Error calibration method and error calibration device for metering sensor device
A metering sensor and error calibration technology, which is applied in the field of smart meter measurement, can solve the problems of metering sensor device error, low efficiency, and difficulty in error detection of metering sensor device, so as to avoid the error process, improve calibration efficiency, and solve the difficulty of error detection Effect
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Embodiment 1
[0049] In order to solve the problems of error and difficulty in error detection in metering sensor devices, this embodiment provides an error calibration method for metering sensor devices. Through this error calibration method, the original electric energy data of each metering sensor device is calibrated, and the equivalent The erroneous electric energy data or the error-free electric energy data can quickly obtain the calibrated metering data of all branches in the metering sensor system to be calibrated.
[0050] Furthermore, replacing the existing energy meter error calibration method with a metering and sensing system can improve work efficiency and reduce high costs caused by energy meter calibration and energy meter rotation.
[0051] In this embodiment, the metering sensor system to be calibrated includes one or more metering sensor devices, wherein the error calibration method in this embodiment is realized based on the principle of relative metering conservation, an...
Embodiment 2
[0090] Here, a specific case is used to illustrate: In an industrial park, there is one 10kV transformer, one 400V outgoing line on the low-voltage side as the incoming line of the 400V power supply system, and six 400V user outgoing lines. Among them, the above-mentioned 400V power supply system in the park is equipped with traditional current transformers and three-phase electric energy meters.
[0091] Such as Figure 8 As shown, the metering sensor device M1' is set on the incoming line side of the power supply and consumption system, which is a master meter for measuring incoming line metering data, and the metering sensor devices M1~M6 are set on the user outgoing line side, which are sub-meters and are used to measure outgoing line metering data.
[0092] For formula one in embodiment 1, get m=1, n=6, obtain following equation:
[0093]
[0094] For the foregoing equations, it must be assumed that the measurement error of the metering sensor device on a line (wheth...
Embodiment 3
[0108] For setting the error reference standard device in the above-mentioned embodiment 1, this embodiment also provides an optional solution as follows:
[0109] Select the metering sensor device successively from the metering sensor system to be calibrated, set the measurement error of the selected metering sensor device as a specified value, and calculate the measurement error of other metering sensor devices; according to the measurement error of the metering sensor device and the standard Measuring the relationship between errors to determine the pass rate of the metering sensor device in the metering sensor system to be calibrated; when the pass rate is greater than the preset pass rate threshold, the corresponding selected metering sensor device is an error reference standard device.
[0110] The error set in this way refers to the standard device, and its specified error value may be closer to its true error value. In special application scenarios, the process of deter...
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