Analysis And Application Of Grid-connected Distributed Photovoltaic Power Generation To Distribution Network

With the rapid development and progress of society,the increasing demand of human beings for electricity has caused extremely serious pollution to the natural environment.Developing and utilizing renewable new energy is an important way to solve the shortage of traditional resources and environmental degradation in China.By making full use of solar energy resources,excess electric energy can be transmitted to areas with large demand for electricity.Therefore,in this paper,the impact of photovoltaic power supply on the whole power grid and enterprises were analyzed in Xinmin area,which has certain significance for the development of distributed photovoltaic grid connection,the promotion of economic benefits of enterprises and the improvement of natural environment.First of all,the research status of photovoltaic grid connection were intouduced.Secondly,the current situation of regional photovoltaic power generation were introduced,expounds the principle and system structure of distributed photovoltaic power generation,and the preliminary investment and income of photovoltaic power generation projects were analyzed.Secondly,the influence of distributed photovoltaic power generation access on the voltage of distribution network were analyzed.Due to the instability of photovoltaic power generation and the instability factors on the power grid after the photovoltaic power supply is connected to the power grid,the stability of the power grid operation may be greatly affected.Through the typical access mode of distribution network model,the voltage influence of photovoltaic grid access on distribution network was analyzed.Finally,the influence of distributed generation on power grid loss and relay protection of distribution network were analyzed.Through the above model and algorithm,the influence of different distributed photovoltaic power generation on relay protection after connecting to Xinmin power grid was analyzed.At last,the author summarizes this paper and looks forward to the situation of photovoltaic power generation in Xinmin region and at home and abroad.