These are currently the most environmentally friendly electricity production methods in the world.
Relatively speaking, wind power is even more superior.
Solar power generation (photovoltaic power generation) requires a large amount of land. An installed capacity of 10,000 kilowatts requires 350 acres of land (1 acre, 667 square meters), and it is densely developed, so the land cannot be cultivated.
A 2,000 kilowatt wind unit only occupies 4*4M, or 16 square meters. Planting, grazing, etc. can still be carried out around the wind turbine.
Wind power and photovoltaics are new energy sources that China is working 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. 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 meet it. On cloudy days and when there is no wind, the power plant is dead. In the event of a power outage, thermal energy is used! And the price of new electricity on the network is relatively high! That meansthat 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 power and wind power are called "waste energy".
Both are new energy sources, which are currently being promoted 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 priceof wind and photovoltaic power production 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 it would not be able to produce electricity in the absence of 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 company must accept them unconditionally.
There are more and more of these two types of electricity production, which lead to instability in the electricity network. Currently we rely primarily on peak shavings thermal energy, pumped energy storage, wind energy heating and wind energy heating. building energy storage power plants to solve intermittent problems. At the same time, wind and solar energy forecasts are becoming more accurate, which also reduces pressure on electricity grid regulation.