Woodward 2301A Installation And Operation Manual
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Woodward 2301A Installation And Operation Manual

Woodward 2301A Installation And Operation Manual

Load sharing & speed control with dual dynamics
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Product Manual 82046
(Revision NEW, 1990)
Original Instructions
2301A Load Sharing & Speed Control
with Dual Dynamics
Installation and Operation Manual

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Summary of Contents for Woodward 2301A

  • Page 1 Product Manual 82046 (Revision NEW, 1990) Original Instructions 2301A Load Sharing & Speed Control with Dual Dynamics Installation and Operation Manual...
  • Page 2 Revisions—Changes in this publication since the last revision are indicated by a black line alongside the text. Woodward reserves the right to update any portion of this publication at any time. Information provided by Woodward is believed to be correct and reliable. However, no responsibility is assumed by Woodward unless otherwise expressly undertaken.

  • Page 3: Table Of Contents

    Manual 82046 2301A LSSC with Dual Dynamics Contents ................  ARNINGS AND OTICES ..........  LECTROSTATIC ISCHARGE WARENESS 1. G ............1  HAPTER ENERAL NFORMATION   Description ......................1   Dual Dynamics ....................... 1   System Accommodating Features ................. 2  ...
  • Page 4 Figure 2-3. Plant Wiring Diagram ................. 11   Figure 2-4. Plant Wiring Diagram and Optional Connections ......12   Figure 2-5. Outline Drawing of 2301A Speed Control With Dual Dynamics ..13   Figure 3-1. Diesel Engine Performance Curves ........... 19  ...

  • Page 5: Warnings And Notices

    Start-up On- and off-highway Mobile Applications: Unless Woodward's control functions as the supervisory control, customer should install a system totally independent of the prime mover control system that...

  • Page 6: Electrostatic Discharge Awareness

    Do not touch the components or conductors on a printed circuit board with your hands or with conductive devices. To prevent damage to electronic components caused by improper handling, read and observe the precautions in Woodward manual 82715 , Guide for Handling and Protection of Electronic Controls, Printed Circuit Boards, and Modules.

  • Page 7: Chapter 1. General Information

    Chapter 1. General Information Description The 2301A controls load sharing and speed of generators driven by diesel or gas engines, or steam or gas turbines. These power sources are referred to as "prime movers" throughout this manual. The control is housed in a sheet-metal chassis and consists of a single printed circuit board.

  • Page 8: System Accommodating Features

    Each set of dynamics has its own gain, reset, and actuator compensation adjustments. The selection of dynamics is made by a switch contact. A light emitting diode (LED) on the front of the 2301A control indicates when the alternate set of dynamics is being used by the control.

  • Page 9: References

    2301A LSSC with Dual Dynamics Start Fuel Limit 2301A Dual Fuel Controls include a start fuel limit which allows limiting the fuel setting during start up. The start fuel limit feature may be disabled by a switch at the terminal block. Start Fuel Limit Disable is especially desirable for use with reverse acting controls.

  • Page 10: Chapter 2. Installation

    Figure 2-1. Speed Range Switch Power Requirements High and low voltage models of 2301A Speed Controls are available. Low voltage models require a supply of 20 to 40 Vdc, 15 watts maximum. High Voltage models require a supply of 88 to 132 Vac or 90 to 150 Vdc., 15 watts maximum.

  • Page 11: Location Considerations

    Strip outer insulation from both ends, exposing the braided or spiral wrapped shield. Do not cut the shield on the control end. Cut off the shield on the end away from the 2301A control. Use a sharp, pointed tool to carefully spread the strands of the shield.

  • Page 12: Power Sensing And Load Sharing Connections

    2301A LSSC with Dual Dynamics Manual 82046 Connect lugs to the shield and to the control wires. Number 6 slotted or round crimp-on terminals are used for most installations. Connect the wires to the appropriate terminals on the control. Figure 2-2. Preparation of Shielded Cables Installations with severe electromagnetic interference (EMI) may require shielded wire run in conduit, double shielded wire, or other precautions.

  • Page 13: Power Supply

    Connect the shield to terminal 12. When all controls in the system are of the 2301A type, the shields may be connected continuously between the controls. When load sharing with different controls, do not connect the shields at the point where connections are made to the load-sharing-line bus.

  • Page 14: External Adjustments

    Terminals 23 and 24 must be jumpered if the speed trim potentiometer or digital reference unit is not used. The 2301A control will have a jumper installed in the factory and this must be removed if a speed-trim device is used.

  • Page 15: Speed Sensor

    Manual 82046 2301A LSSC with Dual Dynamics Idle/Rated Ramp Contact Connect a single-pole, single-throw switch between terminal 19 and terminal 16 (terminal 0 on high-voltage controls) as shown on the appropriate plant-wiring diagram. Close the contact for rated speed, open for idle. Oil pressure is often used to close this contact.

  • Page 16: Start Fuel Limit Disable Contact

    2301A LSSC with Dual Dynamics Manual 82046 Start Fuel Limit Disable Contact Connect a single-pole, single-throw switch between terminals 31 and 32, the Close To Disable Start Fuel Limit Terminal (Optional). An auxiliary generator breaker contact should be used if the Start-Fuel Limit Disable function is used.

  • Page 17: Figure 2-3. Plant Wiring Diagram

    Manual 82046 2301A LSSC with Dual Dynamics Figure 2-3. Plant Wiring Diagram Woodward...

  • Page 18: Figure 2-4. Plant Wiring Diagram And Optional Connections

    2301A LSSC with Dual Dynamics Manual 82046 Figure 2-4. Plant Wiring Diagram and Optional Connections Woodward...

  • Page 19: Figure 2-5. Outline Drawing Of 2301A Speed Control With Dual Dynamics

    Manual 82046 2301A LSSC with Dual Dynamics Figure 2-5. Outline Drawing of 2301A Speed Control With Dual Dynamics Woodward...

  • Page 20: Chapter 3. Operation And Adjustment

    2301A LSSC with Dual Dynamics Manual 82046 Chapter 3. Operation and Adjustment Initial Pre-Start Settings Overspeed with resultant equipment damage, personal injury, or death is possible when setting up a control system. Read this entire procedure before starting the prime mover for the first time.

  • Page 21: Start-Up Adjustments

    Manual 82046 2301A LSSC with Dual Dynamics Start-up Adjustments Complete the installation checkout procedure in Chapter 2, and the initial prestart settings above. Close the Close for Rated contact. Set the control for isochronous operation by closing the droop contact.

  • Page 22: Adjust For Stable Operation

    2301A LSSC with Dual Dynamics Manual 82046 Be prepared to make an emergency shutdown when starting the engine, turbine, or other type of prime mover, to protect against runaway or overspeed with possible personal injury, loss of life, or property damage.

  • Page 23: Actuator Compensation Adjustment

    Manual 82046 2301A LSSC with Dual Dynamics Increasing the setting of the GAIN potentiometer provides faster transient response (decreases the magnitude of the speed change from a sudden change in load). To achieve optimum response, slowly increase the GAIN (turn the potentiometer clockwise) until the actuator becomes slightly unstable, then slowly turn the GAIN back counterclockwise as necessary to stabilize the actuator.

  • Page 24: Accel Ramp Time Adjustment

    2301A LSSC with Dual Dynamics Manual 82046 Make certain that the prime-mover speed is controlled by the LOW IDLE SPEED potentiometer in a range above the minimum-fuel position (mechanical stop) of the actuator or prime-mover fuel rack. Low Idle Speed can be set to a minimum of 15 ±3.5% of Rated Speed.

  • Page 25: Figure 3-1. Diesel Engine Performance Curves

    Manual 82046 2301A LSSC with Dual Dynamics Figure 3-1. Diesel Engine Performance Curves Woodward...

  • Page 26: Speed Sensor Check

    2301A LSSC with Dual Dynamics Manual 82046 With the prime mover operating at rated speed and no load, record the voltage across the actuator terminals 20 (+) and 21 (–). Shut down the prime mover and activate the Failed Speed Signal Override by closing the override contact. The voltage to the actuator should now be adjustable by the START FUEL LIMIT potentiometer.

  • Page 27: Phase Correction Procedure

    Manual 82046 2301A LSSC with Dual Dynamics Start the prime mover, apply full load (or the same load as obtained in step 2) and again measure the load signal at terminals 11 and 13. If the load- signal voltage is not 1/3 lower that the reading obtained in step 2, the phasing is not correct.

  • Page 28: Figure 3-2. Temporary Wiring For Transformer Phase Correction

    2301A LSSC with Dual Dynamics Manual 82046 If the temporary burden resistors described above and shown in Figure 3-2 are not used, the prime mover MUST be shut down in addition to removing the load in the following procedure. Measure the load-signal voltage in this procedure by connecting a voltmeter across the Load Signal terminals 11 (–) and 13 (+).
  • Page 29 Manual 82046 2301A LSSC with Dual Dynamics 13. Unload the system, remove phase A CT wires from terminals 6 and 7, and connect them to phase C input terminals 8 x 9.* 14. Apply full load, measure the load signal, and record this voltage.

  • Page 30: Load Gain Adjustment

    It may be necessary to reduce the load-signal voltage of each unit in the system to as low as 3 volts in cases of extremely poor system dynamics. If your system requires a load-signal voltage as low at 3 volts, consult Woodward Governor Company for suggestions for possible remedies.

  • Page 31: Setting Droop And Load Gain, Using An Infinite Bus For Load

    Manual 82046 2301A LSSC with Dual Dynamics Too much droop will cause the engine to overspeed should the load be suddenly lost. Excessive droop will also cause the engine to be sluggish in response to load changes. Too little droop will cause instability, similar to that experienced with improperly adjusted GAIN and RESET.

  • Page 32: Figure 3-4. Droop Base Load With 5% Droop

    2301A LSSC with Dual Dynamics Manual 82046 Mark the potentiometer position and re-adjust the RATED SPEED potentiometer for 60 Hz. Figure 3-4. Droop Base Load with 5% Droop Turn the DROOP and LOAD GAIN potentiometers full cw for maximum droop and load gain.

  • Page 33: Chapter 4. Description Of Operation

    Manual 82046 2301A LSSC with Dual Dynamics Chapter 4. Description of Operation Introduction The 2301A Load Sharing and Speed Control monitors and controls: Speed: The speed control section keeps the prime mover at the correct speed, and Load During parallel operation of two or more generators the load-...

  • Page 34: Speed Control

    2301A internal circuits. A speed reference to which the prime mover speed is compared. (Idle and Rated speed references are provided by the 2301A. The speed reference being used is selected by the operator with an external switch.) A speed summer/amplifier with an output proportional to the amount of fuel or steam required to maintain the reference speed at any given load.

  • Page 35: Figure 4-3. Speed Control Adjustments

    Manual 82046 2301A LSSC with Dual Dynamics Failed Speed Signal Circuit A failed-speed-signal circuit monitors the speed-signal input. When no signal is detected, it calls for minimum fuel. The minimum-fuel signal is sufficient to cause the actuator to go to the minimum position. Incorrect linkage adjustments or other restrictions in the external system may prevent shutdown.

  • Page 36: Terminals For External Devices

    (see Figure 4-4). The speed setting of this mechanical governor is slightly higher than the speed setting of the 2301A. Should the electronics fail, the actuator will try to go to maximum fuel but will be stopped...

  • Page 37: Paralleling

    Manual 82046 2301A LSSC with Dual Dynamics Figure 4-4. Reverse Acting System Paralleling Two basic methods are used for paralleling: droop, where speed reference decreases with load, and isochronous, where speed reference remains constant. The paralleling system shown in Figure 4-5 consists of: ...

  • Page 38: Figure 4-6. Terminal Connections

    2301A LSSC with Dual Dynamics Manual 82046 Figure 4-6. Terminal Connections An auxiliary contact on the generator tie-breaker connected from terminal 16 (terminal 0 on high voltage systems) to terminal 14 is used to select isochronous load-sharing operation. A contact in series with the auxiliary contact may be used to select either the droop or isochronous mode of operation (see Figure 4-6).

  • Page 39: Power Supply

    Figure 4-7. Power Supply The 2301A Load Sharing and Speed Control is powered by an isolated switching power supply, which allows operation over a wide voltage range without generating excessive heat. This isolation protects the system from interference caused by ground loops, particularly through the load-sharing line, and allows load sharing with earlier models of Woodward load-sharing controls.

  • Page 40: Chapter 5. Troubleshooting

    Both high-voltage and low- voltage models of 2301A controls are available. The low-voltage model will be damaged if connected to a high-voltage supply. The high-voltage model will not operate with a low-voltage supply.
  • Page 41 2301A Speed Control. If the control does not cut back the actuator voltage when the speed setting is completely ccw the 2301A control may be faulty, or may have the wrong speed range. If the voltage is cut back, (increased on reverse acting controls) look for a problem in the linkage or actuator.
  • Page 42 An improper cold engine), or the LOW IDLE SPEED setting should be raised. setting may interfere with the If this does not correct the problem, the 2301A control may Low Idle Speed Setting when the be faulty. prime mover is hot.

  • Page 43: Chapter 6. Product Support And Service Options

    A current list of Woodward Business Partners is available at www.woodward.com/directory. Product Service Options Depending on the type of product, the following options for servicing Woodward products may be available through your local Full-Service Distributor or the OEM or Packager of the equipment system.

  • Page 44: Returning Equipment For Repair

    To prevent damage to electronic components caused by improper handling, read and observe the precautions in Woodward manual 82715, Guide for Handling and Protection of Electronic Controls, Printed Circuit Boards, and Modules.

  • Page 45: Engineering Services

    Field Service engineering on-site support is available, depending on the product and location, from one of our Full-Service Distributors. The field engineers are experienced both on Woodward products as well as on much of the non- Woodward equipment with which our products interface.

  • Page 46: Technical Assistance

    Manual 82046 Technical Assistance If you need to contact technical assistance, you will need to provide the following information. Please write it down here before contacting the Engine OEM, the Packager, a Woodward Business Partner, or the Woodward factory: General...
  • Page 47 Email and Website—www.woodward.com Woodward has company-owned plants, subsidiaries, and branches, as well as authorized distributors and other authorized service and sales facilities throughout the world. Complete address / phone / fax / email information for all locations is available on our website.

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