Method and system for correcting gas production rate in transformer insulating oil partial discharge simulation test

Abstract

The invention discloses a method and system for correcting gas production rate in a transformer insulating oil partial discharge simulation test, belongs to the technical field of transformer fault diagnosis, and solves the problems of how to reduce the amount of oil samples consumed in a transformer insulating oil partial discharge simulation test process and how to improve the utilization efficiency of the oil samples. According to the technical scheme, the gas production rate and the discharge time are simplified into a linear relation according to the positive correlation between the gas production rate and the discharge time, and the gas production rate is corrected by adopting the equivalent discharge time of the kth sampling sample and the actual discharge time of the kth partial discharge simulation test, so that the implementation difficulty of an algorithm is reduced; according to the scheme, the number of oil samples consumed in the insulating oil partial discharge simulation test process is reduced, the utilization efficiency of the oil samples is improved, the test speed of the insulating oil partial discharge simulation test is increased, the influence of continuous oil extraction on the gas production rate is eliminated, and the comparability of test results of different batches is improved.

Description

technical field [0001] The invention belongs to the technical field of transformer fault diagnosis, and relates to a method and system for correcting gas production in partial discharge simulation tests of transformer insulating oil. Background technique [0002] Transformer insulating oil will deteriorate and generate gas under partial discharge fault. The more severe the fault, the more gas is produced and subsequently dissolved in the transformer insulating oil. If the faults are the same, the gas components produced are also the same. Analyzing the gas production of insulating oil is helpful to judge the fault type of the transformer. At the same time, through the partial discharge test of the transformer insulating oil, the gas production of the insulating oil under different discharge times can be analyzed, the quality of the insulating oil can be evaluated, the gas production characteristics of the insulating oil under different partial discharge faults can be identi...

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Problems solved by technology

The technical solutions of the above documents consider the influence of different discharge time lengths on the gas production when simulating the partial discharge test of transformer insulating oil. During the oil sampling process, continuous sampling or re-draining of oil does not involve the volume change of the oil sample and the gas production. Air volume conversion relationship

[0005] The disadvantages of the existing technology are: (1) When each discharge reaches the expected time, a certain amount of oil sample needs to be taken out for detection and analysis, and the oil sample in the test device is cleaned up, and then new oil is added, and the calculation starts from 0 discharge time, it is difficult to realize the accumulation of discharge time, and the oil samples subjected to discharge last time cannot be used continuously, resulting in a large amount of time-consuming simulation process and a large amount of waste of oil samples; (2) if the oil samples are to be continuously used, then It is necessary to use the working method of continuous sampling. After taking oil samples for many times, if the oil sample is insufficient, it is necessary to add new oil to the device, but this will cause several discharge times to exist in the device at the same time. oil samples, affecting the accuracy of the test results

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