Damping compensation type capacitance type voltage transformer for eliminating ferromagnetic resonance

A technology of voltage transformer and compensating reactor, applied in the field of transformer, can solve the problems of long time and large amount of engineering, and achieve the effects of reducing maintenance cost, suppressing and eliminating ferromagnetic resonance, and suppressing ferromagnetic resonance

Pending Publication Date: 2020-07-24
陕西正泰智能电气有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the lightning arrester BL is installed in the electromagnetic unit oil tank, the replacement of the lightning arrester BL needs to remove the entire capacitive voltage transformer from the system, which requires a large amount of engineering and takes a long time. Therefore, it is necessary to improve the above problems

Method used

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  • Damping compensation type capacitance type voltage transformer for eliminating ferromagnetic resonance
  • Damping compensation type capacitance type voltage transformer for eliminating ferromagnetic resonance
  • Damping compensation type capacitance type voltage transformer for eliminating ferromagnetic resonance

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Embodiment Construction

[0015] In describing the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", " The orientation or positional relationship indicated by "outside", etc. is based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, so as to Specific orientation configurations and operations, therefore, are not to be construed as limitations of the invention.

[0016] Take the existing TYD220 / √3-0.005 capacitive voltage transformer as an example.

[0017] Attached below figure 2 An embodiment of the present invention is described so as to clearly and completely describe the technical solution. Obviously, the described embodiment is only a part of the embodiments of the present invention, rath...

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Abstract

The invention provides a damping compensation type capacitance type voltage transformer for eliminating ferromagnetic resonance. According to the damping compensation type capacitance type voltage transformer, one end of a middle transformer T is connected between a high-voltage capacitor C1 and a voltage-dividing capacitor C2; the other end of the middle transformer T is connected to the lower end of the voltage-dividing capacitor C2 through a compensation reactor L; the lower end portion of the voltage-dividing capacitor C2 is grounded; a damper Z is connected to the secondary winding of themiddle transformer T; a low-voltage winding L1 is wound on the iron core of the compensation reactor L, is led into the secondary terminal box of the capacitance type voltage transformer through a lead wire and is connected with a damping compensation resonance elimination device arranged in the secondary terminal box; and the damper Z and the damping compensation resonance elimination device arematched to achieve the purpose of restraining and eliminating ferromagnetic resonance. According to the invention, the defect of large lightning arrester replacement work amount of the traditional capacitance type voltage transformer is solved, the requirements of equipment inhibition and ferromagnetic resonance elimination can be met, the structure is simple, the design is novel, the connectionis convenient, and the maintenance cost of the capacitance type voltage transformer is reduced.

Description

technical field [0001] The invention belongs to the technical field of transformers, in particular to a damping compensation capacitive voltage transformer for eliminating ferromagnetic resonance. Background technique [0002] Capacitive voltage transformer is composed of capacitive voltage divider, intermediate transformer and compensating reactor. A type of voltage transformer for automatic control and other purposes. Since the capacitive voltage transformer is composed of a linear energy storage element (capacitive voltage divider) connected with a nonlinear energy storage element (intermediate transformer and compensation reactor), when a voltage disturbance occurs in the power system or a sudden short circuit occurs secondary to the transformer When short-circuited, the capacitive voltage transformer may enter a working state called ferromagnetic resonance. At this time, the secondary voltage and waveform continue to be abnormal, causing the relay protection device to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H7/05H01F27/40H01F27/30H01F27/42
CPCH01F27/306H01F27/402H01F27/425H02H7/05
Inventor 赵建洲陈为强刘德伟孟新志李水清
Owner 陕西正泰智能电气有限公司
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