Method for evaluating operation state of electronic instrument transformer

Abstract

The invention discloses a method for evaluating the operation state of an electronic instrument transformer. The method comprises the following steps of: S1) establishing a state evaluation hierarchical model of the electronic instrument transformer, and listing state quantities corresponding to all functional units; S2) establishing score deduction models of the state quantities, dividing the state quantities into three types, and respectively establishing the score deduction models; S3) calculating state score values Si of all the functional units; S4) calculating an overall state score value S of the electronic instrument transformer; and S5) getting the failure rate and reliability of the electronic instrument transformer. According to the method disclosed by the invention, the state score values Si and the overall state score value S of all the functional units of the electronic instrument transformer can be quantitatively analyzed, and the failure rate and the reliability when the overall state score value is S can be further calculated, so that the method is conductive to finding a weak link of the electronic instrument transformer and can guide the overhaul and daily maintenance of the electronic instrument transformer as well as provide a reference basis for the selection of the electronic instrument transformer, and the calculation of the reliability of the electronic instrument transformer is of a basis for risk assessment of the equipment and arrangement of an overhaul plan.

Description

technical field [0001] The invention relates to a method for evaluating the operating state of an electronic transformer. Background technique [0002] With the development of technologies such as information, microelectronics and network communication, it is the general trend for smart substations to replace traditional substations. Electronic transformers are widely used in smart substations because of their simple insulation structure and no problems such as magnetic saturation and ferromagnetic resonance. The use of electronic transformers has become one of the important features of smart substations. [0003] However, due to the relatively short time and relatively small number of electronic transformers put into use, it is still difficult to give a definite answer on how reliable they are. This restricts the development speed of smart substations to a certain extent. Therefore, the reliability research of electronic transformer has become one of the important conten...

AI Technical Summary

Problems solved by technology

[0008] 1) The preventive test is carried out periodically, generally with a long interval, such as 3 years, which does not meet the development requirements of condition-based maintenance of smart substations, and it is difficult to guide daily maintenance;

[0009] 2) The preventive test is not comprehensive enough to analyze the operating state of the electronic transformer, and the test results are too abstract and general, so it is difficult to analyze the changing trend of the operating state

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