6
This
chapter
introduces
the
inverter
and
describes
its
functional
model
,
network
application
,
appearance
,
dimensions
,
and
working
process
etc
.
2
.
1
.
1
Function
This
series
is
a
single-phase
grid-tied
PV
string
inverter
(
transformer
less
)
that
converts
the
DC
power
generated
by
PV
strings
into
AC
power
and
feeds
the
power
into
power
grid
.
2
.
1
.
2
Model
Description
Figure
2
.
1
shows
a
model
number
of
the
inverter
,
using
xK
as
an
example
.
Figure
2
.
1
Model
number
descriptions
2
.
2
.
1
Grid-tied
PV
Power
Systems
The series applies to grid-tied PV power systems for outdoor power stations. Typically, a grid-tied
PV power system consists of PV modules, grid-tied inverters, AC distribution units, and low-voltage
power grid, as shown in Figure 2.2.
The
inverter
is
transformerless
.
Add
an
isolation
transformer
before
grounding
the
positive
/
negative
terminal
of
PV
modules
(
like
Thin
Film
module
)
for
operation
.
Do
not
connect
PV
modules
in
parallel
to
several
PV
inverters
for
operation
.
WARNING
WARNING
2
.
1
Functional
Models
2
Overview
of
the
Inverter
2
.
2
Network
Application
CPS SCA xK TL -S/SM
Product series
Transformerless
S-Single MPPT
,
SM-2MPPT
Chint power systems
Rated AC output power
CPS SCA-S/
SM Series Inverter
