Agricultural Network Planning Considering Distributed Power Supply

The rapid growth of rural power demand and the large changes in the electrical and electrical characteristics make the demand for power supply quality increasing.The Power Grid Corp needs to speed up the construction of a new rural power grid so as to improve the reliability of the power supply.With the continuous development of new rural energy,small and scattered new energy generation mode will be consistent with the characteristics of the new rural power supply.The distribution of distributed power into the new rural power grid will be the development direction of the rural power grid in the future.It should be fully considered to adapt to the development of rural renewable energy and distributed power,to realize the interaction between the "small power supply" and the distribution network,and to strengthen the security risk control of the multi power supply and the distributed grid.The main work and results are summarized as follows in this paper:we take a county as an example to analyze the load development of the county power grid and the structure of the power grid,and find out the existing problems in the structure of the power grid,power supply capacity,power grid equipment and the environment construction in the county power grid,and carry out the load characteristics analysis and load forecasting in this area,and the forecast results reflect the rural power consumption.In recent years,the load has changed significantly,electricity consumption has increased significantly,showing the characteristics of double peaks in summer and winter.At the same time,we also make a standard prediction for the development of distributed renewable power.Finally,we give the comprehensive load characteristics of distributed generation,and analyze its output characteristics.In view of a large number of photovoltaic centralized grid connected,this paper analyses the electrical calculation and network frame of the county power grid,and analyses the problems of low voltage and insufficient capacity in the current county power grid.First,a basic model of the new rural power grid planning is set up.The model is aimed at the efficiency index of the agricultural network investment,and satisfies the security constraints of the operation of the agricultural network.Then,on the basis of the basic model,the distributed power supply is considered in the case of the agricultural network,and the effect of the distributed power supply on the terminal load node voltage under different access positions and different access capacity is compared respectively.In the end,a new rural power grid planning model with distributed power supply is established.Finally,the optimal location and capacity of the distributed power supply are determined,so that the distributed power planning can obtain the highest economic and technical benefits,and the problems of low voltage and capacity shortage have to be solved.