User data missing estimation method for transformer area line loss calculation

Abstract

The invention discloses a user data missing estimation method for transformer area line loss calculation. The method comprises the steps of selecting a group of data adjacent to the vacant data in therepresentative day; comparing the group of data with all historical power utilization data which is in the same phase with the vacancy data and the user; finding a historical data value of which theuser power consumption behavior at the historical moment represented by the historical power consumption data is similar to the user power consumption behavior at the moment of the vacancy data, processing and recording the historical data at the moment corresponding to the vacancy position, and taking median values of all the recorded processed valuable historical data to estimate the vacancy data. The user data missing estimation method for transformer area line loss calculation provided by the invention can realize accurate estimation of power utilization data such as voltage or current representing daily missing through calculation and selection by only needing a small amount of sample data, has a high practical value, and is simple in process and easy to operate.

Description

technical field [0001] The invention relates to the field of data cleaning in the electric power industry, in particular to a method for estimating the lack of user data used for line loss calculation in a station area. Background technique [0002] Line loss is an important economic and technical index that comprehensively reflects the level of power network planning and design, production operation and management. The traditional theoretical line loss calculation method of the station area relies on the line structure parameters of the station area, the data collection of the user terminal and the exit of the station area, and the commonly used method is the root mean square current method. The calculation formula is: [0003] [0004] ΔA=NI 2 RT×10 -3 [0005] where I j is the current value at each time point on the line, I is the root mean square current of the line, and N is the structural coefficient of the current line. The single-phase two-wire power supply ta...

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Problems solved by technology

[0012] However, the deletion method cannot be applied to the original data of the line loss calculation in the station area. Because a representative day is selected for calculation of the line loss calculation, the amount of original data is small, and the random deletion of data collected by the current data acquisition equipment is common. Delete It is more difficult to guarantee accuracy after a part

For the single estimation method, the original voltage and current data required for the line loss calculation do not obey the typical normal distribution or skewed distribution, and there is no practical and reasonable theoretical basis for estimating it no matter whether it is estimated by the mean or the median

There are many methods of multiple estimation, but when they are directly applied to the voltage and current data required for line loss calculation in the station area, there are also different problems. For example, the thermal card estimation method is only analyzed from the perspective of data distribution, ignoring the measurement in the power system. The timing characteristics of the data, the effect is not good in actual application

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