Solar photovoltaic power generation system structure and working principle

The solar cell is a key part of photovoltaic power generation systems, including silicon solar cell ( Monocrystalline silicon, polycrystalline silicon, amorphous silicon battery) And the silicon solar cells, etc. In crystalline silicon solar cells on the industrial chain of the preparation and distribution of the silicon wafer production, electricity

solar cells are key components of photovoltaic power generation systems, including silicon solar cells, Monocrystalline silicon, polycrystalline silicon, amorphous silicon battery) And the silicon solar cells. In the industry chain of crystalline silicon solar cells, there are four links: preparation of crystalline silicon, silicon wafer production, battery manufacturing and component encapsulation. Photovoltaic power generation system is mainly composed of solar battery, storage battery, controller and inverter. Photovoltaic power generation system can be divided into independent solar photovoltaic systems and grid photovoltaic system: independent solar photovoltaic power generation refers to the solar photovoltaic power generation is not connected to the electricity grid generation, its typical characteristic is need battery energy storage, is mainly used in remote villages within the scope of civil; Grid photovoltaic power generation refers to the solar photovoltaic power generation connected to the national grid become supplementary way of generating power grid. A basic set of solar power system components: ( a) Solar panel: solar panel is the core part of solar power generation system, also is the most valuable part of the solar system. Its function is to convert the sun's radiation ability into electrical energy, or store it into the battery, or promote work load. ( 2) Solar controller: solar controller's function is to control the working state of the whole system, prevent the battery overcharge and over discharge. In difference in temperature big place, qualified controller should also has temperature compensation function. ( 3) Battery: its function is when there is light store electric energy from solar panels, and released when needed. Normally lead-acid battery, nickel metal hydride batteries, nickel-cadmium batteries or lithium batteries can also be used for small and micro system. ( 4) Inverter: in many cases, the need to provide 220 v alternating current (ac) and 110 v alternating current. Due to the direct output of solar energy is commonly 12 VDC and 24 VDC and 48 VDC. Photovoltaic technology, the basic principle of photovoltaic effect: when the light on the semiconductor material, different parts of the semiconductor materials can produce electric potential difference. This phenomenon is referred to as 'photovoltaic effect'. When the light on the object, the object to change the conductivity of the phenomenon known as photoconductive effect, objects produce raw electromotive force phenomenon known as light born v effect, photoconductive effect and light born v effect occurred inside the object, collectively known as the photoelectric effect. The working principle of solar photovoltaic power generation; ( 1) When the sun ( Or other light) On the solar battery, the battery absorb light energy and electronic empty holes to produce light. ( 2) Built-in electric field under the action of the battery and, optoelectronics and empty hole separation, different on both ends of the battery charge accumulation, produce 'pv voltage', namely 'photovoltaic effect'. ( 3) When the electrode from the both sides of the built-in electric field and connected to the load, there will be a 'light' current through the load, the power output is achieved. The working principle of solar cells convert light energy into electrical energy can be summarized as three process. First of all, the solar cells absorb a certain energy photons, - electrons in the semiconductor Empty hole pair, this is known as a 'carrier'. Instead of the electrical properties of both. Electronic negatively charged, and the empty hole positively charged.