A method for judging abnormal electricity consumption of building users

Abstract

The invention discloses a method for judging abnormal electricity consumption of building users. The non-residential measurement terminal based on the method is installed in the meter box of the building. . The determination method The analysis method includes building a circuit model, writing a mathematical model, calculating the impedance of the feeder branch line, and determining the abnormal power consumption behavior of users; first, the circuit model is established based on the topology of the low-voltage distribution network; Model; calculate feeder branch line impedance based on measurement data and impedance correction function; calculate user loop impedance according to user entrance section impedance and feeder branch line impedance; compare user loop impedance calculated by different users at the same node, or Compared with the abnormal power consumption judgment threshold, it is judged whether the user has abnormal power consumption behavior. The invention can effectively discover the abnormal power consumption behavior of the user stealing electricity, and help the power manager to strengthen the management of power consumption.

Description

technical field [0001] The invention relates to the technical field of electric power management, in particular to a method for judging abnormal electricity consumption of building users. Background technique [0002] With the increase of the service life of the line and the erosion of the external harsh natural environment, the line will gradually age. On the one hand, there is a possibility of disconnection in the aging line, and more often, after the aging of the wire, the insulation performance decreases, and leakage or short circuit is prone to occur. Single-phase-to-ground short-circuit faults are the main cause of various faults in the power grid, accounting for about 90%. For distribution networks with complex topological structures and huge networks, troubleshooting after a single-phase ground fault usually requires a large number of operators and inspection personnel to go to the site for investigation. Usually, there are segmental inspection methods, branch line m...

AI Technical Summary

Problems solved by technology

For distribution networks with complex topological structures and huge networks, troubleshooting after a single-phase ground fault usually requires a large number of operators and inspection personnel to go to the site for investigation. Usually, there are segmental inspection methods, branch line methods, scrutiny and inquiry methods, and instrumentation methods. Single-phase ground fault greatly affects the power supply reliability of the power grid and the normal power consumption of users

In addition, the phenomenon of stealing electricity has always occurred from time to time, and the methods are becoming more and more sophisticated, which increases the difficulty of electric power inspection to a certain extent, brings inconvenience to the management of electricity consumption, affects the economic benefits of electric power companies, and also exists in great danger

Images