Distributed Photovoltaic Access Planning In Shantou And The Influence Of Its Grid Connection On The System

With the increasing depletion of the earth’s resources,especially the fossil fuel energy,low energy efficiency and environmental protection issues,the demand for new energy generation is growing.A method of regional distribution network access to renewable energy for power production has been applied,which called distributed power supply mode.This model has the characteristics of small investment scale,high efficiency and sustainable resource utilization,which can improve the drawbacks of traditional fuel type and centralized power generation.It have broad prospects for development.The new power grid construction with distributed generation will be the inevitable trend of future power system development.On the other hand,due to the volatility,intermittence and uncontrollable characteristics of distributed energy such as wind power and pv,the integrated distribution network will bring about all aspects of daily operation and planning.This paper first introduces the research background and research significance of the subject,and briefly summarizes the development of distributed generation at home and abroad。Introduces distributed photovoltaic power generation system and its basic principle,Through Shantou power grid structure and electricity load,expounds the grid connected access mode and planning scheme of different distributed generation.Analysis of different distributed power access mode technical characteristics,scope and advantages and disadvantages.Combined with the Shantou Huaneng distributed photovoltaic power generation project access to the grid to conduct case studies,The effects of distributed PV grid connection on system operation and grid regulation are analyzed and discussed(such as Power flow distribution,power quality,relay protection and reliability).Finally,put forward some relevant strategies and suggestions.