The Study Of Inverter Based On Distributed System Of Wind And Solar In DC Microgrid

The development and utilization of new energy is the most important aspects ofdevelopment and progress of human society.The energy crisisand environmental issueshas become particularly prominent in recent years. Wind and solar have bettercomplementarity in time and space.They are environmentally friendly energy. The hybridpower system of wind and solar can maximize the use of wind and solar to reduce systempower costs,so that the system can run stability, easy maintenance and be long-lived. Atthe same time,drawbacks and limitations of ultra-large-scale power system is becomingincreasingly apparent.The grid’s vulnerability has been fully exposed.So the distributedgeneration technologies based on renewable energy has been a rapid development. Avariety of renewable energy generation in micro-grid and users’ new load needs to betransformed through the power electronics interface.The form of DC will save power totransform the intermediate links and improve utilization efficiency of equipment,.It canreduce the degree of coupling between the micro-grid and AC system through the DCsystem.It also reduce the impact of the AC fault on the micro-grid. Therefore, the DCform of micro-network can avoid AC short-circuit too large and stability of load. It willimprove power quality and make the distribution network run more economical, flexibleand reliable.In this paper, I use the stable operation of the DC micro-grid as a starting point andanalysis the basic structure of the DC micro-grid. This paper study the design and theconstant pressure control of the DC chopper circuit based on the structure of the auxiliarysupport capacitance.This paper also establish some models of micro power just like thesolar power, wind power and analysis control methods and operating characteristics ofenergy storage devices (batteries and the super capacitor) in the island mode. It gives thecontrol module block diagram of the various components of the DC micro-grid throughthe described of the DC micro-grid energy management methods. This paper propose anew control method based on the multi-agent of DC micro-grid. This study has a strongforward-looking in the DC micro-network applications and some guidance for futureexploration. Finally, I debug the wind and solar inverter control experiment and theexperimental results indicate that this study the development of wind and solar invertercan make the DC microgrid achieve stable operation.