A method and device for evaluating the state of a transformer bushing
A technology for transformer bushing and state assessment, which is applied in the field of electric power and can solve the problems of inaccurate results of the status assessment of transformer bushings.
Active Publication Date: 2021-10-26
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID
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Problems solved by technology
[0005] The invention provides a transformer bushing state evaluation method and device, which solves the technical problem of inaccurate results of transformer bushing operation state evaluation caused by the traditional deduction method
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Embodiment Construction
[0058] The embodiment of the present invention provides a transformer bushing state evaluation method and device, which solves the technical problem of inaccurate results of transformer bushing operation state evaluation caused by the traditional deduction method.
[0059] In order to make the purpose, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the following The described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0060] see figure 1 , the present invention provides an embodiment of a ...
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The present invention provides a transformer bushing state evaluation method and device, wherein the method includes: separately calculating the standard deviation of the limit value of each evaluation index of each level limit; according to the standard deviation of the limit value of each evaluation index of each level limit, The digital characteristics of each evaluation index normal cloud of each level are calculated separately: expected value, entropy value and super entropy value; according to the digital characteristics of each evaluation index normal cloud of each level, the level of each evaluation index is constructed by using the cloud generator Boundary cloud model; the cloud generator preset evaluation cloud generator of each evaluation index is synthesized into a single rule generator according to the preset combination rules; the transformer bushing sample is obtained by using the level boundary cloud model of each evaluation index and the single rule generator The first evaluation score of the data is compared with the preset scoring table to determine the operation state of the transformer bushing.
Description
technical field [0001] The invention relates to the field of electric power technology, in particular to a transformer bushing state evaluation method and device. Background technique [0002] A power transformer is a static electrical device that is used to change an AC voltage (current) of a certain value into another voltage (current) with the same frequency or several different values. When the primary winding is supplied with alternating current, alternating magnetic flux is generated, and the alternating magnetic flux induces an alternating electromotive force in the secondary winding through the magnetic conduction of the iron core. The level of the secondary induced electromotive force is related to the number of turns of the primary and secondary windings, that is, the voltage is proportional to the number of turns, and its main function is to transmit electric energy. [0003] Although the deduction method used in the current state evaluation of power transformers...
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IPC IPC(8): G06F17/16G01R31/12
CPCG01R31/1272G06F17/16
Inventor 马志钦林春耀肖祥杨贤孙文星周丹江丹宇
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID