Capacitive voltage division electronic voltage transformer with double capacitive rings

Abstract

The invention relates to a single-phase capacitive voltage division electronic voltage transformer which comprises a shell, a base, a support, intermediate electrodes, an insulating support, a high-voltage electrode, a junction box, a disc insulator, an explosion-proof device, an upper shielding ring, a lower shielding ring and a grounding electrode. The shell is fixedly arranged on the base, the insulating support is fixedly arranged on the base, the grounding electrode is fixedly arranged on the insulating support, the disc insulator is fixedly arranged on the shell, the high-voltage electrode is connected with the disc insulator and is arranged in inner cavities of the intermediate electrodes, and the intermediate electrodes, the upper shielding ring and the lower shielding ring are respectively fixedly arranged on the grounding electrode. The single-phase capacitive voltage division electronic voltage transformer has the advantages that as the intermediate electrodes, the upper shielding ring, the lower shielding ring and the shell are made of aluminum alloy materials with low expansion coefficients, fluctuation of detected data due to expansion of the materials is reduced; and the high-voltage electrode is of an arc-shaped cylindrical structure, ports of the intermediate electrodes and ports of the upper and lower shielding rings are in arc-shaped transition, and accordingly point discharge is reduced.

Description

technical field [0001] The invention relates to a voltage transformer used in the electric power industry, in particular to a double-capacitance ring capacitor voltage-dividing electronic voltage transformer. Background technique [0002] After retrieving relevant patent documents, no electronic voltage transformer with the same structure as the present invention has been found. The power industry generally needs to use voltage transformers when measuring the voltage in the system or performing relay protection. Existing voltage transformers are generally electromagnetic voltage transformers. This type of transformer has a complex structure, a large volume, and a narrow frequency band. At the same time, because it uses electromagnetic induction, it needs to have an iron core, so magnetic saturation occurs. Although the existing electronic voltage transformer overcomes the defects of the iron core used in the traditional electromagnetic transformer, making it significantly s...

AI Technical Summary

Problems solved by technology

The existing voltage transformers are generally electromagnetic voltage transformers. Due to their complex structure, large volume and narrow frequency band, and because they need to have iron cores for electromagnetic induction, magnetic saturation will occur.

Although the existing electronic voltage transformer overcomes the defects of the iron core used in the traditional electromagnetic transformer, making it significantly smaller in size and lighter in weight, but also has many deficiencies in its shie

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