Electric energy measuring error estimation method
An error estimation and electric energy measurement technology, applied in the field of electric energy measurement error analysis, can solve the problems of inability to meet the needs of refined management, inability to realize verification and monitoring, etc., to achieve the effect of improving prediction accuracy and calculation speed, and reducing the difficulty of prediction
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[0056] The voltage data and measurement error of the electric energy metering device for 10 hours are selected as the research object. Record the voltage data measured at the same access point at the same time and the voltage data measured by higher-precision metering devices. The collection frequency is once every 3 seconds, with a total of 7200 observation points. The voltage measurement error of the device is shown in the following formula:
[0057] e=y' i -y i ;
[0058] the y i is the true value of the voltage; y′ i It is the voltage value measured by the electric energy metering device; the chip used in the metering of the electric energy metering device is ADE7880.
[0059] Preprocess the measured error data to obtain the measurement error sequence, use the wavelet transform to process the measurement error sequence, and obtain a set of error sequence components, and consider the cumulative error that may occur when the new error prediction result is used as the in...
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