Stand-off ratio voltage coefficient detection method based on separable direct current voltage divider

Abstract

The invention provides a stand-off ratio voltage coefficient detection method based on a separable direct current voltage divider. The method comprises the steps of 1, measuring the relative error of the voltage of a low-voltage arm resistor of a direct current voltage divider to be measured with a first auxiliary voltage divider as the reference standard; 2, measuring the relative error of the voltage of the low-voltage arm resistor of the direct current voltage divider to be measured with a second auxiliary voltage divider as the reference standard; 3, measuring the relative error of the voltage of the low-voltage arm resistor of the direct current voltage divider to be measured with a voltage divider subcircuit formed by series connection of the first auxiliary voltage divider and the second auxiliary voltage divider as the reference standard; 4, calculating the stand-off ratio voltage coefficient of the direct current voltage divider to be measured. Compared with the prior art, the method has the advantages that detection is easier and more convenient, a detection result is more accurate, and the influence of the difference in low-voltage arm resistors of auxiliary voltage dividers on calculation of the stand-off ratio voltage coefficient of the direct current voltage divider to be measured existing during a direct voltage addition test is avoided.

Description

technical field [0001] The invention relates to a method for detecting the voltage coefficient of a DC voltage division ratio, in particular to a method for detecting the voltage coefficient of a voltage division ratio based on a separable DC voltage divider. Background technique [0002] DC voltage divider (DC voltage divider) is a device used in power systems and electrical and electronic equipment manufacturing departments to measure DC high voltage. The voltage divider ratio is generally traceable to the DC standard voltage divider. The traceability process of the voltage division ratio value of the DC standard voltage divider can be decomposed into the calibration of the resistance ratio at low voltage and the determination of the voltage coefficient of the voltage division ratio at high voltage. [0003] DC voltage addition is a method of calculating the voltage coefficient of the DC voltage divider ratio based on the test measurement results under the actual working v...

AI Technical Summary

Problems solved by technology

This not only makes the calculation formula of the voltage coefficient of the DC voltage division ratio more complicated, but also increases the implementation steps of the DC voltage addition test

At the same time, because it is very difficult to measure the difference between the resistance value of the low-voltage arm when the auxiliary DC voltage divider is used in series and when it is used alone, it is easy to introduce additional measurement errors into the calculation results of the voltage coefficient of the DC voltage divider ratio, reducing the DC voltage divider ratio. Accuracy of Voltage Coefficient Measurements

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