After sunshine power needs research and analysis and research and development, the industry's first double-sided inverter SG80BF, recently introduced, has aroused strong repercussions in the industry.
Inverter DC side of each string of input current increased to 12.5A
As we all know, the DC output current of the double-sided module is higher than that of the conventional components. According to the simulation and test result of the Class I resource illumination region Golmud provided by the double-sided component manufacturer, the output current peak value is 11.75A under the condition that the backside gain is 30% The input current of the inverter DC side is required to be increased. Based on the actual test data of some existing component manufacturers, the input current per string of the SG80BF DC side is increased to 12.5A to meet the current increase of the double-sided component.
The maximum AC output power of the inverter is 104kW
Depending on the conditions of the ground reflection, the back of the double-sided components can generally increase the power generation by about 5-30%, so the output power of the double-sided inverter also needs to be specially designed. SG80BF rated power of 80kW, 45 ℃ environment 1.3 times the rated power to achieve sustained output, that is, the maximum output power inverter side 104kW.
Regardless of DC loss, the standard irradiance, an SG80BF double-sided inverter, configuration 80kW components, consider the case of 30% backside power generation gain, the inverter can work normally, and the full power output. It can be flexibly configured considering factors such as system DC side loss, lighting conditions and different backside gains.
Light-duty efficient, smart fan cooling
Due to the low light efficiency of the double-sided components, the SG80BF enhances the conversion efficiency of the low-power section under weak light by optimizing the system hardware and software design, and starts early and shut down late so as to maximize the advantages of the double-sided components and effectively enhance the rainy weather Day and morning and evening periods of power generation.
In addition, due to the increased power generation of double-sided components, the inverter is in full operation for a long time and has higher requirements for heat dissipation. The SG80BF adopts the intelligent fan cooling to avoid the power generation loss caused by the high temperature derating. Inverter internal devices Lower temperature rise, more reliable operation.
Support 2.5MW sub-array design
According to the lowest system design principle of LCOE, SG80BF is recommended to use 2.5MW sub-array capacity. The inverter output side can be directly connected to the transformer, eliminating the need for AC combiner boxes. Meanwhile, the integrated tracking system has dual redundant power supply and communication interfaces. PLC communication, Maximize the system investment, integrated component IV curve online scanning capabilities, rapid positioning power generation string abnormalities, to maximize system revenue.
According to the different regions of the light resource area, different ground back reflection of different gain, the system design is different.According to the 310W components, the back of the gain set to 25%, various types of light resource area recommended access scheme as shown in the following table .
In summary, SG80BF DC side single-string input current increased to 12.5A, AC side of 1.3 times the long-term rated power continuous output, light and efficient, can perfectly match the power requirements of the current duplex components.System design, sub-array capacity 2.5MW is recommended. In the case of 10% -30% gain on the back side of the duplex components, the inverter can be flexibly configured according to the lighting conditions and different backside gain conditions.
