Simulated solar street light global solar design 5 kw small solar light

Solar energy as a new type of renewable energy, has the characteristics of widely distributed, large reserves, no pollution, thus became a kind of the most use of future energy. Photovoltaic (pv) grid power generation technology is an important technology USES solar photovoltaic, it not only has

solar energy as a new type of renewable energy, has the characteristics of wide distribution, large reserves, no pollution, thus become the most promising energy. Photovoltaic (pv) grid power generation technology is an important technology solar photovoltaic utilization. It not only has the advantages of safe, reliable, no noise, no pollution. , also helps to save energy, reduce emissions, save valuable land resources, reduce environmental pollution, improve the ecological environment, and reduce the pressure on the current electricity. Therefore, solar energy grid generation technique has been widely used in many countries. A brief introduction 1, photovoltaic (pv) grid power generation system. Photovoltaic (pv) grid power system working principle and operation mode of the solar photovoltaic (pv) grid power generation system using the photoelectric effect and photoelectric conversion device ( The solar cell) Can convert solar energy into direct current. By the effect of inverter, match the local power grid ac instead of dc, for the use of ac load, the rest of the feedback to the electricity grid. The running mode of photovoltaic power generation systems including parallel operation and run away from the net. From the network operation system is mainly used for remote areas without electricity, and are mostly small and medium-sized system. Compared with off-grid system, grid generation system has its own advantages: don't need to battery, redundant electrical energy stored in the grid directly, greatly reduces the cost, avoid the use of battery bring secondary pollution; Photovoltaic modules can be used as a building and decoration materials, to achieve the perfect combination of architecture and to reduce the construction cost, has the good economic efficiency. Power generation does not produce greenhouse gases and pollutants in the process, to protect the ecological environment, has the good ecological effect. 2. Photovoltaic (pv) grid power generation system of photovoltaic (pv) grid power generation system is mainly composed of two parts: solar energy battery components and grid inverter. Photovoltaic cell is the basic unit of the system. Single battery voltage is very low, not enough to meet the actual needs. As a result, several cells need series and parallel work together, to form a pv module. At present, there are many kinds of photovoltaic cells, according to different materials, can be divided into silicon, silicon cells and thin film cells. Conversion efficiency of solar cells is an important index of the solar cell performance evaluation. Monocrystalline silicon cell conversion efficiency reached 188%, polycrystalline silicon battery conversion efficiency reached 186%. Crystalline silicon thin film is still at the development stage, has not yet entered the stage of industrialization. Grid inverter is one of the core parts of photovoltaic system. Its function is a photovoltaic array will provide low voltage direct current (dc) into the same as the grid frequency and phase alternating current (ac), for the use of ac load and the user. Inverter needs to have stable output voltage, output enough capacity, high efficiency, low noise, inverter overvoltage and overcurrent protection. In order to make full use of solar energy, the inverter also need to prevent island effect, and automatically adjust the voltage of maximum power point tracking function. How to reduce the energy losses in the inverter is in use process, how to improve the capacity of inverter, how to reduce the cost of photovoltaic power generation, has become a research focus in the photovoltaic industry. The second: 5 kw photovoltaic (pv) grid power generation system design 1. The design principles, 1) Compared with off-grid system, this design USES the grid solar photovoltaic systems, because they use safe and reliable, and the power grid load effects. ( 2) Using low voltage grid system, does not use batteries, simple structure, low power consumption, very suitable for ordinary residential and office buildings, saves the use of the power cord, easy to maintain.