The island rooftop solar power generation system is put into use in the school power supply, if the project uses the US standard voltage, the following aspects should be considered:

 

I. Overview of the American standard voltage standard

According to the American Voltage Standard (ANSI C84-la-1980), the electricity supply system in the United States is mainly divided into several different voltage levels, including but not limited to:

 

115 ~ 120V system: This is a common voltage level in the United States civil power system, suitable for single-phase three-wire power supply, the frequency is 60Hz. When there is lighting, the voltage range at the electrical equipment is 110 ~ 125V, and the voltage range at the power supply point is 114 ~ 126V. When there is no lighting, the voltage range is slightly different, but the overall is still between 108 and 125V.

460 ~ 480V system: This is mainly used for industrial electricity, including 480/277V three-phase four-wire system. When there is lighting, the voltage range of the electrical equipment is 440 ~ 500V, and the voltage range of the power supply point is 456 ~ 504V.

Second, school power supply demand

School power supply needs usually include lighting, teaching equipment, office equipment, air conditioning, elevators and other electrical loads. Most of these loads are civil or light industrial loads, so a voltage class of 115 to 120V is more likely to be used and in the lithium battery.

 

Three, island roof solar power system voltage selection

Voltage level matching:

In view of the school's power supply demand is mainly civilian load, the island's rooftop solar power generation system should choose a voltage level that matches the American civil power system, that is, the 115-120V system.

System design considerations:

When designing the rooftop solar power generation system of the island, it is necessary to ensure that the output voltage of the power generation system matches the voltage level of the existing power system of the school in order to achieve seamless docking and grid-connected power generation.

At the same time, it is also necessary to consider the series and parallel modes of solar cells, as well as the selection and configuration of inverters to ensure that the output voltage and current of the power generation system meet the power supply needs of the school with Battery Energy Storage System.

Safety and Stability:

When using the American standard voltage standard, the relevant safety regulations and operating procedures should be strictly observed to ensure the safe and stable operation of the power generation system.

Regular maintenance and overhaul of the power generation system, timely detection and elimination of potential safety hazards and failures.

Iv. Conclusion

In summary, when the island roof solar power generation system is put into the school power supply, if the US standard voltage is used, the 115 ~ 120V solar system should be selected as the output voltage level of the power generation system. This can not only meet the school's power supply needs, but also ensure the safe and stable operation of the power generation system. At the same time, it is also necessary to rationally design and configure the power generation system according to the specific situation in order to achieve the best power generation effect and economic benefits.