Power consumer on-site electric energy meter fault remote judging method

Abstract

The invention provides a power consumer on-site electric energy meter fault remote judging method which mainly comprises the steps of receiving the voltage and current parameter values of an electric energy meter acquired and sent by a power consumer on-site electric energy meter operating parameter acquisition system by a master station central computer in real time, analyzing and processing the voltage and current parameter values of the electric energy meter through built-in programs by the master station central computer after the reception, comparing the received real-time voltage and current parameter values with the values obtained by multiplying the rated voltage and current values of the electric energy meter by different coefficients, and judging whether the electric energy meter has voltage loss, current loss or phase loss fault according to different combinations by combining the voltage lasting time and the current lasting time. According to the method, the judgment of the electric energy meter is timely and convenient, the occurrence of electric quantity errors can be avoided to the greatest extent, the electric energy metering management level is improved and the electric quantity retroaction disputes are decreased; and by replacing the traditional manual on-site detection methods, the manpower and the material resources are saved and the economic benefits of the enterprises are improved.

Description

technical field [0001] The invention relates to a fault judging method of an electric energy metering device, in particular to a method for remotely judging a fault of an electric energy meter at a power user site. Background technique [0002] The common faults in the operation of the electric energy meter include voltage loss, current loss and phase failure. In the three-phase power supply system, if the working voltage of the electric energy meter is between 60% and 78% of the rated voltage when a voltage loss occurs, the electric energy meter can still measure, but the measurement is not accurate; when the working voltage of the electric energy meter is lower than When the rated voltage is 60%, the energy meter will not measure. When a phase failure occurs on the electric energy meter, the meter will not measure. When a current loss fault occurs, the state of the current loss may be caused by normal power consumption or abnormal power consumption, but they are all abno...

AI Technical Summary

Problems solved by technology

This mode has at least the following deficiencies: First, the current on-site verification of the power supply company due to manpower problems is usually only performed on users with a capacity of more than 315 kVA, and the cycle is three months to one year. Once a problem is found, it is often due to the interval Too long will make it difficult to identify and recover the wrong electricity; second, the manual on-site verification requires the cooperation of the user, and it is difficult to find out if the user has subjective breach of contract or electricity theft; third, even if an abnormal measurement is found during the manual on-site verification , but due to the lack of effective and credible technical data on the time of the fault and the actual load during the fault, it is difficult to replenish the power; the fourth is that the data of manual on-site verification is somewhat one-sided; the fifth is due to the number of power users Many, manual inspection and verification consume a lot of manpower and material resources

For example, the Chinese patent document with the publication number CN 101162264A and the invention name "Remote Calibration and Monitoring System for Electric Energy Metering Devices" proposes to verify and monitor the electric energy metering devices through remote communication, but does not propose how to troubleshoot the electric energy metering devices. Concrete determination method; Another example is the Chinese patent document whose publication number is CN 1368777A and the title of invention is "electric energy meter data remote monitoring system", which proposes a scheme for remote data collection of electric energy meters, which mainly solves the problem of remote meter reading But it does not involve the fault judgment of the electric energy meter

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