CN218647766U

CN218647766U - Tank type electronic voltage transformer for combined electrical apparatus

Info

Publication number: CN218647766U
Application number: CN202223195018.0U
Authority: CN
Inventors: 曹金根
Original assignee: NANJING XINNING OPTO-ELECTRONICS ENGINEERING CO LTD
Current assignee: NANJING XINNING OPTO-ELECTRONICS ENGINEERING CO LTD
Priority date: 2022-12-01
Filing date: 2022-12-01
Publication date: 2023-03-17
Anticipated expiration: 2032-12-01

Abstract

The invention relates to a tank-type electronic voltage transformer for a combined electrical apparatus, which comprises a shell, a basin-type insulator, a primary conducting rod, a capacitor cylinder, a secondary output terminal, an explosion-proof sheet, an adsorbent and the like. The transition flange is arranged at the upper half part of the shell, and the shell, the basin-type insulator and the combined electrical appliance are combined into a whole through the transition flange; conductor of primary conducting rod and basin-type insulatorConnecting; a capacitor cylinder is fixedly arranged on the bottom plate; the primary conducting rod is suspended in the capacitor cylinder in the shell; the capacitor cylinder is connected with the secondary output terminal through a binding post; as sulfur hexafluoride gas is required to be filled into the combined electrical appliance for insulation, the tank body is required to be provided with an explosion-proof sheet to prevent the shell from exploding due to overlarge gas pressure; because the combined electrical apparatus needs to be filled with SF ₆ Gas insulation, so the inside of the tank body needs an adsorbent to dry the gas; because the shell, the capacitor cylinder, the primary guide rod, the secondary output terminal and the explosion-proof sheet are all made of aluminum alloy with low expansion coefficient, and each port is designed into an arc-shaped form, the point discharge is reduced, and the internal electric field is uniform.

Description

Tank type electronic voltage transformer for combined electrical apparatus

Technical Field

The invention relates to an electronic voltage transformer used in the power industry, in particular to a filling type electronic voltage transformer matched with combined electrical transformation equipment.

Background

The existing voltage transformers are mainly divided into conventional electromagnetic voltage transformers and electronic voltage transformers. Conventional electromagnetic voltage transformer is because the structure is that oil-immersed transformer generally all has the iron core, takes electromagnetic induction to carry out the transform of data, and this type of transformer is owing to use the iron core, so can appear magnetic saturation phenomenon, insulating security look up, ferromagnetic resonance etc. make electromagnetic induction ability obviously reduce, the transient state measuring accuracy is low, adds circumstances such as bulky, makes whole weight obviously heavier, the shortcoming is more, stability is relatively poor. Although the defects of large volume and magnetic saturation of the conventional electromagnetic voltage transformer are overcome, a plurality of problems are exposed in the practical process. The tank-type electronic voltage transformer for the combined electrical equipment is obviously reduced in weight, the product design and the device manufacturing process are improved, the practical measurement accuracy, temperature drift influence, electromagnetic compatibility, external vibration resistance and other problems of the electronic voltage transformer are solved, the function of the equipment is improved, and the quality of the equipment is improved.

Disclosure of Invention

The invention aims to provide a combined electrical apparatus type tank type electronic voltage transformer which is improved on the basis of the existing electronic transformer, has good shielding effect, simple and compact structure and uniform electric field distribution, and solves the problems of practical measurement accuracy, temperature drift influence, electromagnetic compatibility, external vibration resistance and the like of the electronic voltage transformer.

The invention is technically characterized in that: on considering that electric field distribution is even, the high basis of measurement accuracy, design into by casing, basin formula insulator, a conducting rod, a capacitor section of thick bamboo, bottom plate, explosion-proof piece, secondary binding post, excessive flange, adsorbent and constitute its characterized in that: the transition flange is fixedly arranged on the upper half shell of the shell; the basin-type insulator is connected with the shell; the primary conducting rod is connected with the conductor of the basin-type insulator; one end of the capacitor cylinder is connected with the bottom plate, and the periphery of one end of the primary conducting rod is suspended in the capacitor cylinder, so that the capacitor cylinder forms a low-voltage electrode; the bottom of the shell is provided with a bottom plate; the grounding electrode is arranged on the bottom plate; a secondary output terminal is arranged on the shell and used as a low-voltage signal output end; the bottom of the shell is provided with an explosion-proof sheet mounting position; the shell is internally provided with an adsorbent mounting position.

The shell is a metal cylinder made of low-expansion-coefficient aluminum alloy, and the outer surface of the whole shell of the shell is of an arc-shaped cylindrical structure.

The primary conducting rod forms a high-voltage electrode by the high voltage in the combined electrical appliance system according to the material principle of the high-voltage electrode, and the high voltage electrode is transmitted to the inside of the mutual inductor.

The capacitor cylinder is a metal cylinder body made of low-expansion coefficient aluminum alloy, so that a low-voltage electrode is formed, and the cylinder body is of an arc-shaped cylindrical structure.

The voltage of the low-voltage electrode formed by the capacitor cylinder is transmitted to the secondary output terminal through a lead.

The anti-explosion piece controls the pressure of sulfur hexafluoride gas filled in the tank body, and when the pressure of the sulfur hexafluoride gas filled in the tank body exceeds a critical value, the anti-explosion piece automatically destroys the release pressure to protect the tank body.

The adsorbent dries water molecules filled with sulfur hexafluoride gas in the tank body, so that breakdown discharge and explosion of an electric field are prevented when the water content of the sulfur hexafluoride gas filled in the tank body is too high.

When the combined electrical appliance is used, high voltage in a combined electrical appliance system is transmitted into one end of the basin-type insulator through the conducting rod, the high voltage is introduced into a cavity of the mutual inductor through the primary conducting rod, the primary conducting rod forms a high-potential electrode, meanwhile, a capacitor cylinder forms a low-potential electrode through the resistance-capacitance principle, signals are input into the secondary wiring terminal, and induction output signals are collected by the collector, analog output signals of the induction output signals are converted into digital output signals, and the digital output signals are sent into the control room for data detection and collection. The end parts of the capacitor cylinder and the primary conducting rod are designed into arc shapes, and the capacitor cylinder and the primary conducting rod are arranged for reducing point discharge and enabling an internal electric field to be uniform; the capacitor cylinder, the primary conducting rod and the shell are made of aluminum alloy with low expansion coefficient, and the purpose is to reduce the unstable data caused by temperature change.

The invention has the advantages that: the voltage transformer has simple design structure, so that the whole machine has compact structure and small volume; the single electrode device is placed in the shell in the middle, so that the internal electric field is uniformly distributed; the outer part of the shell is designed into a circular arc state, so that the integral self-cleaning performance is good; because the capacitor cylinder, the primary conducting rod and the shell are all made of aluminum alloy with low expansion coefficient, the whole body has small change along with temperature and reliable performance; because the ports of the capacitor cylinder and the conducting rod are designed into arc-shaped forms, point discharge is reduced, and the internal electric field is uniform; sulfur hexafluoride gas is adopted for insulation protection inside the cable, so that the cable is good in insulation performance; the explosion-proof sheet controls the pressure of sulfur hexafluoride gas filled in the tank body, so that the explosion caused by the overlarge pressure of the tank body is prevented, and the tank body is protected; as the adsorbent dries the water molecules filled with the sulfur hexafluoride gas in the tank body, the phenomenon that the electric field generates breakdown discharge when the water content of the sulfur hexafluoride gas filled in the tank body is too high is prevented, and thus the tank body is prevented from exploding. Because of compact, reasonable and simple structure and reliable performance, the device has great practical and popularization value.

Drawings

Fig. 1 is a schematic structural diagram of a tank-type electronic voltage transformer for a combined electrical apparatus according to the present invention.

Fig. 2 is a schematic top view of the structure of fig. 1.

Fig. 3 is a schematic structural view of a primary conducting rod of the tank-type electronic voltage transformer for the combined electrical apparatus.

Fig. 4 is a schematic structural diagram of a capacitor case of the can-type electronic voltage transformer for the combined electrical apparatus.

Fig. 5 is a schematic structural diagram of a basin insulator of the tank-type electronic voltage transformer for the combined electrical apparatus.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

An excessive flange (060) is fixedly arranged on the upper half shell of the shell (020); the basin-type insulator (010) is connected with the shell (020); the primary conducting rod (040) is connected with a conductor of the basin-type insulator (010); one end of the capacitor drum (050) is connected with the bottom plate (080), and the periphery of one end of the primary conductive rod (040) is suspended in the capacitor drum (050) to enable the capacitor drum (050) to form a low-voltage electrode; a bottom plate (08) is arranged at the bottom of the shell (020); a grounding electrode is arranged on the bottom plate (080); a secondary output terminal (070) is arranged on the shell (020) and serves as a low-voltage signal output end; the bottom of the shell (020) is provided with an explosion-proof sheet (090) installation position; an adsorbent (030) is installed and stored in the shell (020) to dry sulfur hexafluoride gas; the inner cavity of the shell (020) is filled with sulfur hexafluoride gas.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. Tank-type electronic voltage transformer for combined electrical apparatus comprises basin insulator (010), casing (020), adsorbent (030), primary conducting rod (040), electric capacity section of thick bamboo (050), excessive flange (060), secondary output terminal (070), bottom plate (080), explosion-proof piece (090), its characterized in that: an upper half shell of the shell (020) is fixedly provided with an excessive flange (060); the basin-type insulator (010) is connected with the shell (020); the primary conducting rod (040) is connected with a conductor of the basin-type insulator (010); one end of the capacitor drum (050) is connected with the bottom plate (080), and the periphery of the primary conductive rod (040) is suspended in the capacitor drum (050) so that the capacitor drum (050) forms a low-voltage electrode; a bottom plate (08) is arranged at the bottom of the shell (020); a grounding electrode is arranged on the bottom plate (080); a secondary output terminal (070) is arranged on the shell (020) and serves as a low-voltage signal output end; an explosion-proof sheet (090) is arranged at the bottom of the shell (020), and sulfur hexafluoride gas is filled in an inner cavity of the shell (020); the inside of the shell (020) needs an adsorbent (030) to dry sulfur hexafluoride gas.

2. The can-type electronic voltage transformer for a combined electrical apparatus according to claim 1, characterized in that: the casing (020) be the metal cylinder body that adopts low coefficient of expansion aluminum alloy to make as the material, the whole casing surface of casing (020) is arc tubular structure.

3. The can-type electronic voltage transformer for a combined electrical apparatus according to claim 1, characterized in that: the primary conductive rod (040) forms a high-voltage electrode by the high voltage in the combined electrical appliance system according to the material principle.

4. The can-type electronic voltage transformer for a combined electrical apparatus according to claim 1, wherein: the capacitor cylinder (050) is a metal cylinder body made of low-expansion coefficient aluminum alloy, so that a low-voltage electrode is formed, and the cylinder body is of an arc-shaped cylindrical structure.

5. The can-type electronic voltage transformer for a combined electrical apparatus according to claim 1, wherein: the low voltage formed by the capacitor barrel (050) is transmitted to a secondary output terminal (070) through a lead.

6. The can-type electronic voltage transformer for a combined electrical apparatus according to claim 1, wherein: the explosion-proof piece (090) controls the gas pressure of sulfur hexafluoride filled in the tank body, and prevents the shell from exploding due to overlarge gas pressure.

7. The can-type electronic voltage transformer for a combined electrical apparatus according to claim 1, characterized in that: the adsorbent (030) dries water molecules filled with sulfur hexafluoride gas in the tank body, and prevents explosion caused by electric field breakdown due to overhigh water content in the tank body.