外文翻译光伏并网逆变器Word格式.docx
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外文翻译光伏并网逆变器Word格式.docx
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质量保证开关只执行斩波行动,而第一季度,第四季度交换机确定方向的输出电压根据极性的电力系统。
因此,与一般全桥PWM逆变器执行完整的一块,该系统减少了开关损耗。
图.2显示波形的传统电流源逆变器。
它代表了波形的输出电压和电流,该电流通过电感,输入信号,每个开关。
图.3显示了脉冲转变电流源逆变器电路,用于降低开关频率和提高效率。
当太阳能电池模块输出电压的是高于或低于输出电压的转换器,则合成的电流源转换,这需要Buck
-
Boost变换器运作良好。
电路降压频率的逆变器是固定的,在60
[HZ]
,这是电力系统频率。
该过滤器(LS,CS)在输出端口的逆变器是一种低成本的能力,以改善波形的输出电流。
如果过滤器的高容量的使用,功率因数的系统将不统一,因为相位延迟。
图.4显示波形是电流源逆变器。
指标代表交换期间的升压斩波器,这个数字。
国际法协会,
ILF代表波形电感电流各自的转换和IDC代表输出电流的逆变器。
作为一个脉冲波形,输出波形的六脉冲移转换代表6波形开关频率TS.We采用了数字信号处理器(
TMS320F2812
)产生的PWM
6相移信号电流源逆变本文。
由于采用非对称PWM模式,波形的输出电流,这几乎是逆变器的波形相似,六乘以开关频率但不完全相同的。
图.5显示了各自的电感电流和输出电流的常规逆变器和逆变器相等的开关频率。
原文:
Grid-connected
photovoltaic
system
using
current-source
inverter
Recently,
there
has
been
a
growing
interest
in
alternative
energy
sources
because
fossil
fuel
and
atomic
power
plants
affect
the
environment
its
stability
(Nagao
Harada,1997;
Myrzlk,
2001).
Among
various
source
of
energy,
solar
stands
apart
as
it
is
clean
unlimited
moreover,
considerable
amount
research
conducted
recently
this
field.
A
consists
module,a
charge
battery,
an
inverter.
Only
inverters
operating
mode
are
included
classification,since
one
aims
PV
inverter
to
inject
sinusoidal
current
into
grid.
To
embody
operation
single-phase-grid-connected
for
module,it
general
topology
that
standard
full-bridge
voltage
(VSI),
which
can
create
grid
(Kjaer
2006).
This
two
problem
below.
(1)
battery
essential
store
electric
generated
by
plant.
But
problems
on
it’s
short
duration
pollution
along
with
economic
efficiency.
However,
transmitting
directly
utility
line
without
solve
these
problems.
In
process,
interface
circuit
called
links
direct
(DC)
output
from
cell
array
AC
system.
It
does
not
matter
if
current-source-inverter
lower
than
case
shorted
load
or
malfunction,
have
surge
short-circuit
(Myrzlk,
(2)
microprocessor
used
controller
achieve
good
characteristics
when
designing
systems
current-source-inverters.
controller,
reduce
value
inductance
ripple
current,
high
switching
frequency
required
inverter,
however,
restricted
loss
sampling
processor.
Fig.
shows
structure
PWM
linking
cells
(Mohan
1995).
fiveswitches,
inductor,
LC
filter
at
port.
operates
modes.
The
QA
switch
only
performs
chopping
action,
while
Q1–Q4
switches
determine
directions
according
polarity
Therefore,
compared
PWMinverter
complete
chopping,
reduces
loss.
waveforms
conventional
represents
through
input
signals
each
switch.
3
proposed
six-pulse-shift
improve
Whenever
module
higher
converter
compositing
converter,
buck-boost
operate
well.
buck-frequency
fixed
60
[Hz],
frequency.
(LS,
CS)
port
low
capacity
waveform
current.
If
were
be
used,
factor
would
unity
phase
delay.
4
TS
period
choppers
figure.
ILA–ILF
represent
inductor
currents
respective
converters
IDC
As
operational
waveform,
six
TS.We
DSP
(TMS320F2812)
generate
six-phase-shift
signal
paper.
result
asymmetricPWM
mode,
almost
similar
multiplied
but
exactly
same.
5
equal
frequencies.
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