Research On Time-process-oriented Distribution Network Line Loss Planning

With the deepening of national energy conservation policies and the awareness of power grid companies on line loss planning,more and more power grid companies use line loss planning as a key indicator of their operations and management.From the point of view of the power grid companies themselves,strengthening line loss planning and management is of vital importance to increase corporate profits and creating first-rate power companies.From a national point of view,it strengthens line loss planning and management for the use of resources and environmental protection.It's all significant.For this reason,this paper gives a study of the line loss planning of distribution network based on the time process,and provides a line-loss plan for distribution network based on the time process.The line loss plan is to analyze and compare the actual line loss of the distribution network with the theoretical line loss so as to formulate a corresponding loss reduction measure plan based on the difference.The traditional line loss calculation methods can be roughly classified into two categories: One is based on the time period to calculate the line loss,that is,the load current,voltage and other factors in a period of time are calculated in an average manner.In the selection of time,there is no Taking into account the characteristics of changes in the load itself,the regularity of the loads within the selected time period is relatively weak;the other is based on the point of time to perform the line loss calculation,but there is a large amount of calculation,the required amount of data information,etc.,For this method,the understanding of time is not deep enough from another perspective.Therefore,this paper adopts a time-oriented process to describe the changes of the load.By dividing the time,the original irregular load is divided into a load with a linear law over a number of time periods.The feasibility is verified by derivation.Finally,the line loss calculation is performed for each time period,thereby increasing the accuracy of the calculation and reducing the number of calculations.First of all,in terms of time division,taking into account the dynamic characteristics of the time-dependent change of the power load,the time division isfaster and the partitioning effect is better,the method of hybrid clustering is used to conduct sections with higher similarity based on the neighboring points.Clustering.The basic idea is to build a multidimensional data matrix based on sample data,examine the degree of similarity between data samples,and find the desired center point.Using the clustering method based on proximity points,the first clustering is performed.If the first clustering result is more satisfactory,the second hierarchical clustering is performed.If it is not satisfied,the threshold is reset and the clustering is repeated until The effect is satisfactory.The second hierarchical clustering is also the same method,and finally obtains satisfactory results.Second,according to the time period divided by the time-oriented method,the load data has a higher degree of similarity in its time period.Based on the idea of calculating the line loss of the rms current,the current in a certain period of time can be calculated using the idea of the average current.However,the correlation between the current data during the time period is weak and cannot be calculated using the average idea.But based on the time divided by dynamics,it can better solve the appeal problem and relatively improve the accuracy of the theoretical line loss calculation.Finally,based on the concept of time process,a method of line-loss planning for distribution network is put forward,which can effectively reduce the line loss in the distribution network and provide a time-based loss reduction method for power system.