Experiment method of dielectric response of frequency domain of traction transformer under loading condition

Abstract

The invention discloses an experiment method of dielectric response of frequency domain of a traction transformer under the loading condition. The experiment system comprises a dielectric response tester (1), a computer (2), a first adjustable direct-current power source (3), an adjustable alternating current power source (13), a second adjustable direct-current power source (14) and an experiment transformer (22). The experiment steps include wiring and connecting the experiment system; uploading rated no-load loss; uploading rated load loss; loading transient load loss; testing dielectric response of the frequency domain. The experiment method studies dielectric response of the frequency domain of the traction transformer under the loading condition, and can provide reliable experiment foundation platform for researching the dielectric response of the frequency domain of the traction transformer under the loading condition and promote research development of the testing technology of the dielectric response of the traction transformer.

Description

technical field [0001] The invention belongs to the field of transformer research experiments, in particular to an experimental method for researching the frequency-domain dielectric response of traction transformers under load conditions. Background technique [0002] In recent years, my country's high-speed railway has developed rapidly. As of October 2014, the total mileage of China's high-speed railway has reached 12,000 kilometers, and the "four vertical" trunk lines have basically taken shape. top of the list. With the rapid development of high-speed railways, a large number of traditional traction transformers have produced a huge power loss. According to the national "12th Five-Year Plan" for energy conservation and emission reduction, the research and promotion of energy-saving transformers is a key development direction. The safe operation of energy-saving traction transformers largely depends on its insulation state, so the insulation state detection technology of...

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Problems solved by technology

[0003] At present, the on-site test of energy-saving traction transformer frequency domain dielectric response testing technology is the insulation state test of the transformer in operation without load, because the frequency domain dielectric response test can only be tested when the temperature of the transformer is offline and the temperature drops to a relatively stable state. And the test process itself is time-consuming, so there are many limitations in the implementation of on-site tests

However, the research on the frequency-domain dielectric response test technology of transformers in the laboratory is mainly the test of oil-paper insulation samples, and there is no experimental method for studying the frequency-domain dielectric response of energy-saving traction transformers under load conditions.

The above problems seriously limit the development of research on the dielectric response of energy-saving traction transformers, so an experimental method for studying the frequency-domain dielectric response of traction transformers under load conditions is urgently needed

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