Monitoring channel scheduling method and device for on-line monitoring technology of electric energy meter measurement error

Abstract

The embodiments of the invention provide a monitoring channel scheduling method and device for the metering error online monitoring technology of an electric energy meter. The method includes the following steps that: S1, signals are injected into the three channels of the electric energy meter sequentially in a polling manner during a current monitoring period, after the current monitoring periodends, the average uncertainty of each channel is obtained, the time of the injection of the signals into each channel is equal, and the uncertainty is used to evaluate the reliability of metering error; S2, the occupancy rate of each channel is calculated according to the average uncertainty of each channel, and the allocation time of each channel in a next monitoring period is calculated according to the occupancy rate of each channel, and then, a scheduling policy is generated according to the allocation time of each channel; and S3, after the next monitoring period begins, the next monitoring period is determined as a current monitoring period, and S1 is re-executed according to the scheduling policy until a monitoring task is completed. With the monitoring channel scheduling method and device of the invention adopted, an online monitoring metering error level can be improved, and effective support can be provided for the realization of a stable and reliable on-line monitoring intelligent electric energy meter.

Description

technical field [0001] The invention relates to the technical field of electric energy meter metering error monitoring, in particular to a monitoring channel scheduling method and device for the online monitoring technology of electric energy meter metering error. Background technique [0002] At present, the measurement error monitoring method for online running electric energy meters is very limited. It can only conduct random inspection on a certain area and a certain batch of electric energy meters through manual inspection. It is also possible to dismantle a certain number of electric energy meters from the field back to the laboratory for measurement error verification. The measurement error value measured by the current sample electric energy meter is estimated by statistical methods and related probability models. The distribution of measurement errors provides a basis for the estimation of the life of the electric energy meter and the management of the storage. The...

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Problems solved by technology

[0003] Aiming at the difficulty of monitoring the measurement error of the electric energy meter running online, a metering chip with the function of online monitoring of the metering error has been developed. The basic principle of the metering error online monitoring technology of the metering chip is to inject the signal into the sensor impedance circuit , by monitoring the change of the injected return signal, the change of the impedance value of the sensor circuit can be known, thereby realizing the online monitoring function of the meter error

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