Research On Urban Residential PV-DC Micro Grid System Design

Facing the situation of serious energy lack in our country,it is high time to reducing energy consumption by taking advantage of renewable sources in city.Distributed solar photovoltaic(PV)power generation system is an optimal way to utilizing renewable sources.But it is not widely used,in the result of the limited and dispersed PV integrated area,the instability of grid-connected PV converting.Besides,PV generation is susceptible to sun orientation and shadow shelter.With the increasing of high-rise apartments in urban,it is necessary to consider building layout and orientation during early planning work,and to raise the possibility of solar energy utilization.In order to raise the possibility of solar energy utilization and solve the problem of urban residential integrating PV system,the research constructed PV-DC micro grid system well applied in urban residential area by maximizing integrated PV modules to apartments,public and road facilities and scattered area in residential areas.The main works of the research are as followed.Firstly,established theory of PV-DC micro grid system and listed three parts of the system,namely PV generator,residential DC micro grid,and household DC loads.Secondly,proposed an effective method of designing PV generator in resident,which helping urban planners and architects raising the possibility of solar energy utilization during early planning work.Thirdly,disused the major components of residential DC micro grid and household DC loads.Fourthly,PV-DC micro grid system feasibility and effects are proven by a case study of Wuxiang resident.The research innovatively introduces theory of PV-DC micro grid system and proposed an effective method of designing PV generator in resident.It is proved that the system is effective in utilizing PV energy and raising security of power supply with less investment,comparing to traditional grid connected distributed PV power system.It is significance in achieving the purpose of "local PV generation,local DC consumption" in urban residential area and improving the utilization of renewable energy.