详情
★System
Function
l Connect
to DC Power Supply and Direct-ouput Power Grid
directly
DC power supply refer to devices included solar panels,
batteries and wind power generators with AC/DC controller, etc. All
DC power supply output voltage fit with inverter input voltage
setting range which is ****0VDC.
Power grid refer to single phase
civilelectricity grid. Such as
**0V（*****0V）and
**0V（******0V）single
phase civil electricity grid.
Shengyang small power on-grid inverters can connect to
power grid directly and uploading electric power directly because
of inverter output current wave form is pure sine wave which is
same as civil electricity grid.
There must be electricity on power grid is first
necessity of inverter operating. When there is power outage or
fault of power grid, inverters will be not operating. And it is the
biggest difference between on-grid inverter and off-grid inverter.
l AC
0 Angle Phase High Precision Auto-detection
MCU process for high-precision detection and analysis
after AC 0 angle phase pass through isolation amplifier and input
into MCU, phase shift rate is less than 1%, and finally achieving
high-precision of cophasal modulation AC combined
Output.
l Synchronous
High-frequency Modulation
In process for grid connectivity, usually approach with
cophasal angle for grid(ie, when total current of inverter and grid
is 0, combined current by switch). But our inverter approach for
grid with same frequency and same pahse is DC to AC first, then
rectified AC current into pulse electric which is half-frequency
**0Hz, finally combined pulse electric modulation with current of
grid and then fed into power grid.
l Pure
Sine Wave Output
Adopting Sinusoida PWM process for pure sine wave output
which is same wave form of grid. No interference for
grid.
l Superstrong
Shadow Resistance of Inverter
Adopting high frequency conversion operating, less
transimission loss will be. In cloudy days or inadequate sunshine
days, if only there is 3W*5W output from power supply and input
into inverter, inverter can be operate AC conversion. But of cause,
output is proportional input. The more input power the more output
power and vice versa. Inverter can operate in such low input power
supply, it’s indicate inverter power conversion operating times can
be up more than 8 hours every day, and this is an advantage which
is large power inverter can not be compared with.
l Maximum
Power Point Tracking (MPPT)
Output of solar array had characteristics of nonlinear.
Output affected by sunrays, ambient temperature and loadings, and
output power of solar array can be maximized at a certain output
voltage only. Solar array output power operating at peak voltage
output which we called MPP-maximum power point. For more
effectively operate for solar array, it’s important for track down
max output power of solar array.
Shengyang samll power inverter MPPT operating principle:
in a specified period, MPU actively adjustable for PWM’s duty ratio
regularly, changing output current of solar panels and leading to
output voltage changing, checking output voltage and output current
of solar panels, computing output power of solar array, then track
down max power point managing by maximum power point tracking
strategy.
l APL
(Power Automatically Locked)
When MPPT track down the max power point, inverter will
be operating of locking in max power point automatically, so as to
keep operating max power output of DC power supply device within a
corresponding period and achieve more stable output
power.
l Automatically
Adapt To Different Power Loading
Adapt to different power loading because of Synchronism
in same frequency between inverter output and power grid. Such as
inductive load, resistive load, soluble load.
l Constant
Current, Constant Power, Current Limiting
Protection
Synchronism in same frequency between inverter output
and power grid, follow up power grid and take power grid as strong
backup to achieve constant current, constant output power, without
any overload and any over-current.
l Automatically
Turn Off and Stop Output When Fault of Grid(Islanding
Protection)
When there is fault or outage of electricity power grid,
inverters will be turn off automatically and stop operating within
0.5 second.
l Inverters
Stacking (online in parallel installation of inverters
using)
Large output power can be operating by stacking
inverters in parallel installation method.
l High-Frequency
High Conversion Rate
Adopting magnetic core which import from Janpan for
inner transfomer. High conversion and less loss make higher
efficiency of output.
