A Method for Evaluating the Aging State of Transformer Insulating Oil
A technology of transformer insulating oil and aging state, which is applied in the direction of material inspection products, etc.
Active Publication Date: 2020-06-09
GUANGDONG POWER GRID CO LTD +1
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Problems solved by technology
Aiming at how to deal with the big data problems involving many types, large quantities and complex interrelationships involved in the evaluation of the insulation status of distribution transformers, knowledge mining and reasoning principles are used to process and analyze big data on the basis of establishing a large database; for distribution transformer insulation The random and fuzzy uncertain parameters involved in state evaluation are processed and analyzed by using the theory of probabilistic fuzzy sets, so as to accurately evaluate the aging state of transformer insulating oil
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Embodiment 1
[0083] figure 1 Step 1 in describes the process and method of constructing the probabilistic fuzzy set of the oil aging feature class. The oil aging characteristic class describes the combination of several parameter characteristic values when the insulating oil of the distribution transformer enters the aging state. Collect the parameters and characteristic values involved in the evaluation of the aging state of distribution transformer insulating oil from public documents (journal papers, dissertations, etc.), and form the classification of distribution transformer insulating oil aging characteristics. where N S The number of aging characteristic classes for distribution transformer insulating oil. oil aging characteristics It has different feature spaces, which can be oil medium loss, water content in oil, gas content in oil, oil breakdown voltage, oil volume resistivity, oil conductivity, acid value in oil, oil breakdown voltage, total acid value of oil, Fur...
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The invention relates to the field of electric power systems and automation of electric power systems, in particular to a method for evaluating an aging state of transformer insulating oil. The methodcomprises the following steps: establishing an operation database of a power distribution transformer by utilizing a large database of weather; establishing a transformer insulating oil aging characteristic type probability fuzzy set by utilizing mass data of relevant results of the transformer insulating oil aging evaluation method in disclosed literatures; establishing a transformer insulatingoil aging test type probability fuzzy set by utilizing the mass data of the transformer insulating oil aging test; and establishing a distance measure function between a transformer test type and thecharacteristic type data probability fuzzy set, calculating a synthesized attribute value between a random uncertainty or fuzzy uncertainty parameter and a power distribution transformer insulating oil aging state, and further determining the aging state of the power distribution transformer insulating oil.
Description
technical field [0001] The invention relates to the field of power system and automation thereof, in particular to a method for evaluating the aging state of transformer insulating oil. Background technique [0002] Subsequent maintenance and regular planned maintenance of traditional distribution network main equipment often require a lot of manpower and material resources, and the cost performance of maintenance is not high. Statistical research with a large amount of data shows that with the improvement of equipment automation, the failure mode of time-related equipment only accounts for 6% of all equipment failure modes, so the time-based periodic maintenance strategy is only effective for 6% of equipment failure modes . Based on regular maintenance combined with experience to determine the maintenance method to extend or shorten the maintenance cycle, and achieved certain results. [0003] With the increasing number of power equipment, the relationship between equipme...
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IPC IPC(8): G01N33/28
CPCG01N33/28
Inventor 张丽平吴杰康陶飞达曾振达邹志强黄智鹏杨夏
Owner GUANGDONG POWER GRID CO LTD