Health state early warning method and device of distribution transformer

A technology for distribution transformers and health status, applied in the field of distribution transformers, can solve problems such as inaccurate health status warning results and inability to obtain equipment health status information in real time.

Pending Publication Date: 2019-07-12
CHINA ELECTRIC POWER RES INST +2
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0003] The health status of traditional distribution transformers is mainly obtained through offline tests such as regular inspections and planned maintenance pre-tests. It is impossible to obtain real-time health status information of equipment, and the early warning results of health status are not accurate.

Method used

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  • Health state early warning method and device of distribution transformer
  • Health state early warning method and device of distribution transformer
  • Health state early warning method and device of distribution transformer

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Embodiment Construction

[0063] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0064] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. 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.

[0065] The invention provides a method for early warning of the health status of distribution transformers, such as figure 1 As shown, the method includes:

[0066] Step 1. Collect th...

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Abstract

The invention relates to a health state early warning method and device of a distribution transformer. The method comprises the following steps: collecting the load current of the distribution transformer and an ambient temperature of the environment in which the distribution transformer is located; determining a winding hot-spot temperature of the distribution transformer according to the load current of the distribution transformer and the ambient temperature of the environment in which the distribution transformer is located; and performing health state early warning of the distribution transformer according to the winding hot-spot temperature of the distribution transformer. According to the health state early warning method and device provided by the invention, the accurate real-timemonitoring of the winding hot-spot temperature of the distribution transformer is achieved by measuring the external temperature, and the voltage and the current of the distribution transformer, and the operation state of the distribution transformer is estimated to provide an important support for the overload control of the distribution transformer, the use efficiency of the distribution transformer and the safe and stable operation of the distribution transformer.

Description

technical field [0001] The invention relates to the technical field of distribution transformers, in particular to a health state warning method and device for distribution transformers. Background technique [0002] The distribution transformer is one of the key equipment of the distribution network, and its life is closely related to the change of the internal insulation of the transformer. The hot spot temperature of distribution transformers, that is, the highest point temperature value reached in the insulation area of ​​the transformer, is one of the most important reasons affecting the insulation life of windings, and it is also the most important limiting factor of the transformer load value. When the load exceeds the rated capacity or the ambient temperature is higher than the design ambient temperature, the transformer may suffer a certain degree of danger and accelerate aging. A short-term increase in load will increase the copper loss of the transformer, increas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/02
CPCG01R31/62
Inventor 王利王庆杰廖天明杨红磊韩筛根宋祺鹏
Owner CHINA ELECTRIC POWER RES INST
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