Design And Research Of 10 KW Rural Microgrid

In the world of diminishing resources,environmental pollution aggravation of the situation,the development of new energy power generation has become a hot topic in today's world,especially in remote rural areas,which are rich in wind,light resources,and the development of large power grid costs,which in rural areas The development of microgrids has provided space,and the government has introduced relevant policies to encourage the construction of microgrids over the years.Therefore,the construction and research of rural microgrids are meaningful,and are increasingly valued by all sectors of society.This paper takes a rural household with a load of 10 kW as the background.By analyzing its electricity consumption characteristics,the amount of relevant main components and related design parameters are calculated.The MATLAB simulation software is used to verify the maximum power tracking control of photovoltaic power generation.At the same time,a control scheme for stabilizing the bus voltage was designed for the DC microgrid,and the concept of microgrid dependence was proposed.First of all,this paper takes a typical rural household as the background.Through interviews,calculations and analysis,it is found that the electricity load of an ordinary household is approximately 10 kW,and the load characteristics,power influencing factors and electricity consumption rules in rural areas are analyzed.The calculation of the usage of related components will lay a foundation later.Secondly,in order to ensure the normal operation of the microgrid,energy storage equipment is needed to reduce the dependence of the power grid.In this paper,the battery is used as an energy storage device to discuss the characteristics of the battery and analyze the relevant theoretical knowledge of the battery's working mechanism,charge and discharge characteristics,Clear the design idea and the purpose.Based on the electricity load and electricity characteristics,while meeting the power supply requirements,the battery capacity was calculated as economically as possible.Then,the relevant parameters of the photovoltaic cell,the core component of the microgrid,are designed to comprehensively consider the characteristics of electricity consumption,energy storage equipment,etc.,and reasonably calculate the amount of photovoltaic panels,the number of series and parallel connections;taking into account the radiation efficiency of the photovoltaic panels Impact,so according to the local geographical environment conditions,the inclination and the distance between front and back rows were calculated and analyzed,and the installation was planned reasonably;in order to keep the photovoltaic cells always in a good power generation state,several methods of maximum power tracking control were studied.The working principle of MATLAB is fully discussed in MATLAB simulation,and it is considered comprehensively that the fuzzy control method has higher control accuracy and better smoothness.Next,in order to ensure the stability of the DC bus voltage,the variable droop control is applied to the photovoltaic power generation and battery system.While giving priority to the use of new energy power generation,the control scheme of the coordinated output of photovoltaic power generation and battery charge and discharge is fully utilized to achieve a stable bus voltage effect.Finally,the relationship between the microgrid and the large power grid is discussed comprehensively.It is named after the term microgrid dependence(D).After analysis,it is concluded that everything that conforms to the relationship of 0% ?D(27)100% belongs to the microgrid and can be It is considered that the dependence degree of microgrid is a new method or indicator for evaluating the quality of microgrid and designing microgrid.