Photovoltaic Off-grid System: A Reliable Power Supply Solution for Emergency Command Centers

In today's era of frequent natural disasters, the power supply for emergency command centers is of vital importance. Recently, the photovoltaic power generation system of Hetian New Energy has been successfully put into operation at the emergency command center of Anyang Seismological Bureau. This system adopts a combined on-grid and off-grid mode, designed with a priority to the city power supply, ensuring continuous and reliable power support for the emergency command center under any circumstances.

This system makes full use of the roof area to install solar panels, achieving self-consumption and surplus power feeding to the grid during normal times, enjoying the national electricity subsidy policy. When natural disasters cause power grid failures, the system can automatically switch to solar power supply, and the battery array can provide 48 hours of uninterrupted power supply, ensuring the normal operation of key equipment in the command center.

The photovoltaic off-grid system of the Anyang Seismological Bureau's emergency command center showcases many innovative design features. The system adopts a combined on-grid and off-grid mode, achieving seamless switching between city power and solar power supply.

In terms of power supply strategy, the system is designed with a priority to city power, maximizing the utilization of existing grid resources while ensuring autonomous power supply capabilities in emergencies.

This design concept is highly consistent with the spirit of the "Guiding Opinions on Promoting the Integrated and Integrated Development of New Energy" recently issued by the National Energy Administration, which explicitly proposes to promote the integrated development of distributed new energy in multiple fields.

The system makes full use of the roof area of the command center to scientifically install solar panels, forming an efficient photovoltaic array. Under normal conditions, the solar panels generate electricity for self-consumption and surplus power is fed to the grid, reducing operating costs and enjoying the national electricity subsidy policy.

The capacity of the battery array in the system has been precisely calculated to provide 48 hours of uninterrupted power supply, sufficient to cope with most power grid disruptions caused by natural disasters.

As a key component of the off-grid system, the capacity design of the battery directly affects the system's endurance. In off-grid photovoltaic systems, the basic requirements for batteries include: low self-discharge rate, long cycle life, strong deep cycle discharge capacity, high charging efficiency, and low or no maintenance.