Research On Influence Of Grid-connected Photovoltaic Power Supply On Distribution Of Distribution Network Voltage And Loss

Today,with power energy as one of the main energy sources,the power industry in countries around the world is facing huge challenges.The pressure mainly comes from the sharp increase in power load,while the development of power network updates is slow and cannot meet the increase in power demand.In addition,environmental issues and power quality issues have also drawn increasing attention.Through repeated research and a large number of application practices,it has been concluded that distributed power generation can comprehensively utilize a variety of energy forms,and can make outstanding contributions in protecting the environment.In recent years,the emergence of the concept of "smart grid" has set off a new wave of development in distributed energy and renewable energy.Therefore,it is of great practical need to study the changes of various electrical parameters and the impact of power equipment on the distribution network after the photovoltaic system is connected,and find appropriate and efficient solutions according to the corresponding impacts.This article first analyzes the working principle and output characteristics of photovoltaic cells,aiming at the effects of light intensity and temperature on the output Power,use of MPPT(Maximum Power Point Tracking)technique improves the output efficiency of photovoltaic cells,and photovoltaic cells based on the Matlab/Simulink simulation model and the model of grid-connected photovoltaic(pv),light intensity and temperature is analyzed the specific influence to the output Power,the parameters of the photovoltaic cells,the specific distribution network Settings.Secondly,the influence of photovoltaic power on voltage distribution is studied.When photovoltaic power supply connected to the power distribution network,by showing two different types of distribution network steady state voltage distribution model,for single photovoltaic(pv)power and multiple access photovoltaic power supply distribution network after detailed analysis,and respectively from the access to the location,access to these three aspects research capacity and power factor photovoltaic(pv)power supply after the access to the distribution network to the impact of the voltage distribution,it is concluded that the corresponding laws,and probes into the distributed photovoltaic power grid,the countermeasures against the influence of distribution network voltage provides the regulating transformer change ratio and change access to the location and the voltage of photovoltaic(pv)power supply overall adjustment strategy three regulation scheme,and applied to simulation of actual case studies.Finally,the ideal distribution network model is used for simulation analysis.According to the three factors of different access locations,different access capacities and different operation modes of photovoltaic grid-connected power generation system,the network loss caused by photovoltaic power generation system to the distribution network is studied,and the corresponding influence rules are obtained.