Streamer discharge test system for insulating oil

Abstract

The present invention discloses a streamer discharge test system for insulating oil. The streamer discharge test system comprises an impulse voltage generator, a voltage divider, a transient current detection device, a discharge test oil tank, a high-speed imaging recorder, a synchronous triggering and measuring part and a photomultiplier; a high-voltage electrode and a grounding electrode are arranged in the discharge test oil tank; discharge streamers are formed between the high-voltage electrode and the grounding electrode under impulse voltage; the transient current detection device is used for detecting current generated immediately when the high-voltage electrode carries out discharge; the output end of the photomultiplier is connected with a signal channel corresponding to the synchronous triggering and measuring part; the photomultiplier is used for receiving photons of the streamers generated between the high-voltage electrode and the grounding electrode; and the high-speed imaging recorder photographs the streamers generated between the high-voltage electrode and the grounding electrode through an observation hole. With the streamer discharge test system of the invention adopted, pre-discharge phenomena can be controllable, and basic discharge electrical parameters can be obtained, and at the same time, the transient image of discharge can be captured timely and enhanced, and the cleanliness and visual effect of a test sample can be ensured trough an oil filtering system.

Description

technical field [0001] The invention relates to the field of long-gap discharge test and measurement of vegetable oil, in particular to a flow discharge test system in insulating oil. Background technique [0002] Since the research on long-gap discharge in vegetable insulating oil mainly uses lightning impulse voltage, the discharge under this type of voltage is characterized by high speed and uncertainty. In addition, the long-gap discharge voltage threatens the insulation of equipment and will emit strong electromagnetic interference. Therefore, it is necessary to Complete set of tests and protection system design. In addition, the research on insulating oil mainly relies on the measurement of macroscopic parameters such as breakdown voltage and discharge current to characterize the insulating properties of insulating oil, and lacks the testing of subtle characteristics such as high-speed images and instantaneous light intensity of long-gap discharge in vegetable insulati...

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Problems solved by technology

Therefore, there is a lack of research on the discharge characteristics of insulating oil under large gaps, especially the research on the instantaneous development characteristics of long gap streamers in vegetable insulating oils

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