Long-term temperature forecasting method for power cable tunnel

A power cable and prediction method technology, which is applied in the field of temperature prediction, can solve problems such as unreasonable prediction and inaccurate prediction results, and achieve the effects of high accuracy, improved resource utilization, and high precision

Inactive Publication Date: 2013-12-04
STATE GRID CORP OF CHINA +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing methods still have shortcomings such as unreasonable prediction and inaccurate prediction results.

Method used

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  • Long-term temperature forecasting method for power cable tunnel
  • Long-term temperature forecasting method for power cable tunnel
  • Long-term temperature forecasting method for power cable tunnel

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Embodiment Construction

[0027] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is carried out on the premise of the technical solution of the present invention, and detailed implementation and specific operation process are given, but the protection scope of the present invention is not limited to the following embodiments.

[0028] Such as figure 1 As shown, a long-term temperature prediction method for power cable tunnels, the method includes the following steps:

[0029] In step s1, a thermal field model of the tunnel is established to obtain a temperature variation trend.

[0030] The following assumptions are set when establishing the tunnel thermal field model:

[0031] 1) The soil is homogeneous and isotropic solid, and all thermophysical parameters are constant;

[0032] 2) The temperature of the earth's surface changes with the time cycle, and the cycle is 1 year.

[0033] Based on the above a...

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Abstract

The invention relates to a long-term temperature forecasting method for a power cable tunnel. The method includes the steps: 1) building a tunnel heat field model to obtain a temperature change trend; 2) acquiring the highest load of a current cable circuit under a normal working condition and calculating the heating value of the cable tunnel per unit length according to the highest load; 3) acquiring basic data of the cable tunnel; 4) forecasting the temperature of the cable tunnel at different time by the aid of the tunnel heat field model according to the steps 2) and 3) to generate a temperature forecasting curve. Compared with the prior art, the method has the advantages that forecasting accuracy and reasonable usability of resources are improved and the like.

Description

technical field [0001] The invention relates to a temperature prediction method, in particular to a long-term temperature prediction method of a power cable tunnel. Background technique [0002] At present, more and more cable tunnels will be built, with larger sections and more and more cables to accommodate. Some of the existing power cable tunnels have a diameter of 5.5m (similar to the section diameter of a rail transit tunnel), and can accommodate up to 36 cables. Under such conditions, research on the thermal field of the cable tunnel and mastering the relationship between the calorific value of the cable and the temperature distribution of the tunnel can promote the reasonable selection of the tunnel section, the scientific selection of the cable section and the cooling method, and ensure the safe operation of the cable. On the basis of reducing engineering investment and operating costs as much as possible. [0003] For the unsteady-state temperature prediction pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K13/00
Inventor 陆小龙杨文威何真珍
Owner STATE GRID CORP OF CHINA
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