Direct-current resistance voltage divider self-calibration method and system
A technology of DC voltage divider and DC resistance, used in instruments, measuring electrical variables, measuring devices, etc.
Pending Publication Date: 2021-10-08
CHINA ELECTRIC POWER RES INST +1
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[0005] The technical solution of the present invention provides a DC resistance voltage divider self-calibration method and system to solve the problem of how to self-calibrate the DC resistance voltage divider without an auxiliary voltage divider
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[0059] Exemplary embodiments of the present invention will now be described with reference to the drawings; however, the present invention may be embodied in many different forms and are not limited to the embodiments described herein, which are provided for the purpose of exhaustively and completely disclosing the present invention. invention and fully convey the scope of the invention to those skilled in the art. The terms used in the exemplary embodiments shown in the drawings do not limit the present invention. In the figures, the same units / elements are given the same reference numerals.
[0060] Unless otherwise specified, the terms (including scientific and technical terms) used herein have the commonly understood meanings to those skilled in the art. In addition, it can be understood that terms defined by commonly used dictionaries should be understood to have consistent meanings in the context of their related fields, and should not be understood as idealized or over...
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The invention discloses a direct-current resistance voltage divider self-calibration method and system. According to the method, a direct-current voltage divider is connected with an auxiliary unit; a plurality of divider resistors in the direct-current resistance voltage divider are connected in series, and a plurality of standard resistors in the auxiliary unit are connected in series; a first rated voltage UN is applied to the direct-current resistance voltage divider to obtain a first voltage measurement value u'1; the voltage output by the auxiliary unit is measured to obtain a second voltage measurement value u1; the plurality of divider resistors in the direct-current resistance voltage divider are connected in parallel, and the plurality of standard resistors in the auxiliary unit are connected in parallel; a second rated voltage UN / 10 is respectively applied to the direct-current resistance voltage divider to obtain a third voltage measurement value u'2; the voltage output by the auxiliary unit is measured to obtain a fourth voltage measurement value u2; and the voltage division ratio of the direct-current resistance voltage divider based on the ratio of the first voltage measurement value u'1 to the second voltage measurement value u1 and the ratio of the third voltage measurement value u'2 to the fourth voltage measurement value u2 is determined.
Description
technical field [0001] The present invention relates to the technical field of self-calibration of a DC resistance divider, and more specifically, to a self-calibration method and system for a voltage division ratio of a DC resistance divider. Background technique [0002] Due to its simple principle, good stability and high measurement accuracy, the DC resistance divider is often used as a DC voltage ratio standard. How to obtain the actual voltage division ratio of the DC resistor divider is the key to trace the source of the DC voltage. In the prior art, the methods for obtaining the actual voltage division ratio of the DC resistor divider are divided into direct method and indirect method. The direct method is to directly measure the resistance value of the voltage dividing resistor of the DC resistance voltage divider, so as to obtain the actual voltage dividing ratio of the voltage divider, or use a standard voltage divider with a higher accuracy level as a standard d...
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IPC IPC(8): G01R35/00
CPCG01R35/005
Inventor 刘俭周峰殷小东姜春阳刘浩熊博王健杜百稳
Owner CHINA ELECTRIC POWER RES INST