Method for adjusting hot-spot temperature on-line monitoring of transformer winding

A technology of transformer winding and hot spot temperature, which is applied to thermometers, thermometers, instruments, etc. that change physically/chemically, and can solve problems such as difficulty in determining the location of hot spots

Active Publication Date: 2015-06-10
T&S COMM
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  • Application Information

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Problems solved by technology

The disadvantage is that it is difficult to determine the location of the hot spot itself, and the location of the hot spot may change during the actual operation of the transformer, so the installation position of the sensor may not be able to capture the actual hot spot temperature, and the highest temperature measured is only used as the actual hot spot temperature judgment a reference to

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  • Method for adjusting hot-spot temperature on-line monitoring of transformer winding
  • Method for adjusting hot-spot temperature on-line monitoring of transformer winding
  • Method for adjusting hot-spot temperature on-line monitoring of transformer winding

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Embodiment Construction

[0026] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0027] The specific embodiment of the present invention provides a method for adjusting the online monitoring of transformer winding hot spot temperature (hereinafter referred to as the adjustment method), which is used in the field of transformer winding temperature monitoring, such as Figure 4 As shown, the adjustment method includes the following steps S1-S4:

[0028] S1. Obtain the first hot spot temperature of the winding by direct temperature measurement with optical fiber, and obtain the second hot spot temperature of the winding by thermal simulation. Specifically, the optical fiber direct temperature measurement method can refer to figure 2 , the optical fiber sensor 200 is set at different positions in the winding of the transformer 100. Generally, the transformer has three phases, so there are at least three windings, for example ...

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Abstract

The invention discloses a method for adjusting a hot-spot temperature on-line monitoring of a transformer winding. The method for adjusting the hot-spot temperature monitoring of the transformer winding comprises the following steps: S1, acquiring a first hot-spot temperature of a winding by a direct optical fiber temperature measurement method; and acquiring a second hot-spot temperature of the winding by a thermal simulation method; S2, judging whether the first hot-spot temperature is less than the second hot-spot temperature; performing step S3 if the first hot-spot temperature is not less than the second hot-spot temperature, or performing step S4 otherwise; S3, using the first hot-spot temperature as the current hot-spot temperature of the transformer winding, and returning to step S1; S4, using the second hot-spot temperature as the current hot-spot temperature of the transformer winding, and increasing the number of optical fiber measuring points in areas around a first hot-spot position, wherein the first hot-spot position is the position where the optical fiber sensors acquiring the first hot-spot temperature is located in; and returning to step S1 at the same time.

Description

technical field [0001] The invention relates to the field of on-line monitoring of transformers in power transmission and transformation equipment, in particular to a method for adjusting the on-line monitoring of transformer winding hot spot temperature. Background technique [0002] The power transformer is one of the core equipment in the power system, and its safety and stability are of great significance to ensure the reliable operation of the power system. The life of a transformer mainly depends on the insulation aging of its windings, and the performance of the insulating paper will decrease if the temperature is too high. and safe operation. Therefore, the research on the hot spot temperature of transformer winding has been widely concerned by scholars at home and abroad. [0003] At present, there are three main methods to obtain the hot spot temperature of transformer windings, namely indirect calculation method, thermal simulation measurement method and direct ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K11/32
Inventor 郑敏侯丹
Owner T&S COMM
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