The production of reliable photovoltaic energy is a new energy project strongly supported and promoted by the State. Like wind energy production, certain financial compensation is provided, mainly for large-scale projects. It is also a promotion project with large investment and slow results, saving power generation resources.
Photovoltaic power generation involves letting photons shine on the metal, then absorbing the energy through the metal and converting it into solar cells. Solar energy is currently an inexhaustible, clean, reliable and usable renewable energy source for a long time.
Future Trends
Solar photovoltaic power generation will occupy an important place in global energy consumption in the near future. It will not only replace certain conventional energy sources, butwill also become the main source of energy. of global energy supply. It is expected that by 2030, renewable energy will account for more than 30% of the total energy structure, and solar photovoltaic power generation will account for more than 10% of the world's total electricity supply.
By 2040, renewable energy will account for more than 50% of total energy consumption, and solar photovoltaic power generation will account for more than 20% of total electricity by end of the 21st century, renewable energies; will represent 50% of the energy structure. More than 80%, solar power generation will account for more than 60%. These figures are enough to show the development prospects of the solar photovoltaic industry and its important strategic position in the energy field.
Wind and photovoltaic energy are new sources of energy thatChina strives to develop. The electricity network must fully absorb them and prioritize their use. Hydroelectricity also requires priority use of the electricity network during periods of flooding. This is a comprehensive consideration of a series of factors such as environmental protection and the reduction of carbon emissions by the State. The electricity network can therefore do nothing! Why is it called “junk electricity”? There are mainly two aspects.
First, photovoltaic and wind power have low installed capacity and are scattered, making it difficult to meet the peak load regulation needs of the power grid! To put it simply, when the weather is sunny and the wind is blowing, the insufficient thermal power will be supplemented. When short-term electricity demand increases rapidly, photovoltaic and wind power cannot satisfy itarea. On cloudy days and when there is no wind, the power plant is dead. In the event of an electricity shortage, thermal energy is used! And the price of new energy electricity connected to the network is relatively high! This means that when the sun rises, the heat load decreases and when the sun sets, the heat load increases. For the power grid, constant adjustments are required, which is not conducive to the safety and economical operation of the power grid. Secondly, wind and photovoltaic power are not stable enough, resulting in the transmission of harmonics to the power grid system, which will increase power losses and affect motor efficiency, which will affect the manufacturing of high precision ! These two reasons should be the reason why photovoltaic and wind energy are called "trash energy".
Both are newsenergy productions, which are currently encouraged and vigorously developed by the state, and there are huge state subsidies. , the grid settlement price for thermal power is about 0.3 yuan per kilowatt hour, and the price of wind and photovoltaic power generation ranges from 0.3 to 0.8 yuan.
Both types of electricity generation had a fatal flaw at the time, namely their intermittency. Solar power produced electricity during the day and could not produce electricity at night. Wind power could produce electricity when it was windy. but could not produce electricity when there was no wind. These two types of power generation are actually not well received by the power grid, but due to state support for new energy and requirements for energy saving and emission reduction, the electricity network companyEU must accept them unconditionally.
These two types of electricity production are currently becoming more and more widespread. The more electricity there is, the more unstable the electricity network will be. At present, we mainly rely on thermal power peak shaving, pumped energy storage, wind energy heating and the construction of energy storage plants to solve intermittent problems. . . At the same time, wind and solar energy forecasts are becoming increasingly accurate, which also reduces pressure on electricity grid regulation.