Transcript Click here to the Cart Demonstration Presentation

The CART Software
Developed by Ciber Terrasoft (Pty.) Ltd.
Overview
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Introduction to product
Introduction to company
Evaluation of product
Walk through of a simple example
Outputs/Retports/etc
Data Capturing
What is CART?
• CART is a CAD-based integrated design
tool to support the detailed design of MV
and LV distribution networks.
• Using CART:–
–
–
–
Design distribution networks,
Analyse network performance,
Produce final construction drawings,
Generate Bill of Materials and Reports.
What is CART? (cont….)
• CART is a productivity tool to support the
detailed design of LV distribution
networks
• CART was developed at Wits University in
close collaboration with Eskom over the
past 12 years
• When using CART the designer focuses
on engineering- the computer does all of
the tedious and repetitive tasks
What is CART? (cont…)
• CART supports all aspects of the
distribution design workflow
• CART is used by Eskom and by
consulting engineers in South Africa
and in other countries
What is Ciber Terrasoft?
• Ciber Terrasoft (Pty) Ltd (“Terrasoft”)
was set up in 1998 to support CART
• Terrasoft has developed over 12 years
of experience and expertise in the
specialised field of software tools to
support electrical distribution
engineering
What is Ciber Terrasoft?(cont….)
• Terrasoft supports CART, offers
training and specialised software
customisation and development
• Terrasoft works in alliance with other
software development companies
• Offers various services around the
area of network data capturing
Evaluation of CART
• From 2000 to 2001 Eskom DT and
Terrasoft undertook a detailed
evaluation of the CART software
• CART was found to do the following:
– increase engineering productivity by
three times,
– eliminate errors and
– improve the overall quality of designs.
Evaluation of CART
• 2002 winner of a prestigious  Award in
South Africa for CART’s energy saving
capability.
– (The  Award is sponsored by Eskom & endorsed
by the Department of Minerals & Energy)
• In South Africa, CART could save: consulting engineers R2 million/annum in
improved productivity;
 Eskom R180 million/annum in reduced
construction costs;
 17GWh per annum in reduced network losses.
A Walk through example
• CART works within a 3rd party CAD
program (front-end) called MicroStation
developed by Bentley USA.
• Currently uses Microsoft Access™
database for storing network info.
• Uses Microsoft Excel™ for costing the
project, BOM, etc.
Initial title screen
This example uses screen
captured images to portray
concepts. The first step is create a
brand new project using wizard
Select Drawing
• Select dgn drawing
on which the new
distribution network
will be
placed/designed.
Select conductors/cables
• Select only the
required conductor
types for this
project.
• Additional conductor
types can be added
to the library
Select transformers
• Select only the
required transformer
types for this
project.
• Additional
transformer types
can be added to the
library
Select default materials
• Select material for
various applications eg:
• Type of MV pole
• Type of LV pole
• Types of pole-top
conductor supporting
structures for various
stringing angles
Select calculation parameters
• Calculations done only
for LV portion of the
network.
• One of the
methodology used is
Herman-Beta method
developed by Prof. Ron
Herman
Design Environment
Now that the project has been
configured, the user is presented
with the design environment.
Identify consumer locations
This is a zoomed in view of the
bottom left of the township. The
stand boundaries are indicated by
the black lines while the road
reserve is indicated by the brown.
The consumer locations are
identified (shown by the purple
circles) and entered into a
database so that the stand
number, voltage, phasing info,
etc can be tracked.
Select transformer type
Zoom into an area and begin
the procedure to define a
transformer zone. First select
the size and rating. Then
select all the other devices
such as fuses and the like that
need to be installed along
with the transformer.
Draw transformer zone
The transformer zone is
drawn as indicated by the
blue line. The stands are
automatically counted and
presented in a window.
Based on the estimated
loading of the transformer
the zone can be resized until
the desired transformer
loading is achieved.
Optimum transformer location
Once transformer zone is finalised, CART
will place the transformer at load centroid
of this zone. The transformer needs to be
moved to practical location.
Optimum transformer location
Move the transformer to a practical
location which can be used to service
everyone in the zone
Add LV feeder
Poles are placed whenever there is a
change in direction. Poles can also be
placed along the route at certain places if
The current span (distance from the most
required.
CART
has a feature for
Arecently
construction
is used
to indicate
placedline
pole)
is displayed
in metres to
determining
optimum
spans.
the
route
the
conductor
to
guide
thethat
designer
with poleisplacement.
follow.
The total distance from the start of
the construction line is also indicated.
In this case that is the total distance
from the transformer.
Add LV feeders
Once the conductor route is specified using
the construction line, poles are inserted
wherever they are required along the route.
This would be in addition to the poles
Conductor
(feeder) segments are
specified
by the designer.
then added along the route as
indicated by the red lines.
Service feeders are automatically
extended from the poles along the
route to the nearest consumer.
Add LV feeders
Once the transformer zone is completed the
calculations can be done. The first thing to do
is the Auto Phasing. This optimally assigns
the loads to the available phases so that the
transformer is evenly balanced.
In a similar manner, the remaining
feeders can be added, until all the
consumers are connected up.
Now the voltage calculations can be done.
The values are calculated and displayed
on the screen next to each consumer. Real
feeder and service distances are used for
the calculations.
Calculations
The voltage texts are colour coded to
indicate the tolerance. The text in green is
can certainly
improved
by changing the
within 5% Voltage
of nominal,
while thebe
text
in
settingison
the transformer
yellow (nottap
legible)
within
10%. The (straight forward). It
improved
upgrading the feeder section
voltages incan
redalso
havebeexceeded
thebytolerance
to a action
larger conductor
and corrective
is required.as shown in the next slide.
Re-Calculation
Please note that the voltage text colours
and the percentage tolerances are
completely configurable to suit your needs.
Alternatively, the tap setting on the transformer can be increased by
editing
thethe
transformer’s
can
also see
Though
voltages areproperties.
not legibleOne
in the
image,
onethe
canphase
see that
balancing,
voltages
at the secondary
bushings, currents,
losses,one
etc
they are yellow
in colour
which is acceptable.
In this manner
could go about adjusting the network until all the voltages are
acceptable.
Pole labeling
This is the pole number. The first 2/3
digits indicate the transformer number.
The alphabet indicates the feeder name.
The last two digits indicate the pole
Once the the zone layout isnumber
completed
to that
the designer’s
satisfaction
along
feeder. In this
case,
the pole labels can be determined.
CART
examines
this is the
first pole
alongthe
thevarious
E feeder.
5-character
pole
code that
structures required, angles,This
etc,istothe
determine
all the
materials
exactly allnumbered.
the materials that
required. All the poles areindicates
also automatically
are required at this location. CART
generatesina corresponding table that
This is the phasing information
enable one to decipher this code.
the order of Red Whitewould
and Blue.
This indicates that there are 4
customers on the blue phase.
Adding MV feeder
The green colour line
indicates the route that
the MV feeder travels
to the transformer in
this township.
MV source indicating the T-off
point from which the MV feeder
will run to the township
CART allows the MV feeder to share poles with the
LV feeder which can reduce infrastructure costs. If
any of these poles are moved then both the MV and
LV feeders will be modified together.
Adding the Drawing Key
The drawing key allows one to
decipher the 5-character code that
has been placed on all the poles.
Costing the project
Since the network is captured in a relational database
as it is drawn, it is possible to cost the project by
simply extracting the information from that database.
This
allallthe
conductors
and
lengths
as
This
islists
alists
summary
sheet forconductors
all
thetheir
costs
associated
This
the
service
and
their
This
lists
all the material
structures
and
their
used
in
the
project.
Note
that
the
costs
are
always
with
the project.
Note
that
the costs
are the
always
lengths
as
used
in
the
project.
Again
costs
costsdown
as used
intransformer
the project.zone.
Again the costs
broken
per
broken
down down
per transformer
zone. The
detailed
are
broken
per
transformer
zone.
are broken down per transformer zone.
tabs of the spreadsheet will follow.
Outputs: Construction Dwg
The customised line style indicates the
conductor
the number of
The symbol library that CART
uses anddiameter
the line and
styles
Egconductor
35mm2 and
2 phase.
used to represent the variousphases.
different
types
can be configured as desired. Even customised line
styles can be used as required by Eskom
This is a 3 phase Fox conductor.
Outputs: ReticMaster™
CART can export the network to
ReticMaster™ with the desired level
of detail. This options exports a single
zone but captures the load information
at the junction or poles.
CART can export the network to
ReticMaster™ with the stand and service
conductor information included.
Outputs: ReticMaster™
CART can export the an enitre network to
ReticMaster™ including the MV. This
option does not export the load
information at the junction or poles.
CART can export the entire network to
ReticMaster™ with the stand and service
conductor information included.
Outputs: Reports
For each transformer zone, the
following network details are listed:• Transformer loading,
• Losses,
• Loading on each phase,
• Voltage and Current at the
secondary bushings
All the customers are
listed along with their
details. The customer list
is sorted in ascending
order of the voltage
The
is plot
for the
feeder
on the
network
Thisplot
is the
forshortest
the longest
feeder
in the
network.
One can see that
it reveals
a greatplot
amount
ofthe
detail.
This
is
a
summary
for
all
Voltage is shown on the Y-axis. The X
feeders from
transformer.
axis intersects
at thethe
207V
point as
voltages below this are unacceptable.
Outputs: Volt Plots
A single plot is generated for
each main feeder from the
transformer
Each stand number at the end of the service
The X axis shows the distance
feeder is displayed. This allows one to
from the The
transformer
in meters.
line
indicates
thevoltages.
position
identify consumers
who
have low
of the pole along the plot and
The plot indicates the voltages for each phase
displays the pole number.
using a different colour. The blue lines at the
end indicate the voltage drops of the service
feeders. This is just a summary plot.
Outputs:
For each feeder, the
following information is
Line
Diagram
displayed:the diagram.
feeder length
Details of the zone are shown at the top of• the
• the max current and
loading percentage on the
conductor
• the conductor type
For each nodes (poles), the
following information is displayed:• pole number,
• minimum voltage,
• the fault level and the distance
from the transformer
• the number of consumer allocated
The single
line
diagram phases.
is for the entire zone.
to the
respective
Outputs: Project Statistics
For a project with a large number of transformers, the
Some further
stats isisprovided
theeach
overall
design.
following statistics
information
displayedonfor
zone:These figures are used to assess the level of optimisation
• no. of connections,
• the loading,that has been undertaken by the designer.
• the length of new MV and LV feeders,
• the network losses.
Outputs: BOM
The structures
During
normalcan
costing
be exploded
CART works
to obtain
at the
thestructure
Bill of Materials
level. Upon
which are
completion,
listed
by partthe
numbers
structures
(in this
can case
be exploded
the SAPtonumber
obtain as
theused
Bill by
of Materials
Eskom)
Network Data Capturing
If only a CAD drawing is available then it can be
converted to a CART project so that the network can
simulated. Extensions and/or infills can then be
planned accordingly. However, during costing only
the extensions and/or infills will be considered.
Network Data Capturing
Since a CAD drawing has no ‘intelligence’ associated with
it CART has to identify various features and convert it to
CART elements which can then be used to do a trace.
Before capturing specify the
levels on which the specific
information should be sought.
Specify the cell names that
need to be sought when
tracing the network.
Network Data Capturing
CART has captured the network by recognising the
symbols and the conductor types. The previous
CAD information has been replaced with the CART
conductor and symbol information. One can now
add infills and/or extensions to the network.
CAD drawing has been captured into CART.
Extensions/Infills
The extended network is
calculated and costed.
For the purpose of this demonstration, assume that the new
connections as shown in the circle above have been identified.
It can be seen that only the extension (6 new customers) is
costed. The other tabs of the cost spreadsheet are not shown.
Interface with SinCal
Now seenanwithout
Consider
MV/LV
the cadastral
layout
as showmap
here
Connect with SinCal so that
the network information can
be transferred.
Interface with SinCal
SinCal is brought into view with the MV network layout. The
required simulations can be analysed as required before
transferring the results back to CART.
Interface with SinCal
Now that the MV nominal voltages have been set at the
transformers, the LV calculations must be re done so that the
correct voltages for the customers can be determined.
Thank you
Should you require more information about the product or
services, please do not hesitate to get in touch with us.
Ciber Terrasoft (Pty.) Ltd.
Email:
url:
Tel:
Fax:
[email protected]
www.terrasoft.co.za
+27 (0)11 315 3837
+27 (0)11 315 8332
Block B7, GreenOaks Office Park, Cnr of Gregory Ave &
Bekker Street, Vorna Valley – Midrand
P O Box 5705, Halfway House, 1685, South Africa.