Wind and photovoltaic power have obvious seasonality and volatility, and increasing the proportion of wind and photovoltaic power generation will affect the stability of the power system.
Wind power generation relies primarily on wind energy, a natural energy source. Since wind speed in different regions is closely linked to climate change, wind energy supply also exhibits significant seasonality. For example, during active monsoon periods such as winter or spring, available wind resources will be more abundant; while in summer or other dry and less rainy environments, factors such as sandstorms can affect the availability of wind resources.
At the same time, some specific geographic locations (such as mountains) also have certain requirementsin terms of wind stability. This means that at different times electricity production will increase and decrease. Although modern technology can smooth out these fluctuations by storing excess electricity, there are still some technical challenges and limitations. ?
Solar photovoltaic (PV) systems, on the other hand, work by converting light into electricity. However, the intensity of sunlight also changes depending on weather conditions, including cloud cover, daylight hours, and intensity of UV radiation. This will affect the efficiency of photoelectric conversion, thereby further affecting the stability of output power.
The principle of wind energy production
The devices required for wind energy production are called wind turbines. This type of wind turbine can be roughly divided into three parts: the wind wheel (including the gtail rudder), generator and tower.
The wind wheel is an important element that converts the kinetic energy of the wind into mechanical energy. It is made up of several blades. When the wind blows toward the blades, an aerodynamic force is generated on the blades to rotate the wind wheel. The blade material requires high strength and light weight and is often made of fiberglass or other composite materials.
The iron tower is the structure that supports the wind wheel, rudder and generator. It is usually built relatively high in order to obtain a greater and more uniform wind force and to have sufficient force. The height of the tower depends on the impact of ground obstacles on wind speed and the diameter of the wind wheel. It is generally between 6 and 20 meters.
The function of the generator is to transfer the constant rotation speed obtained from the wheelwind turbine to the power generation mechanism through increased speed for uniform operation, thereby converting mechanical energy into electrical energy.
Why is photovoltaics developing better than solar thermal, wind power, etc.
Photovoltaics.
In daily life, there are many photovoltaic application scenarios. For example, rural photovoltaics on roofs, or photovoltaics complementary to fishing lamps, or roadside street lamps equipped with solar panels, etc. The size of photovoltaic power generation panels can be changed according to different application scenarios. We can say that the photovoltaic application scenarios are the most extensive. When it comes to wind power generation, the most common are huge wind turbines installed in fields.
Compared to solar thermal, why wind power, photovoltaic, etc. do they develop better?
Photothermal covers a large area, requires a lot of water, has low flexibility but is relatively stable. It basically collects hot water to boil it and the steam turbine operates.
Photovoltaics generate electrical energy through the photoelectric effect and offer the greatest flexibility.
Wind energy is the conversion of potential energy into mechanical energy to produce electricity. Compared with light, wind energy has higher conversion efficiency and higher income.
Generally speaking, the cost of solar thermal is still too high and the land area is too large to overcome water constraints. It is not economically feasible to build in an area where water is scarce in the northwest, and there is no shortage of electricity in the northwest. Built in a coastal area ofdeveloped, the cost of each inch of land is too high to be justified.
Restrictions on photovoltaic and wind energy are much lower. Although photovoltaic power generation hours are low, rooftop fish ponds and the like can be deployed as long as there are no obstructions. Although the wind farm is large in area, except for the small space occupied by the wind turbine foundation and the booster station, it is enough to leave a road for maintenance in other places.