<s>
In	O
electrical	O
power	O
engineering	O
,	O
power	B-Algorithm
systems	I-Algorithm
CAD	I-Algorithm
is	O
computer-aided	B-Application
design	I-Application
(	O
CAD	B-Application
)	O
software	O
that	O
is	O
used	O
to	O
design	O
and	O
simulate	O
electrical	O
power	O
systems	O
in	O
commercial	O
and	O
industrial	O
buildings	O
.	O
</s>
<s>
Electrical	O
power	B-Algorithm
systems	I-Algorithm
CAD	I-Algorithm
tools	O
are	O
used	O
by	O
electrical	O
power	O
systems	O
engineers	O
.	O
</s>
<s>
Power	B-Algorithm
systems	I-Algorithm
CAD	I-Algorithm
tools	O
increase	O
the	O
productivity	O
,	O
efficiency	O
,	O
and	O
effectiveness	O
of	O
electrical	O
systems	O
designers	O
by	O
providing	O
a	O
design	O
foundation	O
that	O
allows	O
power	O
systems	O
to	O
be	O
created	O
quickly	O
and	O
by	O
enabling	O
design	O
engineers	O
to	O
test	O
the	O
safety	O
and	O
integrity	O
of	O
their	O
design	O
concepts	O
.	O
</s>
<s>
Power	B-Algorithm
systems	I-Algorithm
CAD	I-Algorithm
software	O
products	O
allow	O
organizations	O
to	O
develop	O
power	O
systems	O
designs	O
,	O
with	O
faster	O
turnaround	O
time	O
,	O
than	O
with	O
previous	O
manual	O
methods	O
.	O
</s>
<s>
The	O
use	O
of	O
personal	B-Device
computers	I-Device
with	O
graphical	O
displays	O
lead	O
to	O
development	O
of	O
integrated	O
suites	O
of	O
power	O
systems	O
design	B-Application
software	I-Application
,	O
which	O
allowed	O
several	O
different	O
power	O
system	O
studies	O
to	O
be	O
carried	O
out	O
on	O
the	O
same	O
input	O
model	O
data	O
.	O
</s>
<s>
The	O
electrical	O
power	B-Algorithm
systems	I-Algorithm
CAD	I-Algorithm
process	O
,	O
frequently	O
called	O
power	O
systems	O
"	O
modeling	O
,	O
"	O
typically	O
consists	O
of	O
two	O
distinct	O
stages	O
:	O
</s>
<s>
The	O
same	O
model	O
used	O
for	O
computer-aided	B-Application
design	I-Application
of	O
a	O
power	O
system	O
can	O
be	O
used	O
as	O
the	O
basis	O
for	O
real-time	O
monitoring	O
and	O
modeling	O
of	O
the	O
system	O
,	O
giving	O
network	O
operators	O
a	O
quantitative	O
value	O
for	O
any	O
proposed	O
changes	O
in	O
system	O
operating	O
conditions	O
.	O
</s>
<s>
Several	O
electrical	O
engineering	O
calculations	O
and	O
tests	O
can	O
be	O
performed	O
on	O
a	O
power	B-Algorithm
systems	I-Algorithm
CAD	I-Algorithm
model	O
,	O
including	O
:	O
</s>
