Solar photovoltaic grid-connected inverter selection
The 10 MW solar photovoltaic grid-connected power generation system is designed as 10 1 MW photovoltaic grid-connected power generation units. Each grid-connected power generation unit requires 4 inverters with a power of 250 KW. The entire system is configured with 40 photovoltaics of this type. Grid-connected inverters form a 10 MW grid-connected power generation system. Select inverters with reliable performance, high efficiency and multi-machine parallel connection. The inverter with rated capacity of 250 KW is used in this project. The main technical parameters are listed in the following table:
Table 13 250KW Grid-connected Inverter Performance Parameter Table
Capacity 250KW
Isolated power frequency transformer
Maximum solar array power 275KWp
Maximum array open circuit voltage 900Vdc
Solar Battery MPPT Range 450Vdc～880Vdc
Maximum array input current 560A
MPPT accuracy >99%
Rated AC output power 250KW
Total current waveform distortion rate < 4% (at rated power)
Power factor>0.99
94% efficiency
Allowable grid voltage range (three-phase) 320V to 440AC
Allowable grid frequency range 47~51.5Hz
Self-consumption power at night <50W
Protection function reverse polarity protection, short circuit protection, island effect protection, overheat protection, overload protection, ground protection, undervoltage and overvoltage protection, etc.
Communication Interface (optional) RS485 or Ethernet
Use ambient temperature -20°C～+40°C
Use ambient humidity 0 to 95%
Size (depth × width × height) mm800 × 1200 × 2260
Noise ≤ 50dB
Protection class IP20 (indoor)
Grid monitoring according to UL1741
Electromagnetic Compatibility EN50081,part1;EN50082,part1
Grid interference EN61000-3-4
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