9907-162 WOODWARD 505E Digital Governor for Extraction Steam Turbines
9907-162 WOODWARD 505E Digital Governor for Extraction Steam Turbines
9907-162 Technical Specifications
Dimensions 365.6 mm X 59.2 mm X 214.1 mm
Droop 0 – 12% speed reduction.
Humidity Tested at 95%, not condensing
Load Sharing Input 0-3 Vdc
Manufacturer Woodward
Power Supply 18-36 Vdc
Sync Input Compatible with Woodward SPM-A synchronizer
505E Software Changes Covered in this Manual Revision
1.9907-162 PROGRAM MODE: Made all start modes default to false to ensure a customer programmed the unit. Also added an error check to ensure Rated Speed (when programmed as a gen set) was less than max gov.
2. SERVICE MODE: Changed the hold changes for Min Load to come from the Breaker Logic header’s Hold Changes input. Previously the hold changes
command was selected under the Speed Control Settings header.
3. SPEED SETPOINT RATES: Changed the minimum adjustment range for all speed setpoint rates to 0.01 (was 0.1).
4. AUX LIMITER or CONTROLLER: Added logic to ensure the inhibited status of Aux control when the input is failed. In addition, changed Aux re-enable logic such that when a failed aux input is restored there is no glitch to the speed LSS. Also changed breaker open logic to correct a Gen Opening Aux actuator output glitch.
5. 9907-162 AUX CONTROLLER: Changed the speed setpoint aux biasing logic to only allow the speed control limiting action (while in aux control) to be active when the speed setpoint reaches max gov. Prior to this fix the speed limiter could come into control during an extreme transient.
6. AUX DIRECT ENTERED SETPT: Changed Aux Entered setpoint to be reset/ stopped on a shutdown pulse rather than held disabled on a shutdown condition. This change allows the Aux Limiter function direct setpoint entry even when the unit is tripped.
7. AUX, CASC, and EXTR DROOP: Changed the droop feedback lag-tau tunable range from a max of 10 to a max of 1000.
8. DECOUPLED CASCADE CONTROL: Added a lag to the speed the speed setpoint is using during a utility tie breaker open setback. Also updated the logic used to reset the speed setpoint to minimize to bump experienced when Decoupled Casc is disabled. Changed logic to fix a problem where breaker opening while in the Cascade decoupled mode would cause the HP valve to close then open unexpectedly.
9. MODBUS: Changed the Gen and Tie Open alarms for Aux, Casc, and Remote to match the Modbus®
* listing—the software eventlatch inputs were reversed/backwards with the Modbus listing.
*—Modbus is a trademark of Modicon, Inc.
10. CONTROLLED STOP: Made the Controlled Stop abort if speed raise/lower is selected or another control mode is selected. This can be tuned-out by setting CNTRL_STOP.RL_STOP. IN_2=*false in the debug mode.
11. ANALOG INPUTS: Changed max setting on the delay time’s tunable range from 3 ms to 3000 ms. The analog input failure delay setting is defaulted to
zero but can be adjusted up to 3000msec using the debug mode MAIN.AIx.LATCH_DLY where x is the analog input number. Added a tunable single pole filter (LAG) to each analog input. Output/input = 1/(1+st) where t
= 1/(2(pi)f) = LAG_TAU. The Lag-tau is defaulted to zero but can be adjusted
in the debug mode using MAIN.AIx_LAG.LAG_TAU where x is the analog
input number (1-6).
General Description
General
The 505E is a 32-bit microprocessor-based control designed to control single extraction, extraction/admission, or admission steam turbines. The 505E is field
programmable which allows a single design to be used in many different control applications and reduces both cost and delivery time. It uses menu driven software to instruct site engineers on programming the control to a specific generator or mechanical drive application. The 505E can be configured to operate as a stand-alone unit or in conjunction with a plant’s Distributed Control
System.
Operator Control Panel
The 505E is a field configurable steam turbine control and operator control panel (OCP) integrated into one package. A comprehensive operator control panel, including a two- line (24 characters each) display, and a set of 30 keys is located on the 505E’s front panel. This OCP is used to configure the 505E, make OnLine program adjustments, and operate the turbine/system. Easy to follow instructions are presented in English through the OCP’s two-line display and operators can view actual and setpoint values from the same screen.
Turbine Control Parameters
The 505E interfaces with two control valves (HP & LP) to control two parameters and limit an additional parameter, if desired. These two controlled parameters are typically speed (or load) and extraction/admission pressure (or flow), however, the 505E could be utilized to control or limit: turbine inlet pressure or flow, exhaust (back) pressure or flow, first stage pressure, generator power output, plant import and/or export levels, compressor inlet or discharge pressure or flow, unit/plant frequency, process temperature, or any other turbine related process parameter. Refer to Volume 2 for details on applications.
Communications
The 505E can communicate directly with plant Distributed Control Systems and/or CRT based operator control panels, through two Modbus® communication ports. These ports support RS-232, RS-422, or RS-485 communications using ASCII or RTU MODBUS transmission protocols.
Communications between the 505E and a plant DCS can also be performed through hardwired connections. Since all 505E PID setpoints can be controlled through analog input signals, interface resolution and control is not sacrificed.
Other relevant models:
WOODWARD TG-13（8516-038）
WOODWARD EGCP-3 8406-113
WOODWARD EASYGEN-3500-5/P2 8440-2145
WOODWARD 9907-838
WOODWARD 9907-252
WOODWARD 9907-167
WOODWARD 9907-165
WOODWARD 9907-164
WOODWARD 9907-162
WOODWARD 9907-149
WOODWARD 9907-147
WOODWARD 9905-973
WOODWARD 8701-758 5601-1126
WOODWARD 8446-1019
WOODWARD 5501-471
WOODWARD 5501-470
WOODWARD 5501-467
WOODWARD 5466-409
WOODWARD 5466-316
WOODWARD 5466-258
WOODWARD 5464-414
WOODWARD 2301E 8273-1011
WOODWARD 8200-1302
WOODWARD 9907-1290
WOODWARD 8200-1302
WOODWARD 8440-1713
WOODWARD 8440-1849 D
WOODWARD 8440-2165 SPM-D2-11
WOODWARD 8444-1019F
WOODWARD 8521-0312 UG-10D
WOODWARD EGCP-2 8406-121
WOODWARD 9907-175IMG
WOODWARD 9905-001 SPM-A
WOODWARD 9905-020
WOODWARD 9905-144
WOODWARD 9905-726
WOODWARD 9662-810
WOODWARD 9671-810
WOODWARD 9561-810
WOODWARD 9563-810
WOODWARD 8237-1246
WOODWARD 8273-126
WOODWARD 8290-191
WOODWARD 8200-226
WOODWARD 5466-348
WOODWARD 8440-2165
