The difference between the photovoltaic power station and photovoltaic power generation is analyzed

Solar energy is currently the biggest renewable energy can be developed on the earth. According to the solar radiation energy arriving on earth the transition form is different, the use of solar energy can be divided into two major categories of thermal and photovoltaic (pv). Photovoltaic power generation is to use half a

the solar energy is the largest renewable energy on earth. According to the solar radiation that reaches the earth different forms of energy conversion, the use of solar energy can be divided into two categories: thermal and photovoltaic (pv). Photovoltaic power generation is the use of the photovoltaic effect of semiconductor interface technology converts light energy into electrical energy. A key part of the technology is the solar cell. However, the use of heat and light according to the low temperature can be divided into mild heat utilization. Mainly including solar water heater, solar building heating in low-temperature refrigeration, solar desalination, solar drying. High temperature heat utilization mainly include solar thermal and solar thermal chemistry. At present, the solar thermal power generation technology mainly include four types: groove type, linear Fresnel type, disc type and tower. Among them, the groove and solar thermal power tower have been commercialized, disc type and linear Fresnel type, respectively, in the stage of prototype argumentation and system demonstration. The biggest advantages of photovoltaic applications no obvious limitations, as long as there is sunshine resources, pv systems can be installed. In bad light or during the night, photovoltaic system of storage battery charging and discharging to achieve continuous operation. However, if large photovoltaic power station using battery energy storage, cost is still high, the service life of the battery needs to be tested. In solar thermal utilization, the low density of solar energy in addition to materials to absorb solar radiation spectrum of different wavelengths of light energy transformed into heat energy direct use, can also through the condenser into high density of energy, heating medium, to produce steam to drive a turbine to generate electricity. The condenser focusing method have small focus and line and so on. Several main forms of solar thermal power generation, such as plate type, tower, groove and Fresnel type, are appropriate. Compared with the conventional coal-fired power plants, solar thermal system 'hot - Electric - Electricity conversion link 'adopted by way of thermodynamic cycle and equipment are basically the same. In the case of continuous exposure, solar-thermal plants can be generated directly with alternating current (ac) is identical to that of thermal power plants, meet the quality requirements of grid, to guarantee the stability of the voltage and frequency of the power grid. However, solar radiation energy itself with the seasons and the characteristics of discontinuous change during the day, and much affected by weather conditions. The development of heat storage materials technology make it possible to have large scale and stable operation of the solar thermal power plants. 'In the appropriate location area, has a certain heat storage capacity of solar thermal power plants can not only generate electricity to meet user needs, can also play a role of peak regulation according to the variation of power load in power grid. 'In addition, from the point of view of the actual plant operation, solar thermal power generation than the solar photovoltaic power generation has better compatibility with existing thermal power plants and power grid system. However, compared with photovoltaic power generation, its claim to the solar radiation resources is higher, need large capacity to reflect solar thermal efficiency.