High-voltage capacitor voltage coefficient measurement device and method based on electrode displacement

Abstract

The invention provides a high-voltage capacitor low-voltage electrode micro-displacement measurement device based on electrode displacement in the field of capacitor voltage coefficient measurement. The device comprises a capacitance bridge, a high-voltage power source, a tilting rotating platform and a CCD high-voltage standard capacitor; the tilting rotating platform comprises an underframe, a tilting bracket, a bracket support, a rotating component, a plurality of bolts, a first motor, a second motor and a control cabinet; and the CCD high-voltage standard capacitor is installed on the tilting rotating platform and tilts and rotates through the tilting rotating platform. The invention further provides four capacitor voltage coefficient measurement methods based on high-voltage capacitorelectrode micro-displacement measurement. The measurement device and method have the advantages that the standard device and the measurement method for high-voltage standard capacitor voltage coefficient absolute measurement are provided, measurement experiment steps are simple and visual, the experimental requirement on high-voltage standard capacitor voltage coefficient absolute measurement isgreatly lowered, and the operability of an experiment is improved.

Description

technical field [0001] The invention relates to the field of capacitance voltage coefficient measurement, in particular to a high-voltage capacitance voltage coefficient measurement device and method based on electrode displacement. Background technique [0002] Compressed gas high-voltage capacitors are easier to achieve higher voltage levels than voltage transformers because of their small size, low loss, simple structure, and small voltage coefficient. With the increase of the voltage level of the power grid, the compressed gas high-voltage capacitor has been gradually improved. In 1928, the coaxial cylindrical electrode structure capacitor proposed by Schering and Vieweg became the mainstream high-voltage standard capacitor. [0003] Due to the influence of the linear expansion coefficient of the metal electrode and the inelastic deformation of the structure, the compressed gas high-voltage capacitor with the coaxial cylindrical electrode structure is used as the measure...

AI Technical Summary

Problems solved by technology

However, the experimental conditions of the tilt method are relatively complicated, and it is difficult for ordinary high-voltage laboratories to measure the voltage coefficient of high-voltage standard capacitors by this method.

Even on the basis of an inclined rotating platform, due to the existence of measurement "noise" (measurement "noise" refers to the repeatability of the measurement system itself, the influence of environmental conditions on capacitance, etc.), the measurement of the high-voltage standard capacity by the tilt method experiment The voltage coefficient is still difficult

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