What is the difference between photovoltaic power generation and general power generation ratio?

Photovoltaic power generation has more advantages than traditional power generation technology: 1. Solar energy resources are very rich, and the energy radiated to the earth's surface is huge, which is very beneficial to the utilization of solar energy. Therefore, solar photovoltaic power generation technology is a kind of power generation technology with rich resources. 2。 Solar photovoltaic power generation is safer and more reliable, will not produce pollution and noise, can be more flexible, and can run safely and stably.

3。 The application of photovoltaic power generation can effectively solve the problem of electricity consumption in remote and special areas, and solar energy resources can be used anytime and anywhere.

4。 Photovoltaic power generation can be combined with buildings to form an integrated photovoltaic building system and reduce the waste of land resources.

Advantages of photothermal power generation

1, excellent power quality, direct barrier-free grid connection. The principle of solar photothermal power generation and conventional fossil energy in thermal power generation is the same. It converts heat energy into electric energy through Rankine cycle, Brayton cycle or Stirling cycle, and directly outputs alternating current, without inverter conversion like photovoltaic or wind power. The transmission technology is relatively mature, with high stability, convenient connection with the current domestic power grid and good power quality.

2. It can store energy and peak load, and realize continuous power generation.

The load curve of the power grid is similar to the natural curve of solar power generation during the day. The load increases with time in the morning and decreases in the afternoon. Therefore, solar power generation is the natural peak load of power grid, and the load ratio can be determined according to the maximum load difference between day and night, which can generally account for 10-20%.

Benefiting from the easy storage of heat energy, all solar thermal power stations have a certain degree of peak-shaving scheduling ability, that is, power generation can be buffered and smoothed through heat conversion, which can cope with the short-term instability of solar energy;

Energy storage is the bottleneck of renewable energy development. Practice has proved that the efficiency and economy of thermal storage are obviously better than that of electric storage and pumped storage. The solar photothermal power station equipped with special heat storage device can not only replenish energy when it is started and partly cloudy, but also ensure the stable operation of the unit, and even realize uninterrupted power generation after sunset for 24 hours. At the same time, the power peak-shaving scheduling can be carried out according to the load and power grid demand.

3. The cost advantage is outstanding under the scale effect.

Because the thermoelectric conversion link is the same as thermal power, solar photothermal power generation also has significant scale effect like thermal power, which is superior to wind power and photovoltaic. With the technological progress and industrial scale expansion, the cost of solar thermal power generation will soon be close to or even lower than that of traditional fossil energy generation.

4, clean and pollution-free, helping carbon emission reduction.

Although photovoltaic power generation is clean, the silicon wafer production process consumes high energy and pollutes greatly, while solar photothermal power generation does not need to extract heavy metals, rare metals and silicon, and the production and power generation process is pollution-free, so it is a real clean energy source.