Dual-purpose voltage divider based on standard capacitor

A standard capacitor and voltage divider technology, used in voltage dividers, measuring current/voltage, instruments, etc., can solve the problems of unguaranteed linearity, large fluctuation of scale factor, measurement of transient signals, etc., and achieve accurate measurement of shock voltage and power frequency voltage, reducing stray inductance, reducing the effect of stray inductance

Active Publication Date: 2017-02-15
CHINA ELECTRIC POWER RES INST +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the different media of the high and low voltage arms, their temperature coefficients and voltage coefficients are also different, and the scale factor fluctuates greatly. Generally, only 3% accuracy can be guaranteed, and the linearity cannot be guaranteed. It cannot be used as a standard voltage divider to measure temporary state signal

Method used

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  • Dual-purpose voltage divider based on standard capacitor
  • Dual-purpose voltage divider based on standard capacitor
  • Dual-purpose voltage divider based on standard capacitor

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Embodiment Construction

[0032] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0033] The present invention provides a dual-purpose voltage divider based on standard capacitors, whose main structure is based on standard capacitors, and can realize the measurement of power frequency voltage and impulse voltage signals. The principle of the dual-purpose voltage divider is as figure 2 As shown, one end of the damping resistor 1 is connected to the high-voltage lead wire, and the other end is connected to the high-voltage capacitor C in turn. 1 and low voltage capacitor C 2 connection, the low voltage capaci...

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Abstract

The invention provides a dual-purpose voltage divider based on a standard capacitor. The dual-purpose voltage divider comprises a damping resistor, a high-voltage guide rod, a high-voltage electrode, a low-voltage electrode, a ground electrode and a shield electrode, wherein the high-voltage electrode, the low-voltage electrode, the ground electrode and the shield electrode are arranged coaxially in a metal ground cylinder. The low-voltage electrode, the ground electrode and the shield electrode are arranged on the outside of the high-voltage electrode successively. One end of the damping resistor is connected with a high-voltage lead and the other end of the damping resistor is connected with the high-voltage guide rod. The high-voltage guide rod is connected with the high-voltage electrode. Compared with the prior art, the dual-purpose voltage divider based on the standard capacitor uses a low-inductance structure, which reduces the stray inductance of a voltage divider circuit so as to accurately measure impact voltage and power frequency voltage.

Description

technical field [0001] The invention relates to the technical field of high voltage measurement, in particular to a dual-purpose voltage divider based on a standard capacitor. Background technique [0002] The measuring device of power frequency voltage and impulse voltage is generally a voltage divider. During the test, it will be necessary to measure the high voltage and convert it into a low voltage signal that can be measured by the secondary measuring device. Since the power frequency voltage is a continuous voltage with a long period and low frequency, the frequency response requirements of the voltage divider are low, so the power frequency voltage divider is generally a pure capacitive voltage divider, and generally does not absorb active energy. The impact voltage divider is a voltage divider for measuring the full wave of lightning or operating the full wave. The voltage waveform is an intermittent shock wave with high frequency. The energy is small but the freque...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R15/06G01R19/00G08C17/02
Inventor 龙兆芝肖凯李文婷刘高佳李智成
Owner CHINA ELECTRIC POWER RES INST
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