Planning And Design Of Rural Power Grid Considering Coal To Power Demand And Distributed Generation Access

In recent years,with the rapid development of economy,China has suffered from a wide range of haze weather,which has brought great troubles to people’s life.In most rural areas in North China,loose coal is used for heating,which is one of the important reasons for frequent winter haze and other weather events.In order to reduce air pollution caused by coal burning,the state started to implement the project of "replacing coal with electricity".With the advancement of the project of "replacing coal with electricity",high-power electric heating equipment has entered more and more rural families,resulting in many problems,such as large power consumption of electric heating equipment,high heating cost of users,and the rural low-voltage distribution network no longer meeting the power supply demand.Therefore,it is of great significance to explore the clean heating mode suitable for rural areas and carry out the renovation and expansion planning of low-voltage distribution network in the project of "coal-to-electricity" in a scientific and reasonable way.In this paper,a village in North China was selected as the research object.First,a typical household building model was built by using Energy Plus software,and the winter heating Energy consumption demand of the village was simulated.Select heating characteristics and Coefficient of Performance higher air source heat pump as "coal to electricity engineering heating equipment,consider the rural typical family hollow air source heat pump under different heating strategy,its initial investment cost,operating cost of heating equipment,annual maintenance cost is different,the residents heating renovation in values such as cost analysis.Secondly,on the premise of meet the demand of residents in winter heating energy consumption of the different methods of residents for heating choice,at this point,the low voltage power distribution network capacity of different needs,thus established the meter and the residents "coal to electricity" project transformation and distribution network construction and planning the whole year of values such as life cycle cost optimization model,the heating method,the location of the distribution transformer constant volume,area selection,selection of distribution line as optimization variables,using particle swarm optimization algorithm for solving the model.Finally,on this basis,in order to improve the utilization of energy,in this paper,the distributed photovoltaic(pv)and air source heat pump heating heat storage system coupling,and put forward the high pv rural low-voltage distribution network access to the operation strategy,in order to improve because of "coal to electricity load power capacity expansion after China’s entry into wto and the rural high proportion distributed photovoltaic given problem.Is established considering the distributed photovoltaic access"coal to electricity" project residents heating costs and distribution network reconstruction planning year of values such as the whole life cycle cost model,the photovoltaic capacity in different heating modes and distribution transformer capacity as optimization variables,using particle swarm optimization algorithm for the model,the numerical example shows that under the condition of reasonable capacity allocation,photovoltaic system access can effectively reduce the total cost of "coal to electricity" project.Were studied in the implementation of the project for the "coal to electricity",mainly air source heat pump heating under the different heating way,distributed photovoltaic access costs for the modification of the residents heating,power distribution network planning problem,the influence of the reconstruction and built contains the "coal to electricity" project of distributed photovoltaic access residents heating transformation and distribution network reconstruction in whole life cycle value,a mathematics model of the lowest cost and the actual coal to electrical engineering and its rationality was verified.Through the research of this paper,it can provide certain reference value for the promotion and implementation of "coal to power" project and sustainable development.