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Getting ATP:
ECE 404/504
Lecture 5
 Available in ECE dept labs on campus
 Request a license through
http://www.emtp.org
» Once you have confirmation they will send
you instructions for downloading from a
secure server
» Or, once verified, I can give you access to a
zip file with relevant files
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Installing ATP:
Spring 2013
ECE 404/504
Lecture 5
 Minimum to Download
» Mingw version of ATP
» ATPDraw -- latest version or latest patch
– Presently Atpdraw57.zip
» PlotXY
 Option: ATP Easy Installer
» Download from secure sites in Japan
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ECE 404/504
Lecture 5
Installing ATPDraw
 Installation is fairly easy
 Default installation path “Program Files” 
avoid this
 The space in the file name can create
problems running ATP from ATPDraw
» Install it somewhere else.
else I normally install in
“C:\tools\prog\ATPDraw”
 Install program may create shortcut in the
start menu, but not very cleanly
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Running ATP from
ATPDraw
Spring 2013
ECE 404/504
Lecture 5
 Still need a copy of ATP
 Licensed users can get other versions
 Follow installation directions for yours
 ATPDraw calls ATP from a DOS Batch
file (extension *.bat)
» For example, I call it “RUNATP.BAT”
 Passes full path to file when calls ATP
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Sample Batch File
ECE 404/504
Lecture 5
 The following batch file is for Ming32 ATP
SET GNUDIR=C:\tools\prog\atp\
SET PATH=C:\tools\prog\atp;"%PATH%”
tpbig both %1 s -r
The first line defines variable GNUDIR
» Different ATP versions use different name
» Sets program working environment
» The final “\” is important
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Spring 2013
ECE 404/504
Lecture 5
 Second line adds executable to your search
path
th (not
( t needed
d d if sett this
thi att boot
b t time)
ti )
 The next line calls ATP itself
» tpbig both %1 s -R
– “both” tells program to write error messages to screen
and to file (useful for debugging)
– Could also set “disk” to only do disk file or leave blank
for no message
– First “%1” is input data file from ATPDraw
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I Sample Batch File (cont.)
ECE 404/504
Lecture 5
– The “s” is to create appropriate output file.
– “-R”
R tells ATP overwrite existing output file if one
exists
 This bat file will let you run ATP, and all of
the support program (line constants etc)
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Editing “startup”
ECE 404/504
Lecture 5
 ATP reads a file called “startup”
startup
» Resides in same directory as tpbig
» Sets variables for the program
 A few suggested changes from default
» Change
g PL4 file format to work with PlotXY
– NOBLAN set to 0
– NEWPL4 set to 2
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{ignore blank lines}
{won’t work with Analyzer}
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Setting Up ATPDraw
ECE 404/504
Lecture 5
 Open up ATPDraw
 Select: “Tools” pull down menu
 Select: “Options...”
 Choose “Preferences” tab
» You select a text editor, or use Notepad (default)
» “ATP” is where you set path to your batch file
 Armafit: which we won’t cover in this course
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ATPDraw “Preferences”
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Spring 2013
ECE 404/504
Lecture 5
Spring 2013
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Further Settings
ECE 404/504
Lecture 5
 The “Files&Folders” tab settings are ok
 However,
However you do want changes in the
View/ATP tab
» Select “Edit settings” tab
» You may want to change
some of the default
settings. However, you
can change any of these
for a specific data file
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Simulation Settings
Spring 2013
ECE 404/504
Lecture 5
 Default time step (deltaT)
is very small
 Default run time short
 Xopt and Copt ok
 Select “Power Frequency”
» Reset to 60 Hz from 50Hz
» Can mess up some sources
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Output Settings
ECE 404/504
Lecture 5
 Probably don’t need the
selected “Printout”
options for most cases
 Slow down the program
somewhat
 Plot frequency should be
low and odd.
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Other Settings
Spring 2013
ECE 404/504
Lecture 5
 Switch/UM settings ok for most cases (are
for statistical studies only)
 Load flow controls controls how the load
flow initialization is run
 Variables: Use can define parameters
here and pass them different components
» Or control them with Pocket Calculator option
» See help file for more info
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ECE 404/504
Lecture 5
Saving New Settings
 The “Save”
Save or “Apply”
Apply buttons aren
aren’tt
sufficient to permanently save change
 Also choose: Tools --> Save Options
 These are all saved into a file called
ATPDraw.ini
» Typically
T i ll saved
d iin user’s
’ settings
tti
» Could put copy in the directory with
ATPDraw.exe
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Other Settings
Spring 2013
ECE 404/504
Lecture 5
 To set other plotting programs or other post
processing options you need to open a file
» Either select the “File|Open” sequence of click on
the icon
» Initial default is the Examples directory, after that
it is the last directory worked in.
» For now, choose example “Exa_1.adp” (*.adp
represents the drawing files).
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Example 1
ECE 404/504
Lecture 5
 Try to run
example
p case
to make sure
program
installed and
set up
correctly
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ATP Menu
Spring 2013
ECE 404/504
Lecture 5
 A new pulldown menu is now available at
th ttop off the
the
th window,
i d
called
ll d “ATP”
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ATP Menu
ECE 404/504
Lecture 5
 Settings is changes deltaT
etc. for a given case
 “Make File As” generates
ATP data file from drawing
 Run ATP calls your bat file
 Each
E h “Edit” calls
ll ttextt editor
dit
 Make Names, makes node
names for drawing
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Edit Commands
Spring 2013
ECE 404/504
Lecture 5
 Allows you to set
additional commands
 Run other ATP versions
» On Current ATP drawing
» On Selected File
 Run
R plot
l t programs
» On Current PL4
 Use “Update” to set
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Saving New Settings
ECE 404/504
Lecture 5
 The “Update”
Update buttons isn
isn’tt sufficient to
save for next time
 All choose: Tools --> Save Options
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Running an ATP File
Spring 2013
ECE 404/504
Lecture 5
 Now we run the example case opened earlier
 Always a multi-step process
» 1) Make file to create ATP data file from drawing.
– Must do this every time you change drawing
– Default is to place this in “ATP” subdirectory under
ATPDraw home directory (with extension *.ATP)
– Can edit this file with “Edit ATP-File” option (not saved
to drawing file)
» 2) Run your case
» 3) Call plotting program
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Running an ATP File
ECE 404/504
Lecture 5
 The drawing file saved separately (save often)
 Remember to save your changes often
 Default is to save this in the “Project”
subdirectory under ATPDraw
 Note that if want to save elsewhere, need to
select a new home for both ADP and ATP files
» PL4 and *.lis (or *.out depending on version) are
written to same directory at *.ATP file
» Need to cleanup directories periodically
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Making You Own File
Spring 2013
ECE 404/504
Lecture 5
 Open a new drawing (from File
menu or from icon)
 Can get the component menu by
right clicking mouse in the
drawing screen
 Each item lets you select
components to create
 More later….
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Associated Files
ECE 404/504
Lecture 5
 Input Datafile (text file)
» Extension options: *.atp
» Avoid names with spaces
 Plot Datafile (formatted ASCII)
» Extension *.PL4
 Text
T t Output
O t t File
Fil (plain
( l i text)
t t)
» Extension: *.LIS
» Error Messages in this file
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Associated Files (cont)
Spring 2013
ECE 404/504
Lecture 5
 ATPDraw Schematic File
» Extension: *.acp (or *.adp for older versions)
 Supplement Include File
» Use modular programs
» Examples: Line constants output, subsystems
» Extension
E t
i options:
ti
**.pch,
h **.lib
lib
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Making You Own File
ECE 404/504
Lecture 5
 Set deltaT and Tmax!!!
 Open a new drawing (from File
menu or from icon)
 Can get the component menu by
right clicking mouse in the
drawing screen
 Each item lets you select
components to create
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Linear Branches
Spring 2013
ECE 404/504
Lecture 5
 These are the basic circuit
elements
 Single phase and three phase
options
 C:U(0) and L:I(0) are capacitor
and inductor with voltage/current
initial conditions
 Note ATPDraw uses U for voltage
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ECE 404/504
Lecture 5
 Once you select a component you can rotate
it by single clicking the right mouse button on
it.
» Use to structure your drawing more nicely
» This also selects polarity for branch outputs
 Double-click
Double click left button to open a window to
edit values
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Resistor Dialog Box
Spring 2013
ECE 404/504
Lecture 5
 Set value for resistance




in Ohms
Node names not set
Can add comment
$Vintage,1 sets high
precision numbers
Edit definitions: allows
redefine modeladvanced feature
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Resistor Dialog Box
ECE 404/504
Lecture 5
 Set branch output:
 Comments
» For file
» For drawing
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Inductor
Spring 2013
ECE 404/504
Lecture 5
 L is in mH unless you



have set Xopt to a
frequency
Label creates a label on
the drawing next to the
component
Help menus are pretty
good
Kp numerical oscillation
damping constant
» Adds parallel resistor
» More on that later
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Capacitor
ECE 404/504
Lecture 5
 Capacitance is in


microFarads unless
Copt set
Note program sets a
default value to prevent
errors if you randomly
connect nodes
Ks numerical oscillation
damping constant
» Adds series resistor
» More on that later
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RLC
Spring 2013
ECE 404/504
Lecture 5
 RLC lets you set
R, L, and C or
any combination
 Creates same
data card as R,
L or C alone
L,
alone, but
lets you do all
fields
 Series RLC
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3 Phase RLC
ECE 404/504
Lecture 5
 Can choose a
series 3 phase
RLC
 Options include
Y connected
 and Delta
connected
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Capacitor with Initial
Voltage Value
Spring 2013
ECE 404/504
Lecture 5
 Still set value


for C
Also set positive
and negative
voltage relative
to ground at
T=0
Will be useful
for homework
#1
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Inductor with Initial
Current Value
ECE 404/504
Lecture 5
 Still set value
for L
 Plus the
current at T=0
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Switch Pop Up Menu
Spring 2013
ECE 404/504
Lecture 5
 In most cases you will use a time
controlled switch (single or three
phase)
 Measuring Switches (always
closed)
 TACS controlled switches
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I Time Controlled Switch
 Set T_close
 Set T_open
ECE 404/504
Lecture 5
I
» T_open must be
larger than T_close
 Imar is absolute

value of current it
will interrupt
Can select outputs
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I Time Controlled Switch
Spring 2013
ECE 404/504
Lecture 5
 Can also set a

time sequence ffor
ti
repeated
open/close
operations.
Up to 16
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ECE 404/504
Lecture 5
Three Phase Switch
 Individual

timing
ti
i ffor
each phase
No reclose
characteristic
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Source Pop Up Menu
 Allows you to create ordinary
ECE 404/504
Lecture 5
ATPDraw 5.6+
sources
 Machines and TACS controlled
sources on other pop-up
menus
 Most of these sources are
referenced to ground
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Version 5.6+ AC source
(1&3 phase)
1 ph voltage
source
3 ph current
source
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Type 11 Source
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ECE 404/504
Lecture 5
Spring 2013
ECE 404/504
Lecture 5
Spring 2013
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What is Needed in
Transformer Models?
ECE 404/504
Lecture 5
 Fault studies require more information
» Connection info
– wye
– delta
– zig-zag
– autotransformer
– etc.
» Grounding
» Possible impact of tertiary
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Spring 2013
Low Frequency
Transients
ECE 404/504
Lecture 5
 Similar modeling info to fault programs
» Connection information more important
 Magnetizing branch
» Saturation
 Core loss term
 Not using per unit
» Need to include turns ratio
» Divide leakage L, winding R between windings
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Single Phase
Equivalent Circuit
ECE 404/504
Lecture 5
 Winding resistance
 Leakage inductance
 Core loss--total losses
 Non-linear inductor model for magnetizing
branch
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ATP Options
Spring 2013
ECE 404/504
Lecture 5
 Ideal transformer component
 Saturable transformer component
 BCTran -- preprocessor that converts
description of transformer to coupled RL
 Can also create manually using coupled RL
branches
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Avoid ATP Ideal
Transformer
ECE 404/504
Lecture 5
 Limited to two winding transformers
 It is very easy to create numerical
problems in the simulation with the ideal
transformer
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Saturable Transformer
Spring 2013
ECE 404/504
Lecture 5
 Model has built-in circuit elements
» Winding resistance
» Leakage inductance (can’t enter 0)
» Core loss resistance
» Magnetizing branch
– nott entered
t d as an L in
i mH
H
» Can set all except leakage to 0 to simplify
» Enter winding to winding ratios
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Single Phase Saturable
Base Attributes
ECE 404/504
Lecture 5
 Io, Fo are steady-state
p
point
on saturation
characteristic for initial Lm
 RMS = 0 or 1: determines
how the saturation
characteristic is entered.
 Output is information about
mangetization branch
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Spring 2013
ECE 404/504
Lecture 5
 If RMS = 0, this is current
versus flux
 If RMS = 1, this is RMS
current versus RMS
voltage at frequency of
first source in the system
 The 0,0 point is assumed
by the program
 Up to 10 points can be
entered
» Better to limit to 3-5
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U Viewing The Saturation
I
Characteristic
ECE 404/504
Lecture 5
 If RMS = 0, this is current
versus flux
 If RMS = 1, this is RMS
current versus RMS voltage at
frequency of first source in the
system
 The 0,0 point is assumed by
the program
 Up to 10 points can be
entered
» Better to limit to 3-5 for better
numerical behavior
» Does not include hysteresis
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Three Phase Model
Spring 2013
ECE 404/504
Lecture 5
 Icon changes with the connection type. Here
is three winding with all WYE
 Here is 2 winding with delta-wye
 Note that there is a point to connect to
measure magnetizing branch voltage
 Three leg core option
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Three Phase Model
ECE 404/504
Lecture 5
 Enter data for each
winding
 Select Y, D, or Zig-zag
 Three leg option here,
but better to use
specific case from pulldown menu.
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Three Phase ModelThree Leg Core
Spring 2013
ECE 404/504
Lecture 5
 Option to model
homopolar reluctance
» Saturable-Three Leg
 Much additional
information needed.
 See help menu.
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Creating a Circuit
ECE 404/504
Lecture 5
 Components are
highlighted
hi
hli ht d iin red
d until
til you
edit values
 Can connect components
together by dragging left
mouse button between
nodes and then clicking on
finishing node
 1 Ph or 3 Ph on context
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Selecting Node Names
Spring 2013
ECE 404/504
Lecture 5
 Double click left button to
get node data window
 Type node name in SWT
» 6 characters max
» ALL CAPS or numbers or
will have errors
 Can ground the node
» Name won’t matter
» Ground symbol will appear
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Selecting Node Names
ECE 404/504
Lecture 5
 Can choose to Display name on the screen
 If you have a connection between nodes, all
nodes will get a name you assigned when
use “Sub-process > Make Node Names” or
“Make ATP File”
» ATPDraw assigns names if you don
don’tt (XX0001,
(XX0001
etc)
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Building a System
Spring 2013
ECE 404/504
Lecture 5
 Can also


copy your
components
Remembers
output
requests
and values
Need to
enter new
names
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Probes and 3 Phase
ECE 404/504
Lecture 5
 Menu for voltage and



currentt measurements
t
“Probe Volt” is line to
ground voltage
“Probe Branch Volt
“puts in dummy branch
as does
d
““probe
b curr””
Select 1 or 3 ph
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Transient Analysis of
Control Systems (TACS)
Spring 2013
ECE 404/504
Lecture 5
 Introduced in EMTP in 1976
 Developed to model controls for HVdc
converters (Pacific Intertie)
 Model interactions between system
transients and control systems
y
 Each variant of EMTP has it own variant
 ATP has two: TACS and Models
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What TACS can do
ECE 404/504
Lecture 5
 Model control systems
» Generator excitation and governor control
» Control loops for power electronic converters
» Firing circuit for power electronics
» Relay algorithms
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What TACS can do
Spring 2013
ECE 404/504
Lecture 5
 Monitor and post-process
post process network variables
» Analog and digital filters
» RMS voltages and currents
» Calculate P and Q
» Compute motor/generator torque or flux
» Reference frame transformations
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ECE 404/504
Lecture 5
What TACS can do
 Simulate mechanical/electromechanical
 Non-linear reponses
 Create models for devices without built-in
models – for example, arc resistances
 Create harmonic sources
 Variable frequency sources
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TACS Relationship to
Network Solution
ECE 404/504
Lecture 5
 Control system models solved separate from network
» Different equation formats
» First network then TACS in each time step
» Leads to on step time delay
Power System
(Network)
Measurements
TACS
Commands
Controlled Sources
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ECE 404/504
Lecture 5
General Format
 TACS design from point of view of reproducing
Laplace domain block diagram
» Converted to difference equations
» Arbitrary connections of blocks
 Signal and variable names limited to 6


characters
Can implement digital controls
Some limited FORTRAN expressions
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Spring 2013
ECE 404/504
Lecture 5
TACS and ATPDraw
 ATPDraw Interface for TACS
» Not as nice as circuit interface,
interface but much improved
 Not essentially to always draw connecting lines
» Use the same variable names instead
» Will generate a warning message about duplicate
names when first run ATP file
 Several of the example cases shipped with
ATPDraw have TACS modelling
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ECE 404/504
Lecture 5
Built-in variables
 Enter these as input node names
» TIMEX = simulation time in seconds (from 0
0.0)
0)
» ISTEP = number of time steps since the start of the
simulation
» DELTAT = simulation time step
– (TIMEX=ISTEP*DELTAT)
» FREQHZ = system frequency in Hz (defined by first
sinusoidal source in the Network part of the
simulation)
» OMEGAR = 2 *  * FREQHZ (rad/sec)
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»
»
»
»
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Spring 2013
Pre-Defined TACS Internal
Sources
ECE 404/504
Lecture 5
ZER0 = 0.0
MINUS1 = -1.0
10
UNITY = PLUS1 = 1.0
PI = FORTRAN Compiler Constant for PI
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User-Defined TACS Sources
ECE 404/504
Lecture 5
 Used as inputs for other TACS blocks or to


control a TACS source in the network
User calls from TACS menu
As is the case for network sources, the
user defines start and stop time
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Spring 2013
User-Defined TACS Sources
ECE 404/504
Lecture 5
 Used as inputs for other TACS blocks or to control


a TACS source in the network
As is the case for network sources, the user
defines start and stop time
Options:
»
»
»
»
Type 11: DC Source (called Level Signal in rule book)
Type 14: Cosine (AC Source)
Type 23: Pulse (repeats, alternates between 0.0 and set amplitude
Type 24: Ramp (output rises from 0.0 to amplitude of set period
and repeats until stop time for the source or end of simulation
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TACS Measurements from
Network
ECE 404/504
Lecture 5
 Used as inputs for other TACS blocks
 Type 90: Node voltage measurement
» Node to ground voltage
 Type 91: Switch current
» Must be connected to a switch
 Type 92: Internal variable from special ATP

components
p
((dynamic
y
synchronous
y
machine or
universal machine)
Type 93: Switch position (output = 0.0 for open
switch and 1.0 for closed switch)
Intro to ATP and ATPDraw
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Spring 2013
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ECE 404/504
Lecture 5
Transfer Functions
 User can define general transfer functions
 Laplace
L l
d
domain
i polynomials
l
i l iin numerator
t and
d


denominator
Can have constant gain block (zero order on
numerator and denominator)
General Format:
G( s )
gain 
2
3
m
2
3
m
N 0  N 1 s  N 2 s  N 3 s  N m s
D 0  D 1 s  D 2 s  D 3 s  D m s
Intro to ATP and ATPDraw
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Spring 2013
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Sample Transfer Function
ECE 404/504
Lecture 5
G(s)
Intro to ATP and ATPDraw
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Limiters
Spring 2013
ECE 404/504
Lecture 5
 User can specify limits for transfer functions outputs
» 1st order or zero order only
» Can set hard (static) limits (enter numbers)
» Can use outputs from other TACS functions (dynamic
limits)
 Windup limiter
»
»
»
»
Zero order transfer function
TACS processes block and then looks at output
Prior to limit application, output can move far beyond limit
Time needed to back off of the limit
Intro to ATP and ATPDraw
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Limiters (continued)
ECE 404/504
Lecture 5
 Non-Windup limiter
» Doesn’t saturate and backs off limit quickly
» Implement with first order transfer function
– One pole, no zeros in the function
– Additional poles and zeros are ignored
 Both windup and non-windup limits occur in practice
» Need to understand behavior of the system
y
yyou’re
modeling
Intro to ATP and ATPDraw
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77
Built-In Devices
Spring 2013
ECE 404/504
Lecture 5
 Implement common functions difficult to make up
»
»
»
»
»
»
»
»
»
Frequency sensor
Externally controlled switch
Level switch
Transport delay
Pulse Delay
Digitizer
Point-by-point nonlinearity (lookup table)
Time controlled switch
Controlled integrator
Intro to ATP and ATPDraw
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»
»
»
»
»
»
»
»
Built-In Devices
Derivative
Input IF
Input-IF
Signal selector
Sample and track
Min/Max function
Min/Max tracking
Counter
True RMS
Intro to ATP and ATPDraw
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



ECE 404/504
Lecture 5
79
Free-Format FORTRAN
Expressions
Spring 2013
ECE 404/504
Lecture 5
Supplmental variables in rule book
S
Somewhat
h t free
f
format
f
t
ATP recognizes as device types 99, 98 and 88
Options:
» Algebraic operators: + , - , * , / , **
» Relational operators
– .EQ. , .NE. , .LT. , .LE. , .GE. , .GT.
– Ouputs are 0.0 or 1.0
Intro to ATP and ATPDraw
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Spring 2013
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Free-Format FORTRAN
Expressions
ECE 404/504
Lecture 5
 Allowed functions:
»
»
»
»
»
»
»
»
SQRT, ABS
SQRT
ABS, EXP,
EXP LOG,
LOG LOG10
SIN, COS, TAN, COTAN (argument in radians)
ASIN, ACOS, ATAN (answer in radians)
SINH, COSH, TANH
TRUNC, MINUS, INVRS
RAD DEG,
RAD,
DEG NOT
SIGN (-1 for neg. number, +1 for pos. number or zero)
SEQ6, RAN (random number generator)
Intro to ATP and ATPDraw
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81
Free-Format FORTRAN
Expressions
Spring 2013
ECE 404/504
Lecture 5
 Limitations:
»
»
»
»
The user is allowed up to 20 levels of nesting
nesting.
Can't do SQRT(A**2+B**2) and similar
Can combine functions: SQRT(ABS(INVRS(X) ) )
Does not allow: GOTO, IF, DO, SUBROUTINE, or
FUNCTION
Intro to ATP and ATPDraw
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Spring 2013
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ECE 404/504
Lecture 5
Outputs from TACS
 TACS controlled source in the network
» Source type 60
» The variable name in TACS and the name of the node the source is
connected to must match
» Including phase identifier (single phase source)





TACS controlled switches
Interface to type 59 (or 58) dynamic synchronous machine
Interface to type 19 dynamic (universal machine)
Plot data file
Variable inductor…..
Intro to ATP and ATPDraw
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83
Spring 2013
ECE 404/504
Lecture 5
Initial Conditions
 Can set initial conditions to improve start up
behavior
» Especially if correct outputs at time = 0+ are desired
 Network and TACS undergo separate steady-state
initialization, with network computed first
» TACS output to Network are initially zero unless
specified
 Especially
E
i ll useful
f l ffor:
» First order or higher transfer functions
» FORTRAN statements
» Several of the built-in devices
Intro to ATP and ATPDraw
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U
I Accessing TACS Models
Intro to ATP and ATPDraw
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I
85
TACS Sources
Intro to ATP and ATPDraw
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ECE 404/504
Lecture 5
Spring 2013
ECE 404/504
Lecture 5
Spring 2013
43
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TACS Devices
Intro to ATP and ATPDraw
87
U
I TACS Measuring Source
Intro to ATP and ATPDraw
88
ECE 404/504
Lecture 5
Spring 2013
ECE 404/504
Lecture 5
Spring 2013
44
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Source Dialog
Intro to ATP and ATPDraw
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89
Transfer Function
Intro to ATP and ATPDraw
90
ECE 404/504
Lecture 5
Spring 2013
ECE 404/504
Lecture 5
Spring 2013
45
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TACS Device Dialog
Intro to ATP and ATPDraw
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FORTRAN Statement
Intro to ATP and ATPDraw
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ECE 404/504
Lecture 5
Spring 2013
ECE 404/504
Lecture 5
Spring 2013
46
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Slave Source
Intro to ATP and ATPDraw
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Outputs from TACS
ECE 404/504
Lecture 5
Spring 2013
ECE 404/504
Lecture 5
 TACS node: Type
» 0=Output.
» 1=Input signal positive sum up.
» 2=Input signal negative sum up.
» 3=Input signal disconnected.
» (only necessary if node name is user
specified)
Intro to ATP and ATPDraw
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Node Dialog
Intro to ATP and ATPDraw
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95
TACS Outputs
Intro to ATP and ATPDraw
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ECE 404/504
Lecture 5
Spring 2013
ECE 404/504
Lecture 5
Spring 2013
48
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Output Dialog
Intro to ATP and ATPDraw
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I
97
RLC Circuit, Network
and TACS
ECE 404/504
Lecture 5
Spring 2013
ECE 404/504
Lecture 5
 Simple RLC circuit modelled as:
» Network components
» TACS only model
» Results Compared
Intro to ATP and ATPDraw
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Spring 2013
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ECE 404/504
Lecture 5
ATPDraw Diagram
GEN
VSRC
RL
VLC
U
LDEL
ISER
VOUT
LDEL
U
Intro to ATP and ATPDraw
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I
Spring 2013
99
ECE 404/504
Lecture 5
Compare Outputs
15
VOUT from TACS and VLC from Network
12
9
6
3
*10 -3
0
0
2
(file drawrlc.pl4; x-var t) t: VO UT
Intro to ATP and ATPDraw
4
v:VLC
100
6
8
10
Spring 2013
50
U
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ECE 404/504
Lecture 5
Example Results
15
Time Step Delay Between TACS and Network
12
9
6
3
*10 -3
0
0
2
(file drawrlc.pl4; x-var t) v:VLC
Intro to ATP and ATPDraw
4
v:LDEL
101
6
8
10
Spring 2013
51