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Device for measuring space charges in transformer oil under impulse voltages

A transformer oil and impulse voltage technology, applied in the direction of measuring devices, measuring electrical variables, instruments, etc., can solve the problem of unsuitable transformer oil, etc., and achieve high sensitivity, safe automatic control and signal processing, and easy automatic control and signal processing Effect

Inactive Publication Date: 2014-08-27
CHONGQING UNIV
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

However, this method is only suitable for liquid dielectrics with high Kerr coefficients, and is not suitable for transformer oils with low Kerr coefficients

Method used

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  • Device for measuring space charges in transformer oil under impulse voltages
  • Device for measuring space charges in transformer oil under impulse voltages

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Embodiment Construction

[0019] The present invention will be described in detail below with reference to the drawings.

[0020] See figure 1 The device for measuring space charge in transformer oil under impulse voltage of this embodiment includes two parts: a voltage system and an optical system. The optical system includes a helium-neon laser 1 and a light receiving device 10 arranged oppositely. On the optical path between the polarizer 2, λ / 4 wave plate I 3, beam expander 4, fuel tank 5, λ / 4 wave plate II 7, analyzer 8, spatial filter 9 and light receiving device 10 The oil tank 5 is provided with an electrode 6 containing a liquid medium; the signal output end of the light receiving device 10 is electrically connected to the signal input end of the oscilloscope 11. The helium-neon laser 1, the light receiving device 10, the polarizer 2, the λ / 4 wave plate I 3, the beam expander 4, the fuel tank 5, the λ / 4 wave plate II 7, the analyzer 8, the spatial filter 9 Both the light receiving device 10 and ...

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Abstract

The invention provides a test system for measurement of space charge distribution in transformer oil under impulse voltages. The test system comprises a voltage system and an optical system. The optical system comprises a helium-neon laser and a light receiving device. A polarizer, a lambda / 4 wave plate I, a beam expander, an oil tank, a lambda / 4 wave plate II, an analyzer, a space filter and a light receiving device body are sequentially arranged on a light path between the helium-neon laser and the light receiving device. An electrode is arranged in the oil tank. Compared with other methods for measuring space charges, a device for measuring the space charges in transformer oil under impulse voltages has the advantages of being visual, safe and reliable, and computer information processing is easy. Especially, light signals serve as measurement media, direct contact with high voltages is eliminated, safety is achieved, automatic control and signal processing are easy, the device has large advantages when applied to measurement of the space charges under the impulse high voltage effect, and the requirements for research and analysis of generation, transport and dissipation of the space charges in the transformer oil are met.

Description

Technical field [0001] The invention belongs to the test technical field of space charge measurement in transformer oil, and specifically relates to a test system for space charge measurement in transformer oil under impulse voltage. Background technique [0002] With the rapid development of my country's UHV power grid, the insulation design and manufacturing technology of power transformers is facing new challenges. In-depth study of the breakdown mechanism of transformer internal insulation under impulse voltage, and improvement and enhancement of insulation material performance are urgent needs for the development of UHV power equipment in my country. The electrical breakdown characteristics of insulating materials are the research focus of electrical equipment and the power industry. The insulating properties of dielectrics are greatly affected by their internal electric fields, and space charge plays an important role in changing the internal electric field distribution of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R29/24
Inventor 司马文霞杨庆袁涛曹雪菲施健
Owner CHONGQING UNIV
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