System description
The distributed power generation system is composed of a hydrogen fuel cell stack engine, a power grid-connected inverter, and a power monitoring system.
Hydrogen fuel cell engines consume hydrogen to produce electric alenergy. The grid-connected inverter includes DCF and DC/AC. DCF realizes thes table control of the current of the stack and boosts it. DC/AC completes the inverter grid-connecting function and completes the grid-connecting on the 380V distribution network side.
Description of grid-connected inverter
This grid-connected inverter has two main parts DCF and DC/AC. The input part of the grid-connected inverter is a fuel cell stack, and the currentof the stack is controlled by DCF; the DCF output is directly connected to the high-voltage DC bus, the inverter completes the inversion, and the 380V AC is connected to the grid through the isolation transformer.
The DCF and DC/AC of the grid-connected inverter have CAN/485 communication and are equipped with a touch screen. With active and reactive control functions.
The grid-connected inverter is also equipped with input and out put EMI filters to make it work without electromagnetic pollution.
Due to the use of silicon carbide devices, the conversion efficiency is high compared to similar products.
The grid-connected inverter is anintegrated design of DCF and inverter, no need to configure a cooling pump, and it is easy to use.
The main specifications are asfollows:
|
Technical parameter |
||
|
AC output |
The output voltage |
Three-phase 360V-400V |
|
Output line connection |
L1,L2,L3,PE |
|
|
Output frequency |
50/60Hz±10% |
|
|
effectiveness |
≥ 94.5% |
|
|
DC input (Each line) |
Maximum voltage Umax |
800V |
|
Maximum current Imax |
400A |
|
|
Maximum power Pmax |
125KW |
|
|
Voltage adjustment (Each line) |
Input voltage range |
50-800VDC |
|
Accuracy |
＜0.1%Umax |
|
|
Current adjustment (Each line) |
Input current range |
0-400ADC |
|
Accuracy |
＜0.1%Imax |
|
|
Power adjustment |
Output power range |
0-250KW |
|
Accuracy |
＜0.5%Pmax |
|
|
Overload capacity |
Voltage, current, power |
110%Umax、110%Imax、110%Pmax |
|
Responding speed |
10%~90%h |
＜500us |
|
0%~10%or90%~100% |
＜2ms |
|
|
Insulation withstand voltage |
DC input to housing |
±3000V DC |
|
AC input to DC input |
±3000V DC |
|
|
Environmental conditions |
Operating temperature |
0-50°C |
|
Storage temperature |
﹣20-70°C |
|
|
environment humidity |
20～90%R.H，Without condensation |
|
|
Noise |
1 meter away from the device and 1.6 meters above the ground |
＜65（dBA） |
|
Display and control panel |
CV,CC,CP operating mode, active and reactive power can be adjusted, can be remotely controlled by panel control or CAN communication |
|
|
Control interface |
CAN、485，Plug and play slot |
|
|
Protection function |
over temperature, over voltage, over current, over power, short circuit, island and other protections |
|
|
Protection class |
IP21 |
|
|
Dimensions (width x height x depth， mm) |
1202 * 1903* 899 |
|
|
Wight（kg） |
1700 |
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