Description

The WOODWARD 9907-164​is a critical digital control module for the Woodward 2301A Load Sharing and Speed Control system,a foundational platform for governing prime movers like diesel and gas engines.This module serves as the intelligent core of the governor system,precisely regulating engine speed and managing load sharing between multiple generator sets in parallel operation.It is a staple in the power generation and industrial engine markets,renowned for its reliability and precise control.

Application Scenarios

Within a hospital’s critical power infrastructure,multiple diesel generator sets stand ready to automatically start and synchronize within seconds of a utility failure.The control challenge is immense:each massive engine must not only start and reach the correct speed(60Hz or 50Hz)but must also instantly accept a proportional share of the total electrical load without causing frequency or voltage swings that could damage sensitive medical equipment.The WOODWARD 9907-164​module within each generator’s 2301A control panel is the component that makes this seamless transition possible.It continuously monitors engine speed via a magnetic pickup,compares it to the precise isochronous setpoint,and calculates the exact fuel rack or actuator position needed.More importantly,when generators are paralleled,the 9907-164​modules communicate via a load-sharing bus,actively adjusting their outputs to ensure each unit carries its fair share of the total load.This prevents one generator from being overloaded while another is underloaded,ensuring stable,reliable power for life-saving equipment during an outage.

Parameter

Main Parameters

Value/Description

Product Model​

9907-164​

Manufacturer​

Woodward Governor Company

Product Category​

Digital Governor Control Module/Load Sharing Controller

Compatible System​

Woodward 2301A Load Sharing and Speed Control

Input Power​

Typically 18-40 VDC(powers internal circuitry)

Speed Sensing​

Magnetic Pickup(MPU)input;accepts signal from engine flywheel

Control Output​

Drives a Proportional Actuator(e.g.,EG,EG3P,1509 series)

Load Sharing​

Isochronous(single unit)&Droop(parallel)operation;supports load share bus(LSB)

Communications​

4-20mA analog interface for remote speed/load control;dedicated LSB wiring

Key Features​

Digital PID control,adjustable gain/stability,fault diagnostics,rugged industrial design

Primary Function​

Provides precise isochronous speed control for single gensets and proportional load sharing for multiple parallel units.

Typical Application​

Governing diesel and gas engine-driven generator sets,pumps,and compressors.

Technical Principles and Innovative Values

The WOODWARD 9907-164​represents a significant evolution in governor technology,transitioning from analog to digital control while maintaining a simple,robust interface.

Innovation Point 1:Digital PID Control with Advanced Tuning:​At its core,the 9907-164​implements a sophisticated digital Proportional-Integral-Derivative(PID)control algorithm.Unlike older analog boards,its digital nature provides exceptional stability and repeatability.The module allows for fine-tuning of gain,stability,and compensation parameters via potentiometers or software(depending on the specific 2301A variant),enabling precise matching of the control response to the dynamic characteristics of any engine,from a high-speed unit to a slow-speed diesel.This customization minimizes hunting and overshoot,leading to faster settling times and better frequency stability.

Innovation Point 2:Isochronous Load Sharing via Current Differential:​The module’s most critical innovation for parallel operation is its load-sharing methodology.Each 9907-164​in a multi-gen set installation is connected to a common Load Share Bus(LSB).This bus carries a voltage signal proportional to the total load.Each controller compares its own generator’s power output to this bus signal.If a unit is underloaded relative to the bus,its 9907-164​increases the speed reference slightly,causing the actuator to add fuel and pick up more load.This”current differential”method is simple,wire-based,and highly reliable,ensuring perfectly proportional load division without the need for complex digital communication networks that could fail.

Innovation Point 3:Robust Integration and Diagnostic Feedback:​The 9907-164​is designed for seamless integration into the proven 2301A system.It provides critical feedback signals,such as a 4-20mA output proportional to engine speed or load,for remote monitoring by a PLC or SCADA system.It also includes diagnostic capabilities;by monitoring the MPU signal and internal references,it can detect faults like loss of speed signal or internal errors,providing early warning of potential issues before they lead to a generator failure.

Application Cases and Industry Value

Case Study:Enhancing Grid Stability for a Remote Microgrid

A mining operation with its own isolated power station used four 2MW diesel generators running in parallel.The legacy analog governors caused frequent load swings,leading to frequency excursions that tripped sensitive processing plant equipment,resulting in hours of lost production.The site upgraded all four generator controls with new Woodward 2301A systems featuring the WOODWARD 9907-164​digital control modules.

Process&Improvement:​After installation,engineers used the digital tuning capabilities of the 9907-164​modules to carefully match the governor response of each engine,accounting for slight differences in fuel system performance.The load-sharing bus was properly calibrated.The result was a dramatic improvement in grid stability.Upon sudden application or shedding of large loads(like a large conveyor motor),the generators now responded in unison,maintaining frequency within a tight 0.25 Hz band compared to the previous 1.5 Hz swings.This stability eliminated the nuisance trips.The chief electrician reported,”The new 9907-164​controls transformed our power plant.The load sharing is so precise we can’t tell which unit is carrying more weight.We’ve had zero process trips due to frequency issues for over 18 months,saving us an estimated$500,000 in lost production time.”

Related Product Combination Solutions

The WOODWARD 9907-164​module is the computational brain but requires a complete system to function.Its operation is interdependent with these key components:

Woodward 2301A Chassis/Enclosure:​The main housing that contains the 9907-164​module,terminal blocks,and auxiliary boards.Models like the 8236-xxx​enclosure provide the physical platform.

Woodward Actuator(e.g.,EG-3P,1509-051):​The mechanical output device.The 9907-164​sends a controlled current signal to this actuator,which converts it into a precise mechanical movement to adjust the engine’s fuel rack or throttle.

Magnetic Pickup Sensor(MPU):​The primary speed feedback device.A sensor like the WR-3251​is mounted near the engine flywheel gear.It generates an AC frequency signal proportional to engine speed,which is fed directly into the 9907-164​as its primary process variable.

Woodward 8440-1050 Load Share Board:​A dedicated module used in multi-engine applications.It often works in conjunction with the 9907-164​to manage the load-sharing bus(LSB)wiring and signal conditioning between paralleled units.

Woodward 8212-xxx Power Supply:​Provides clean,regulated DC power(e.g.,24VDC)to the 9907-164​module and other components within the 2301A cabinet from the generator’s battery system.

ProTech 203 Overspeed Protection Module:​A critical safety device.While the 9907-164​controls normal speed,a dedicated overspeed protector like this provides a hardwired,independent shutdown circuit for ultimate engine protection.

Woodward 2301D or EasyGen Controller:​More modern digital governors or generator control units.The 9907-164​is a classic,reliable solution,while these represent newer digital platforms that may be considered for upgrades or new installations.

Installation,Maintenance,and Full-Cycle Support

Installation of the WOODWARD 9907-164​module is part of integrating a complete 2301A control system.It involves mounting the 2301A cabinet,connecting the MPU wiring,running thick actuator control cables,and establishing the load-sharing bus connections for parallel systems.Critical steps include properly shielding the MPU cable from electrical noise and calibrating the actuator stroke.The module itself plugs into a dedicated slot within the chassis.Initial configuration involves setting the DIP switches for the correct MPU teeth and adjusting the gain,stability,and speed potentiometers according to the engine manufacturer’s specifications—a process that often requires a trained technician.

Routine maintenance is minimal but crucial.It involves checking and cleaning electrical connections,verifying the MPU air gap,and observing system performance during load acceptance and rejection tests.The most common maintenance task for the 9907-164​module is replacement due to aging components or an internal fault indicated by a loss of control.Due to the critical nature of generator control,having a tested spare on hand is a best practice for mission-critical facilities.

We provide comprehensive support for the WOODWARD 9907-164.Every module we supply is sourced from reliable channels and can be functionally tested to verify basic operation.We understand the critical role this component plays in power generation continuity.Our technical team can assist with compatibility verification for your specific 2301A chassis and actuator setup.We are committed to providing the reliable parts and support needed to keep your standby or prime power systems ready for action.Contact us for a customized solution for your Woodward governor control needs.

选择深圳长欣，选择放心，售后无忧 大量现货，当天顺丰发货！！！