Wind power and photovoltaic power generation are "garbage power"?

Two power generation principles

Wind power converts wind energy into mechanical energy, and then mechanical energy into electrical energy. The large windmill used in general wind power generation is equipped with three impellers. After the wind blows the impeller, the rotation of the impeller drives the generator to rotate, and the generator rotates to generate electric energy. Finally, the electric energy is sent to the power grid through the booster system for public use.

Photovoltaic power stations use solar panels to collect solar energy and convert solar energy into electric energy. Photovoltaic power generation mainly uses "photovoltaic effect". In short, "photovoltaic effect" refers to the phenomenon that an object generates electromotive force due to the absorption of photons. When the object is illuminated, the distribution state of charge in the object will change, resulting in electromotive force and electric energy. In the photovoltaic power station, after the solar panel is irradiated by sunlight, the PN junction in the photovoltaic cell (p-type semiconductor and n-type semiconductor are made on the same semiconductor substrate through different doping processes, and the space charge region is formed at their interface, which is called PN junction) generates the flow of electrons, When the flowing charge is collected, electricity is generated.

Both wind power generation and photovoltaic power generation have volatility. Wind power generation will be affected by wind, wind speed and other factors; The photovoltaic power station can not work at night, lack of sunlight, and can not produce photovoltaic effect. Some people therefore believe that wind power and photovoltaic power generation are "garbage power".

Although both have their own weaknesses, Liu Jianping, deputy general manager of Fujian Company of Three Gorges group, does not recognize that wind power and photovoltaic power generation are "garbage power". He said that compared with traditional power generation methods, wind power generation and photovoltaic power generation are more environmentally friendly, and we can equip wind power stations and photovoltaic power stations with energy storage facilities to make new energy power generation more stable.