A method for monitoring average life loss of a transformer group

An average life, transformer technology, applied in instruments, artificial life, calculation models, etc., can solve the problems of complex solution process, large error of indirect measurement method, difficult operation and maintenance of direct measurement method, etc.

Inactive Publication Date: 2019-04-09
SOUTHWEST JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to the difficulty of operation and maintenance and high cost, the direct measurement method is difficult to popularize and apply; the indirect measurement method has large errors and the solution process is too complicated. Therefore, the above methods have certain limitations

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  • A method for monitoring average life loss of a transformer group
  • A method for monitoring average life loss of a transformer group
  • A method for monitoring average life loss of a transformer group

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Embodiment Construction

[0044] The present invention will be further described below in conjunction with the drawings and specific implementation process. It should be emphasized that the specific implementation cases described here are only used to explain the present invention, and do not limit the scope of the inventive concept and the claims thereof.

[0045] The first step is to measure the hot spot temperature, ambient temperature and load current data of a transformer equipped with optical fiber temperature measurement equipment;

[0046] The second step is to set the basic framework of the hot spot temperature prediction model as follows:

[0047]

[0048] In formula (1), θ hs is the hot spot temperature; Ipu is the load factor, θ amb is the ambient temperature, t represents the time variable;

[0049] The third step is to calculate the time differential value of the hot spot temperature data obtained in the first step And compare the load current with the rated current to get the loa...

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Abstract

The invention discloses a method for monitoring average life loss of a transformer group. The method comprises the following steps: acquiring hot spot temperature, ambient temperature and load currentdata actually measured by a transformer; Establishing an explicit hot spot temperature prediction model based on genetic programming; Calculating the relative aging rate of the transformer by combining the established hot spot prediction model and the relative aging rate model; Calculating the average life loss of the transformer according to the relative aging rate and life loss model; And according to the environment temperature and the load current monitored by the substation in real time, monitoring the average life loss of the transformer group with the same capacity in the same line orthe same area in real time. The method has the beneficial effects that on-line monitoring of the average service life loss of the transformer can be achieved only through the environment temperature and the load current monitored by the substation in real time; According to similar thermal characteristics and load characteristics of transformers of the same capacity model in the same line or the same area, the average life loss of the transformer group can be monitored in batches.

Description

technical field [0001] The invention relates to the field of electrical insulation on-line monitoring and fault diagnosis, in particular to a monitoring method for the average life loss of a transformer group. Background technique [0002] Transformer is the core equipment of the power system, and its efficient and safe operation plays a vital role in the operation and development of the power industry. The working life of a transformer depends on the internal insulation performance, and thermal aging is the main factor affecting the deterioration of its insulation performance. The influence of temperature rise on the aging and insulation of its equipment is the focus and hot issue of transformer technology research. The higher the temperature, the faster the aging rate, which directly affects the service life and economic benefits of the equipment. Therefore, monitoring the hot spot temperature of the internal winding of the transformer, and then obtaining the average life...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50G06N3/00
CPCG06F30/20G06F2119/04G06N3/006
Inventor 黄林郭蕾唐浩龙王健袁帅王路伽周利军
Owner SOUTHWEST JIAOTONG UNIV
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