Refer to the Control Systems Toolbox .ecb file Simulator Scaling for representa- tions of the system models and simulator scaling.
Refer to Figure 6-1, Block 9.
All procedures in this section were completed successfully for:
¨ Master 1 ¨ Master 2
Operation of some relays may occur in Simulator Mode. Verify that flashing power and ac power to the bridge is removed or isolated from the generator field and personnel are clear from any moving devices.
The EX2100 contains a built-in simulator that models a generator and static excitation system. When simulator mode is selected, the feedbacks presented to the control regulators are switched, by software, from the real feedback inputs to feedbacks derived by mathematical models mimicking the generator and field circuit behavior.
The EX2100 controls then react in a manner close to the way they would react in normal operation. The simulator can serve as a valuable startup, maintenance, and training tool. While the simulator mode in the EX2100 is a very close approximation of the actual operating look and feel of the exciter, there will be some instability on the operator displays and EGD page information due to the coordination of data among the three controllers. Changes to regulator gains should not be made from observations made in simulator mode.
The simulator is scaled to represent the actual system as accurately as possible. This means that when a start command is given to the EX2100, it follows a normal start sequence. Unlike the EX2000, the EX2100 will not generate actual commands to close field breakers and flashing contactors. Operation of these devices will be tested in the Temporary Load section that follows.
The generator armature and field models, as well as the exciter stator and field models, provide the feedbacks for exciter field voltage and current, and generator stator voltage and current. These feedbacks are handled by the transducering algorithms the same way real feedbacks are used to calculate watts, vars, speed deviation, and frequency. If the model scaling is correct, the display data cannot be distinguished from real data. Main generator field voltages and currents are also simulated internally and used for correct model operation.
The exciter regulator can be raised and lowered in automatic or manual regulator, both online and offline. The regulator limits activate at the same levels as in non- simulated operation. The regulator responses provide a good representation of what can be expected of the real system in response to step changes.
By changing the parameter containing the value representing model shaft torque it is possible to raise or lower the simulated generator real power output when simulating online operation. The exciter changes the system vars in response to changes in the exciter voltage setpoints.
Block diagrams are accessible by selecting the EX2100 Over- view diagram and clicking on the appropriate page button.
In the following procedures, various block diagrams are referenced to allow access to parameters and variables for testing. These diagrams can be found in the .ecb file. The finder function in the toolbox can also be used to locate pa- rameters and variables.
EX2100 Overview
Innovation Control
Device name: Date:
01 02 03 04 05 06 07 08 09 10 11 12 13 14 15
16 Industrial SystemsGE Motors and
Salem, Va. USA
PRODUCT: 01 02 03 04 05 06 07 08 09 10 11 12 13 14 15 A B C D E F G H I J K L M N O P Q R S T U
A B C D E F G H I J K L saved date: December 12, 2000 ????
Page name:
#### $ StatorSim
Simulator: Stator and Saturation Curve
$ Diag_Util
D/A's and General Purpose Filters
$ Capture
Capture Buffer Configuration
$ FlashStart
Start Stop Sequencing: Flashed Start
$ AuxBusStart
Aux. Bus Start
$ FiringControl
SCR Firing Control
$ FieldSim
Field Side
$ Keys_States
Auto/Manual, PT Failure, Run Requests Simulator Enable, VAR/PF & PSS Enables
$ AlarmString
Alarm and Diagnostic Strings
$ TripString
Trip String with enables
$ Alarms
Alarms: Individual functions
$ Trips
Trips: Individual functions
DSPX Side
$ GP_In_Out
General Purpose Inputs/Outputs (and 52,86)
$ EMIO_DiagFbk
EMIO Outputs with Diagnostic Feedbacks
$ VCO
Analog Feedbacks Field Signals, Test A/D's, and Bridge Temperatures
Dual Port Memory (DPM)
$ Dpm1
DPM Signal Map (pages 1 & 2)
$ DpmBits1
DPM Boolean Signals (bits 0-15)
$ DpmBits2
DPM Boolean Signals (bits 16-31)
$ Dpm2
DPM Signal Map (page 3)
$ EGPA1Logic
Gate Pule Amplifier Logic: Bridge 1
XY Charts $C.Synchro $C.LOE $C.OEL $C.VHz $C.Satcurve
$ EGPA2Logic
Bridge 2
$ InnerLoop
Inner Loops: Field voltage and current regulators
$ Transfer
C3 Logic: Transfer State Machine
$ ProtectXfer
Out of Bounds protective transfers
$ GenInstr
Generator Stator Side Instruments
$ PTCT_Wiring
PT and CT Wiring
$ Problems
Problems: Master Asks for a Transfer
$ BodeIL
Inner Loop Bode Analysis
$ CondSense
Conduction Sensing (Sensor Failure)
$ FGD_In
Field Ground Detector: Input Filtering
$ FGD_Seq
Sequencing
$ FGD_Calc
Fault Calc / Freq Component
$ BridgeTherm
Bridge Thermal Alarms and Trips
$ KeyPad
KeyPad
Outer Loop Functions
$ AVR $ AutoRef $ EXASP $ MANREF
$ PSS $ VARPF
$ HTSEN $ UELHTC $ UELREG $ GenRatings
Generator Ratings
$ VCO_Zero
Analog Feedbacks Offset Removal
GEH-6631 EX2100 Installation and Startup Chapter 6 Initial Startup and Commissioning · 6-23
The Exciter Control Window animated bar graph display is available using the icon in the .ecb file of the toolbox.
The EX2100 can be controlled from the toolbox by using the animated bar graph display instead of the door-mounted keypads. The keypads can then be used to monitor variables and I/O states while testing.
Bar Graphs and meters provide feedback of the current state of the device.
Click + to increase or - to decrease the voltage.
Click On to put the exciter in the run mode.
Use Off to take the exciter out of run mode.
Click to reset faults.
Auto controls terminal voltage on the generator.
Man controls voltage on the field.
1. Place the EX2100 controls in simulator mode from the Controls Systems Tool- box or local keypad (EDI) by changing (SimMode) to a true state. Once in simulator mode, the exciter simulated speed should begin to increase. This can be monitored via <Spd_Ref>. Set simulated speed to 100% via (SimSpeedRef).
Note The following procedures do NOT purport to cover all settings of the pa-
rameters in the EX2100. These checks are an assurance that the basic control fea- tures of the EX2100 are in place and will control the generator safely prior to operation with actual field voltage and current.
2. Temporarily jumper the contact input on the ECTB board TB2-47and 48 to simulate 86G lockout relay reset condition. Verify that <Aux86> is in a true state. (Keypad menu: GP_In_Out). Removal of the jumper should toggle the variable to a False state. Replace the jumper so that <Aux86> is true.
3. Verify the Master 1 and Master 2 controls are in automatic regulator mode by selecting Auto on the operator keypad (Figure 6-5). <ASP_AA> will be true. 4. Start the excitation in simulator mode by selecting the (1) on the operator
keypad. Simulated terminal voltage, field voltage, and field current should build to rated no-load values.
An upper case M1 or M2 in the keypad display indicates the active master. Lower case m1 or m2 indicates backup.
Only the active master can effect changes to the EX2100. Control must be transferred to the backup master through the keypad menu before the backup master keypad will raise/lower, toggle from auto to manual, or start/stop the exciter.