Movable Solar Power System Photovoltaic Effect
Movable Solar Power System in the use of modern society more and more widely, then, how is the sun into electrical energy?
The main principle of solar power generation is based on the photovoltaic effect, issued by the solar components of direct current. If it is the grid system through the grid inverter directly into the power grid; if it is off-grid system through the solar controller to the battery and load charge and discharge.
A beam of light on the semiconductor and on the metal or insulator on the effect is very different. As the free electrons in the metal so much, so that the light caused by changes in the conductivity is completely negligible. Insulators at high temperatures still can not stimulate more electrons to participate in conduction. And the conductivity between the metal and the insulator between the semiconductor on the body of the electron binding force is much smaller than the insulator, visible light photon energy can be excited from the bound to the free conductive state, which is the semiconductor photoelectric effect. When there is an electric field in the local area of the semiconductor, the photogenerated carriers will accumulate, and there is no difference between the electric field and the electric field, and the photoelectric voltage will be generated on both sides of the electric field due to the charge accumulation. This is the photovoltaic effect.
There are two types of solar power generation: one is solar power (also known as solar photovoltaic), the other is solar thermal power generation (also known as solar thermal power generation). Solar photovoltaic power generation is a direct conversion of Movable Solar Power System into a power generation. It includes photovoltaic power generation, photochemical power generation, light induction power generation and photoelectric power generation in four forms, in the photochemical power generation in the electrochemical photovoltaic cells, photocells and photocatalytic batteries.
Solar thermal power generation is the first Movable Solar Power System into heat, and then heat into electricity, it has two conversion methods. One is the solar thermal energy directly into electrical energy, such as semiconductor or metal materials, thermoelectric power generation, vacuum devices in the thermoelectric and thermal ion power generation, alkali metal thermoelectric conversion, and magnetic fluid power generation. Another way is to heat the sun through the heat engine (such as steam turbine) to drive generators, similar to conventional thermal power generation, but its heat is not from the fuel, but from Movable Solar Power System.
Solar thermal power because of its technical specificity, the general scale is relatively large, in the construction of the construction of the difficulty is higher, and easily lead to light pollution, so we are not in this discussion. Solar photovoltaic power generation to adapt to all sizes of power generation system, is our general choice for Movable Solar Power System applications.
Power generation system is the solar module produced by the DC power through the grid inverter into the AC power grid in accordance with the requirements of the direct access to public power grid. Grid-connected power generation systems are centralized large-scale grid-connected power plants are generally state-level power plants, the main feature is the power generation can be directly transported to the grid, the unified allocation of power to the user power supply. But this power plant investment, construction period is long, covers an area of large, not much development. The decentralized small-scale grid-connected power generation system, especially the integrated photovoltaic power generation system, is the mainstream of grid-connected power generation due to its small investment, fast construction, small footprint and strong policy support.