Design On Distributed Photovoltaic Power Generation Connect To The Grid

In the process of global industrialization, with the increasingly tense energy and urban air pollution problems, improving energy efficiency, developing clean energy get more and more attention in the world. And distributed photovoltaic power generation get more and more attention in the market of academic and industry at home and abroad, because of its features such as pollutant zero emissions, energy of abundant reserves, and wide prospect.Distributed generation is a small or medium power equipment which installed near the user side. its installed capacity between thousand to tens of megawatts. This kind of technology can greatly improve the reliability and stability of power grid. At the same time also can bring a certain degree of influence.This paper takes a photovoltaic engineering practice as an example, introduces the general situation of the engineering, photovoltaic power generation installed capacity, technical points, the system constitution and the relevant principles, and the main components and performance parameters.This paper studied the relevant regulation and technical standard about the access system for distributed power supply. it introduces the distributed power grid connected mode, combined with the actual situation of power grid. it analyses the requirements of distributed photovoltaic power generation system from the aspect of photovoltaic grid connected and relay protection, and introduces the corresponding relay protection scheme.At last, this paper analysis the energy efficiency of photovoltaic power generation access system, through the upper operation and maintenance, and make a comprehensive benefit evaluation.