Method and device for automatically correcting voltage influence quantity of electric energy measurement chip
An electric energy metering chip and voltage-influenced technology, applied in the field of electric power, can solve problems such as the operation is not simple and convenient, and the influence of input voltage electric energy measurement accuracy cannot be eliminated, so as to achieve the effect of eliminating the influence and reducing the workload
Active Publication Date: 2015-03-11
HI TREND TECH SHANGHAI
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[0007] The inventors of the present invention found that none of the calibration methods for electric energy errors in the prior art can eliminate the influence of unstable input voltage on the accuracy of electric energy measurement, and the operation is not simple and convenient enough
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[0029] In the following description, many technical details are proposed in order to enable readers to better understand the application. However, those skilled in the art can understand that without these technical details and various changes and modifications based on the following implementation modes, the technical solution claimed in each claim of the present application can be realized.
[0030] In order to make the purpose, technical solution and advantages of the present invention clearer, the following will further describe the implementation of the present invention in detail in conjunction with the accompanying drawings.
[0031] The first embodiment of the present invention relates to an automatic correction method for the voltage influence quantity of an electric energy metering chip. figure 1 It is a schematic flow chart of the method for automatically correcting the voltage influence quantity of the electric energy metering chip.
[0032] Specifically, as figu...
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The invention relate to the electrical power field discloses a method for automatically correcting voltage influence quantity of an electric energy measurement chip and a device for automatically correcting voltage influence quantity of an electric energy measurement chip. According to the invention, different kinds of input voltage are loaded to the electric energy measurement chip, resistive loads and ammeter error values of different input voltage values under appointed input current are respectively measured, and curve fitting is directly or indirectly carried out on the different kinds of input voltage and the corresponding ammeter error values to obtain a curve parameter; the intensity of the appointed input current is smaller than 10% of the intensity of the standard input current; and the present voltage value is measured, the error value of the ammeter under the present voltage value is calculated according to the curve parameter, and a measured active power measurement value is corrected according to the error value of the ammeter, so that the influence to the electric energy measuring accuracy, which is caused by the instability of the input voltage, can be eliminated.
Description
technical field [0001] The invention relates to the field of electric power, in particular to a technology for automatically correcting voltage influence quantities of electric energy metering chips. Background technique [0002] In the power system, all kinds of electric energy meters need to calibrate their electric energy errors before they are connected to the grid. There are many methods for this kind of calibration. In the early days, hardware calibration was used. At present, most of them use software calibration, which is based on the energy meter. Energy pulse output error. [0003] Using software to calibrate the meter will generally correct the error under resistive 1.0, 100% Un (220V), large and small current signals, and the error under inductive 0.5L, 100% Un (220V), large and small current signals. The calibrated electric meter can generally meet the electric energy measurement accuracy requirements in normal production and life. [0004] Each meter has its ...
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IPC IPC(8): G01R35/04G01R19/00
Inventor 朱昊阳常回史元张明雄
Owner HI TREND TECH SHANGHAI