The rising problems of energy shortage,energy security,rapid growth of energy prices and environmental pollution have become a major factor restricting the development of many areas of society,the energy application and development around the world is facing a huge crisis.To solve this series of problems,the application of green energy is one of the important means.The use of green energy,on the one hand can effectively alleviate the energy shortage and the use of traditional ore fuel polluting on the environment,on the other hand can also promote the local economic development. Centralized solar power generation is one of the important applications of green energy.Solar power grid-connected generation system mainly consists of solar power modules,combiner boxes,inverters,grid-connected systems and other equipments.