Theoretical line loss calculation method of 10 kV distribution station area based on the actual power transcription of secondary side of distribution transformer

Abstract

The invention relates to a theoretical line loss calculation method of a 10kV distribution station area based on the actual power reading quantity of the secondary side of a distribution transformer,11) draw a single line diagram, reading that actual electric quantity of the secondary side total met of the distribution transformer connected to the 10kV line, and collecting and collate the rated short-circuit loss power and no-load loss power of each transformer to calculate the total equivalent resistance of the winding of the distribution transformer and the fixed loss power consumption of the line; 2, collect parameter information of that line from the end to the head end of the line, branch to the main branch, calculating the total power consumption of the respective sectional line, and calculating the equivalent resistance of the 10kV line one by one according to the line segments; S3: Collect the basic parameters of the transmission line, and calculate the theoretical line loss of the 10kV distribution station area by using the forward mathematical model and the backward mathematical model respectively; S4: Analyze the factors that affect the line loss, and explore the difference and reason of the calculation results of the two mathematic models when the line loss is unknown, so as to identify whether the line loss is unknown or not.

Description

technical field [0001] The invention belongs to the field of electric quantity calculation, and relates to a method for calculating theoretical line loss of a 10kV distribution station area based on the actual electric quantity of a secondary side of a distribution transformer. Background technique [0002] Line loss refers to the power loss generated in the process of power transmission and distribution. From the perspective of the proportion of power loss in power grids at all levels, the power loss of 10kV distribution lines accounts for about 27% of the total loss, which is relatively high in each voltage level. This directly affects the economic benefits of power companies. Therefore, one of the basic tasks of the power sector is to manage the power loss of 10kV distribution lines, to find out the reasons for the large line loss in the distribution area and to take measures to reduce the loss, so as to improve the level of line loss management and the economic operation...

AI Technical Summary

Problems solved by technology

[0005] In view of this, the purpose of this invention is to solve the problems of large errors in existing measurement methods and relatively large limitations in practical applications, and combine the characteristics of the current power distribution system to establish a method for calculating theoretical line loss in both forward and reverse directions. Mathematical model, by calculating the forward and reverse theoretical line loss results and the respective power losses of line conductors and distribution transformers, comparing the theoretical line loss rate and its changes calculated by the forward and reverse models to identify unknown line losses and reflect distribution The real situation of line loss in electric line technology provides reference for the power sector to take effective loss reduction measures to improve the level of line loss management, and provides a theoretical line loss calculation method for 10kV distribution stations based on the actual power of the secondary side of the distribution transformer

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