"Power rationing" is a term with a sense of time, but recently it has returned to the public eye. With the arrival of the hot season, last year the national electricity load and daily average power generation both exceeded the peak of last summer, and the electricity consumption also set a historical record. Fifteen regions have also issued staggered and orderly electricity usage notices, gradually beginning "power rationing". Since the outbreak of the epidemic, a large number of international orders have been transferred to China, driving the entire manufacturing capacity in China to operate at full speed. The current contradiction between power supply and demand, as well as the contradiction between development and emissions, is stacked layer by layer, resulting in a large gap in industrial electricity consumption, which will also force enterprises to adjust their industrial structure. At present, many enterprises have begun to implement "self rescue" and actively seek more types of power generation solutions, such as smart grids, energy storage, distributed energy, etc., using green and efficient energy to solve supply-demand conflicts and ensure environmental security.

The other side of the nationwide electricity supply shortage is the market environment where domestic thermal coal prices continue to rise. At present, thermal power generation remains the main source of electricity in China. This energy structure not only relies heavily on fossil fuels such as coal, but also easily leads to power shortages and shortages in the face of energy price fluctuations, making it difficult to ensure national energy security and hindering the implementation of China's carbon neutrality plan.

The combination of photovoltaic and energy storage systems can to some extent solve the current power limitation problem. The photovoltaic power generation system converts sunlight into electricity through solar photovoltaic panels, which has the characteristics of clean and renewable. However, the power generation of photovoltaic power generation systems is affected by factors such as weather and light, so the power generation capacity will weaken under night or low light conditions, which may lead to problems such as insufficient power supply and power restrictions.

Introducing energy storage systems can solve the intermittency and instability of photovoltaic power generation systems, improve the utilization rate and flexibility of electricity. Energy storage systems can store excess electricity generated by photovoltaic systems during the day, and then release the stored energy at night or under low light conditions to meet electricity demand, thereby reducing dependence on the power grid, improving power supply reliability, and alleviating power rationing problems.

In addition, photovoltaic+energy storage systems can also be combined with intelligent energy management systems to optimize scheduling and coordinate control of photovoltaic power generation, energy storage, and the power grid, achieving optimal energy utilization and distribution, further improving system efficiency and stability. For example, based on weather forecasts and electricity demand, the charging and discharging methods of energy storage systems can be intelligently controlled to maximize the potential of photovoltaic power generation and energy storage systems, providing sustained and stable electricity supply.

The combination of photovoltaic and energy storage system can to some extent solve the current power rationing problem, improve the reliability and stability of power supply, and achieve efficient utilization of clean energy. However, in order to comprehensively solve the problem of power rationing, it is necessary to comprehensively consider various factors such as energy policies, technological innovation, and power system planning, and adopt comprehensive measures and policies to promote the development and application of clean energy and energy storage technologies. At the same time, it is necessary to strengthen research and investment in photovoltaic+energy storage systems to improve their performance and reliability, in order to meet the growing demand for electricity and maximize the achievement of sustainable development goals.