1.2.3 Terminal 28 is separated from terminal 33 [Idle / Rated], other control contacts are separated

1.2.4 Starting the wind motor

1.2.5 When the speed reaches the ignition speed, the diesel engine is actively running.

1.2.6 When the speed reaches the starting control speed, the governor starts to adjust the throttle and gradually controls to idle.

1.2.7 When the speed reaches the idle speed, turn off the wind motor and start successfully

1.2.8 If the idle speed is not reached due to timeout, the startup is considered to have failed and the shutdown process is performed

1.3 Description of operation control

1.3.1 Close the contact of No. 28 terminal and No. 33 terminal [Idle / Rated] (always closed), the governor controls to the rated speed

1.3.2 Terminal No. 28 is the same as Terminal No. 35 [Rising] Terminal 36 [Rising] Jog closed, the speed will rise or fall

1.4 Description of shutdown control

1.4.1 Open the [Idle / Rated] contact of terminal 28 and terminal 33 and wait for the engine speed to drop to the idle speed

1.4.2 Open the [Stop] contact between terminal 28 and terminal 31, and the governor will control to stop.

Note: The [Stop] contact cannot be used for parking directly, because it may directly cut off the oil circuit at the rated high speed, which is not good for the engine, so it must be cut off at low idle speed to stop the engine and stop the engine. purpose.

Do not use the [Stop] contact for emergency stop to prevent the actuator from getting stuck and fail to achieve the emergency stop purpose.

Note: When analog line control is not used, the analog line should be set to not used.

2. Analog input control

2.1 Wiring diagram

2.2 4mA-20mA startup control description

2.2.1 The system is powered on, passed the self-test, and meets the start-up conditions

2.2.2 Terminal No. 28 is the same as Terminal No. 31 [Stop] The contact is closed (normally closed contact)

2.2.3 Add 4mA current to start the wind motor,

2.2.4 When the speed reaches the ignition speed, the diesel engine is actively running (what is the ignition speed? The theoretical value is 158rpm)

2.2.5 When the speed reaches the starting control speed, the governor starts to adjust the throttle and gradually controls to idle.

2.2.6 When the speed reaches the idling speed, turn off the wind motor and start successfully (it should be to turn off the air motor after normal startup, why should it be turned off after reaching idling speed?)

2.2.7 If the idling speed is not reached after timeout, it is considered that the startup has failed and the shutdown process is performed (the startup fails / the ignition is turned off / the air motor is turned off / powered off and waiting to start again, the startup failure does not need to stop)

2.3 Description of operation control

2.3.1 4mA-20mA corresponding idling to rated speed control

2.4 Description of shutdown control

2.4.1 Reduce the current to 4mA, wait for the engine speed to drop to idle speed

2.3.2 Open the [Stop] contact between terminal 28 and terminal 31, and the governor will control to stop.

2.5 4mA-20mA corresponds to the software set speed. Generally, 4mA corresponds to idle speed, 20mA corresponds to rated speed. Above, 4mA corresponds to idle speed, and 20mA corresponds to rated speed.

Note: The [Stop] contact cannot be used for parking directly, because it may directly cut off the oil circuit at the rated high speed, which is not good for the engine, so it must be cut off at low idle speed to stop the engine and stop purpose.

Do not use the [Stop] contact for emergency stop to prevent the actuator from getting stuck and fail to achieve the emergency stop purpose. (How to set up the emergency stop? It didn't show up)

software

Software operation content is divided into two categories, namely: Service (Service) and Confingure (Configuration), according to Service (Service) and Confingure (Configuration) related content, for the sake of easy to understand, Service (Service) is translated into display and settings Confingure (configuration) is translated into configuration settings, other translations are based on the original intent, industry terms are preferred, and some are translated for quick understanding, with some additions or deletions. If you don't understand it, please refer to the software and random manuals. There is no English comparison here. Only the main content related to speed control needs to be changed. The others remain the default and do not affect the speed control (confirmed by the agent technicians). I hope that I will have time to clarify all the parameters related to speed control.

Also, make clear the parameters of unused functions, avoid possible cross-parameter effects (that is, use one parameter for more than two functions), and whether you can turn off unused functions. Only after clarifying all the parameters, can it be used safely.

3. Display and setting instructions service confingure

3.1 Display (A) A ** display menu **

3.1.1 Item 1: engine speed display (n revolutions / minute) engine speed (rpm)

3.1.2 Item 3: Current set speed of the engine (n revolutions per minute) speed reference (rpm)

3.1.3 Item 4: Current fuel quantity display (0.00%) fuel demand (%)

3.2 Speed settings (G) G ** speed settings **

3.2.1 Item 1: Speed governor start control speed, the value should be greater than the engine ignition speed and less than the idle speed (n revolutions / minute)

start speed (rpm)

3.2.2 Item 2: maximum speed limit (n revolutions / minute) raise speed limit (rpm)

3.2.3 Item 3: Minimum speed limit (n revolutions per minute) (not lower than idle speed) lower speed limit (rpm)

3.2.4 Item 4: idle speed setting (n / min) idle speed (rpm)

3.2.5 Item 5: Terminal 28 and Terminal 33 [Idle / Rated] The contact is closed, and the time from idling to rated speed (n seconds) accel ramp time (sec)

3.2.5 Item 6: The contact between terminal 28 and terminal 33 [idle / rated] is separated from the rated speed to idling time (n seconds) decel ramp time (sec)

3.2.6 Item 7: Terminal No. 28 is closed with Terminal No. 35 [Speed], the time from the lowest to the highest speed (n seconds)

speed trim inc time (sec)

3.2.7 Item 8: Terminal No. 28 is closed with Terminal No. 36 [speed reduction], time from highest to lowest speed (n seconds)

speed trim dec time (sec)

3.3 Dynamic parameter setting (H) H * DYNAMICS * (This module has other functions, but is the supporting actuator complete?

3.3.1 Item 1: Idle Speed Gain (P = n.nn) PROP GAIN (The controller responds quickly to the deviation between the engine speed and the reference speed setting. The gain setting provides the engine with light load or unloading conditions. Steady state control.

3.3.2 Item 2: Rated Speed Gain (P = n.nn) reset

3.3.3 Item 3: Integral (I = n.nn) actuator compensation

3.3.4 Item 4: Differential (D = n.nn) windowwidth

3.3.5 Item 5: Auxiliary gain adjustment Speed fluctuation range (n revolutions / minute) gain ratid

3.3.6 Item 6: Auxiliary gain adjustment ratio (P = n.nn) speed filter freq

3.4 Fuel limit settings (L) L * fuel limiters

3.4.1 Item 1: start fuel limit (n%)

3.4.2 Item 2: On the basis of item 1 being restricted, the fuel will increase by this value every second (n% seconds) start ramp rate

3.4.3 Item 4: Max fuel limit (n%) max fuel limit

3.5 Analog input settings (P) P * analog inputs settings *

3.5.1 Item 3: Minimum speed (n revolutions / minute) corresponding to 4mA speed w / rmt in @ min (rpm)

3.5.2 Item 4: Maximum speed corresponding to 20mA (n revolutions / minute) speed w / rmt in @ max (rpm)

3.5.3 Item 6: Ramp time (n seconds) required from minimum speed to maximum speed rmt spdref inc time (sec)

3.3.4 Item 7: Deceleration time (n seconds) required from maximum speed to minimum speed rmt spdref dec time (sec)

4. Configuration setting instructions

5.

4.1 Control function (A) A * engine & speed control *

4.1.1 Item 1: Rated speed setting (n revolutions / minute) enter rater speed (rpm)

4.1.2 Item 7: Overspeed protection setting. When the engine reaches this speed, a stop command (n rpm) is triggered. The overspeed setting must be independent of the control system of the prime mover. Overtemperature or overpressure shutdown device It must also be safe and appropriate.

4.2 Engine Parameter Setting (B) B * diacrete in options *

4.2.1 Item 1: Number of Flywheel Teeth (n)

4.2.2 Item 3: Number of engine cylinders (n)

4.2.3 Item 4: Failure rate of speed sensor (n%)

4.2.3 Item 8: Number of engine strokes (n)

4.3 Analog input settings (E)

4.3.1 Item 2: Analog input line 1 setting (n) (see the random manual P55 E02)

4.3.2 Item 4: Set the input type (n) of line 1 (see the manual P55 E04)

4.3.3 Item 7: Analog input line 2 setting (n) (refer to the manual P55 E07)

4.3.4 Item 9: Set the input type (n) of line 2 (see the manual P55 E09)

4.3 actuator output type (F)

4.4.1 Item 1: Type of actuator output (n) (see the manual P56F01)

other

5.1 Must be set up correctly in accordance with the WOODWARD manual and related software definitions

5.2 Before starting the machine, ensure that the governor parameters are correct

5.3 After the governor is powered on, there is a non-reaction period of 25 seconds, and the governor status light is on for 25 seconds at the same time.

5.4 The new sample machine should ensure that the speed sensor signal used by the governor is normal

5.4.1 When idling, the signal should be greater than 1V, the duty cycle is 50%, and the error is less than or equal to ± 10%. At the rated speed, the signal should be less than 30V, the duty cycle is 50%, and the error is less than or equal to ± 10%.

5.4.2 Signal without distortion, zero crossing without distortion

5.4.3 The distance between the speed sensor and the engine gear and the engine flywheel tooth width should meet the requirements of WOODWARD Manual 82510 (what is the distance)

5.5 Because the theoretical mathematical model of the diesel engine is far from the actual situation, the trial and error method is used to adjust the PID

If there is any objection to the text, a seminar should be organized to correct the mistake in a timely manner.

The operating instructions have detailed expressions of the principles and wiring methods, but the parameters are set after installation.

Initial setting of the potentiometer on the 2301A panel

a. Rated speed potentiometer (Rated speed), adjust the speed setting potentiometer R1 on the door of the generator set control to the middle position (5 turns), set the rated speed potentiometer to the minimum position, after the diesel engine speed, Adjust it to make the diesel engine reach the rated speed of 1500rpm, and rotate it clockwise to increase the speed.

b. Low Idle Speed, set to the maximum position, and increase the idle speed clockwise.

c. Initial Fuel Limit Potentiometer (Start Fuel Limit), placed at the maximum position, increasing the initial value clockwise.

d. Ramp Time, make it at the minimum position, and increase the time clockwise.

e. Gain potentiometer (Gain) and stability potentiometer (Reset), placed in the middle position. The rapid potentiometer (Actuator Compensation) is placed on a scale in the range of 0 to 2, and the performance is enhanced in a clockwise direction.

f. Load Gain (Load Gain), placed in the middle position, increase the load output signal clockwise.

g. Adjust the potentiometer (Droop) at the minimum position and increase the adjustment clockwise.

(3) Stable speed adjustment

a. If the diesel engine oscillates quickly, you should slowly decrease the Gain potentiometer counterclockwise until it stabilizes.

b. If the diesel engine is wandering slowly, increase the stability (Reset) clockwise until it is stable.

If increasing the stability potentiometer does not improve the stability of the diesel engine, you also need to slowly decrease the gain potentiometer or the gain and speed (Actuator Compensation) potentiometers are gradually reduced.

c. A small range of slow instability should increase the Actuator Compensation potentiometer clockwise, and a small range of fast instability should decrease the rapid potentiometer counterclockwise.

(4) Dynamic speed adjustment

a. Adjust the gain and stability potentiometers to obtain the best dynamic response for speed changes.

b. Monitor the DC voltage output by 20 # (A +) and 21 # (B-) for the actuator with a high-sensitivity voltmeter.

c. Increasing the gain potentiometer can provide a fast transmission response to the speed change when the load is abrupt. Slowly increase the gain potentiometer clockwise until the voltage on the monitors 20 # and 21 # shows slight instability, and then Turn down the gain potentiometer counterclockwise to make the voltage on the monitoring meter stable and readable.

d. To reduce the actuator vibration after loading, increase the stability potentiometer clockwise.

e. When the stability potentiometer is adjusted within the range of 0 to 3, if the stability potentiometer is increased clockwise, it may also be necessary to reduce the gain counterclockwise to maintain stable operation.

f. If the dynamic response speed of the diesel engine is slow, the stability potentiometer should be adjusted counterclockwise to reduce the integration time constant so that the diesel engine can quickly reach the equilibrium state.

(5) Adjustment of idle speed and rated speed

The diesel engine works in a stable state. The speed control potentiometer on the control cabinet door of the generator set is placed in the middle position. In the idle state, adjust the Low Idle Speed potentiometer to the required value of 600rpm. Under the rated state, adjust the rated speed potentiometer (Rated Speed) so that the required value is 1500 rpm.

(6) Initial fuel limit potentiometer adjustment

a. If you do not need to apply the initial fuel limit, you can eliminate the function by turning the Start Fuel Limit potentiometer clockwise to the maximum.

b. When the diesel engine is running without load at the rated speed, record the governor 20 # (+) and 21 # (-) as the output voltage of the actuator.

c. Shut down the diesel engine, add a short wire between governor 16 # and 18 #, add 18V + 24V power to 18 #, and make it exit the lost speed signal protection. Adjust the initial fuel limit potentiometer so that 20 # and 21 # are 1.3 times the output voltage of the actuator and its rated value.

d. Remove the short wiring between 16 # and 18 #. Start the diesel engine and observe its starting time, speed overshoot, and exhaust conditions. If it is difficult to start the diesel engine, increase the initial fuel limit potentiometer clockwise until it can start. When the diesel engine starts with excessive smoke, the initial fuel limit potentiometer should be slightly reduced counterclockwise. At the same time, it should be able to start in cold and hot conditions. Although the initial fuel limit potentiometer can be increased to make starting easy, once the speed control is dominant, the fuel limit function will not work.

(7) Adjustment of rise time

Turning up the ramp-up time potentiometer (Ramp Time) clockwise can increase the ramp-up time of the diesel engine from idling state to rated state. This potentiometer should be adjusted to obtain the required rise time.

(8) Adjustment of load gain

Make each diesel generator set with a rated load, adjust the load gain potentiometer (Load Gain), make the governor 13 # (+) and 11 # (-) load signal output voltage is 6V, when the load is half load Under 3V.

(9) Adjustment of adjustment characteristics

a. After the load gain of each machine is adjusted, adjust the potentiometer (Droop) so that the frequency difference between the no-load and full-load states of each unit is the required value, such as 3%.

b. The speed-adjusting potentiometer R2 on the control cabinet door of each generator set is not moved in the middle position. Adjust the rated speed potentiometer (Rated Speed) of each machine so that the no-load frequency is 51.5Hz, and adjust the droop potentiometer (Droop) of each machine so that the full-load frequency is 50Hz. The adjustment rate is 3%.

c. The speed control potentiometer R2 on the control cabinet door of each generator set is placed in the middle position and does not move. First run each unit independently without load, and adjust the rated speed potentiometer (Rated Speed) on the governor to make the frequency 51.5Hz. Run each unit separately at full load and adjust the Droop to make the frequency 50Hz. Short-circuit the governor 14 # and 16 #, turn on the + 24V power supply at 14 #, and the governor system runs under the state of no-difference adjustment. In this operating state, the full-load frequency of the system will rise to the no-load frequency of 51.5Hz. Finally, remove the short wiring between 14 # and 16 #, and the full load frequency is reduced to 50Hz. Multi-machine grid-connected operation must have poor adjustment characteristics to make the load of each machine evenly distributed. When the system load is changed, each unit distributes the load according to the frequency in the adjustment characteristic curve, the adjustment characteristics are consistent, and the no-load speed is equal, the load of each unit can be balanced.

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