Three-phase reactive power measuring and crosstalk compensating method for electric energy metering chip

An electric energy metering chip and crosstalk compensation technology, which is applied in the direction of electric power measurement through current/voltage, can solve problems such as reactive power calculation errors, small signal crosstalk noise effects, etc., achieve high real-time performance, accurate measurement, and easy implementation Effect
CN103076493BActive Publication Date: 2015-04-01SHANGHAI BEILING
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHANGHAI BEILING
Publication Date
2015-04-01

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Abstract

The invention discloses a three-phase reactive power measuring and crosstalk compensating method for an electric energy metering chip. The method comprises the following steps of calculating each single-phase reactive power; compensating each single-phase reactive power, so as to obtain the compensated single-phase reactive power; carrying out small-signal detection, and according to the detection result, selecting the single-phase reactive power or the compensated single-phase reactive power to calculate the total reactive power; and carrying out inverse compensation on the total reactive power. The method has the advantages that the accurate measuring of the three-phase reactive power is realized; and the problem of calculation error of the reactive power caused by the easy influence of crosstalk noise on the small signal in the electric energy metering chip is solved.
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Description

technical field

[0001] The invention relates to the field of electric energy metering, in particular to a three-phase reactive power measurement and crosstalk compensation method for electric energy metering chips. Background technique

[0002] Electric energy measurement is an important basic work that is indispensable for the production, scientific research and operation management of electric power enterprises. Nowadays, the calculation of reactive power is mainly completed by the metering chip in the electric energy meter.

[0003] At present, three-phase electric energy metering chips mostly use analog front-end and digital signal processing for metering and calculation. When measuring three-phase reactive power, it is necessary to sample three currents and three voltages at the same time, and a total of 6 analog-to-digital converters are used. The analog circuit and the subsequent digital circuit are integrated in one chip, and crosstalk between analog channels is una...

Claims

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