Converter transformer discharge characteristic testing device

Abstract

The invention discloses a converter transformer discharge characteristic testing device. The converter transformer discharge characteristic testing device is used to carry out discharge characteristic testing in different fault modes, and at the same time, a first discharge device, a second discharge device, and a third discharge device are respectively connected with an end screen of a direct current sleeve, an end screen of an alternating current sleeve, and transformer oil in a casing, and then the discharge characteristic of the converter transformer (discharge model) under action of AC-DC composite voltage is extracted, and a defect of oil chromatography of inability of accurately providing a concrete discharge type in the converter transformer is overcome, and the characteristics under the conditions of the different discharge characteristics are provided, and a defect of inability of an alternating current transformer discharge characteristic being completely used for converter transformer internal discharge fault diagnosis under the action of the AC-DC composite voltage is overcome. Great meaning is provided for the effective improvement of the discharge fault diagnosis accuracy of the converter transformer and a safe and stable operation of a power device, and an important technical support is provided for guarantee of power supply, and at the same time, great economic benefits are provided.

Description

Technical field [0001] The invention relates to the technical field of converter transformer fault diagnosis, in particular to a converter transformer discharge characteristic test device. Background technique [0002] With the rapid development of China's social economy and the continuous advancement of science and technology, the demand for electric energy in the whole society is increasing, so the scale of the power grid continues to expand. However, China's energy distribution and economic development have serious asymmetry problems. The eastern and southern economies have less developed energy resources, and the western regions are rich in energy but economically backward. Therefore, the effective transmission of western energy to the eastern and southern regions will contribute to the sustainability of the national economy. development of. High-voltage DC transmission technology has obvious advantages in long-distance and large-capacity transmission, and multiple UHV DC tr...

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Problems solved by technology

In recent years, frequent internal discharge faults have occurred inside converter transformers. Although chromatography in transformer oil can effectively detect internal overheating or discharge faults, it can only give possible fault locations inside the converter transformer, and cannot give specific internal discharge faults. type

A lot of research has been done on the discharge measurement of traditional AC transformers, but the converter transformer is subjected to AC-DC composite voltage, the discharge characteristics are completely different from the AC voltage, and its fault diagnosis characteristics cannot be fully applied to DC converter transformers. Discharge fault diagnosis

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