<s>
A	O
diesel	B-Algorithm
generator	I-Algorithm
(	O
DG	O
)	O
(	O
also	O
known	O
as	O
a	O
diesel	O
Genset	O
)	O
is	O
the	O
combination	O
of	O
a	O
diesel	O
engine	O
with	O
an	O
electric	O
generator	O
(	O
often	O
an	O
alternator	B-Algorithm
)	O
to	O
generate	O
electrical	O
energy	O
.	O
</s>
<s>
This	O
is	O
a	O
specific	O
case	O
of	O
engine	B-Algorithm
generator	I-Algorithm
.	O
</s>
<s>
Diesel	B-Algorithm
generator	I-Algorithm
size	O
is	O
crucial	O
to	O
minimize	O
low	O
load	O
or	O
power	O
shortages	O
.	O
</s>
<s>
Set	O
sizes	O
range	O
from	O
8	O
to	O
30kW	O
(	O
also	O
8	O
to	O
30kVA	O
single	B-Algorithm
phase	I-Algorithm
)	O
for	O
homes	O
,	O
small	O
shops	O
,	O
and	O
offices	O
,	O
with	O
the	O
larger	O
industrial	O
generators	O
from	O
8kW	O
(	O
11	O
kVA	O
)	O
up	O
to	O
2,000	O
kW	O
(	O
2,500	O
kVA	O
three	O
phase	O
)	O
used	O
for	O
office	O
complexes	O
,	O
factories	O
,	O
and	O
other	O
industrial	O
facilities	O
.	O
</s>
<s>
Diesel	B-Algorithm
generators	I-Algorithm
are	O
not	O
only	O
for	O
emergency	O
power	O
,	O
but	O
may	O
also	O
have	O
a	O
secondary	O
function	O
of	O
feeding	O
power	O
to	O
utility	O
grids	O
either	O
during	O
peak	O
periods	O
,	O
or	O
periods	O
when	O
there	O
is	O
a	O
shortage	O
of	O
large	O
power	O
generators	O
.	O
</s>
<s>
Ships	O
often	O
also	O
employ	O
diesel	B-Algorithm
generators	I-Algorithm
,	O
sometimes	O
not	O
only	O
to	O
provide	O
auxiliary	O
power	O
for	O
lights	O
,	O
fans	O
,	O
winches	O
etc.	O
,	O
but	O
also	O
indirectly	O
for	O
main	O
propulsion	O
.	O
</s>
<s>
One	O
or	O
more	O
diesel	B-Algorithm
generators	I-Algorithm
operating	O
without	O
a	O
connection	O
to	O
an	O
electrical	O
grid	O
are	O
referred	O
to	O
as	O
operating	O
in	O
island	O
mode	O
.	O
</s>
<s>
An	O
islanded	O
power	O
plant	O
intended	O
for	O
a	O
primary	O
power	O
source	O
of	O
an	O
isolated	O
community	O
will	O
often	O
have	O
at	O
least	O
three	O
diesel	B-Algorithm
generators	I-Algorithm
,	O
any	O
two	O
of	O
which	O
are	O
rated	O
to	O
carry	O
the	O
required	O
load	O
.	O
</s>
<s>
Failure	O
to	O
synchronize	O
before	O
connection	O
,	O
could	O
cause	O
a	O
high	O
short	B-Application
circuit	I-Application
current	O
or	O
wear	O
and	O
tear	O
on	O
the	O
generator	O
or	O
its	O
switchgear	O
.	O
</s>
<s>
A	O
diesel	B-Algorithm
generator	I-Algorithm
will	O
take	O
more	O
load	O
when	O
the	O
fuel	O
supply	O
to	O
its	O
combustion	O
system	O
is	O
increased	O
,	O
while	O
load	O
is	O
released	O
if	O
the	O
fuel	O
supply	O
is	O
decreased	O
.	O
</s>
<s>
In	O
addition	O
to	O
their	O
well	O
known	O
role	O
as	O
power	O
supplies	O
during	O
power	O
failures	O
,	O
diesel	B-Algorithm
generator	I-Algorithm
sets	O
also	O
routinely	O
support	O
main	O
power	O
grids	O
worldwide	O
in	O
two	O
distinct	O
ways	O
:	O
</s>
<s>
Emergency	O
standby	O
diesel	B-Algorithm
generators	I-Algorithm
,	O
such	O
as	O
those	O
used	O
in	O
hospitals	O
and	O
water	O
plants	O
,	O
are	O
,	O
as	O
a	O
secondary	O
function	O
,	O
widely	O
used	O
in	O
the	O
US	O
and	O
,	O
in	O
the	O
recent	O
past	O
,	O
in	O
Great	O
Britain	O
to	O
support	O
the	O
respective	O
national	O
grids	O
at	O
times	O
for	O
a	O
variety	O
of	O
reasons	O
.	O
</s>
<s>
Increasing	O
use	O
of	O
banks	O
of	O
diesel	B-Algorithm
generators	I-Algorithm
(	O
known	O
as	O
"	O
diesel	O
farms	O
"	O
)	O
is	O
being	O
made	O
in	O
Britain	O
to	O
balance	O
the	O
fluctuating	O
output	O
from	O
renewable	O
energy	O
sources	O
,	O
such	O
as	O
wind	O
farms	O
.	O
</s>
<s>
Many	O
gen-set	B-Algorithm
manufacturers	O
have	O
software	O
programs	O
that	O
enable	O
the	O
correct	O
choice	O
of	O
a	O
set	O
for	O
any	O
given	O
load	O
combination	O
.	O
</s>
