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Method and device for determining temperature of cable group cable cores and installation method of device

A determination method and technology of cable groups, applied in the field of cable temperature evaluation, can solve problems such as the accuracy needs to be improved, the environmental conditions are changeable, and the laying conditions of cable groups are complex.

Active Publication Date: 2014-02-19
SHENZHEN POWER SUPPLY BUREAU +1
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Problems solved by technology

[0004] However, in the actual field, the laying conditions of the cable group are complex and the environmental conditions are changeable. The existing methods of calculating the cable temperature using IEC standards in the prior art are mainly aimed at a single cable, and for multiple cables running at the same time. Accuracy needs to be improved

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  • Method and device for determining temperature of cable group cable cores and installation method of device
  • Method and device for determining temperature of cable group cable cores and installation method of device

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[0066] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all of them. 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.

[0067] see figure 1 , is a schematic flow chart of the first embodiment of the method for determining the temperature of a cable group based on distributed optical fiber temperature measurement provided by the present invention, as shown in figure 1 As shown, the method for determining the temperature of the cable group includes:

[0068] Step S101, measuring the environmental parameters of the laying of the cable group and the paramet...

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Abstract

The invention discloses a method and device for determining the temperature of cable group cable cores based on distributed optical fiber temperature measurement, and an installation method of a distributed optical fiber temperature measuring device. The method for determining the temperature of a cable group comprises the steps of measuring parameters of the environment where the cable group is laid, and parameters of cables in the cable group; establishing a cable group model according to the parameters of the environment and the parameters of the cables; reading a current of a conductor of the cable group, and according to the cable group model, conducting simulation computation on the skin temperature of the cables to obtain the estimated skin temperature Tc of the first cables in the cable group; measuring the actual skin temperature Tb of the first cables in the cable group in the axial direction; according to the estimated skin temperature Tc and the actual skin temperature Tb, computing a conversion coefficient alpha; according to the conversion coefficient alpha, correcting the estimated skin temperature of the cables, and computing actual skin temperature of each cable in the cable group. According to the method and device, the computational accuracy of the temperature of the cable group can be improved, and the temperature computation range of the cable group can be increased.

Description

technical field [0001] The invention belongs to the field of cable temperature evaluation of power cable equipment, and in particular relates to a method and device for determining the core temperature of a cable group based on distributed optical fiber temperature measurement, and an installation method for the distributed optical fiber temperature measurement device. Background technique [0002] With the development of society and economy, the power load in urban centers is increasing, and the requirements for power supply reliability are also getting higher and higher. In addition, overhead cables will cause visual pollution and electromagnetic pollution, so underground cable power supply is an inevitable trend in the development of modern cities. [0003] In recent years, there have been many accidents at home and abroad that caused the thermal collapse of the cable due to the load exceeding its actual current-carrying capacity, which proves the urgency and importance o...

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Application Information

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IPC IPC(8): G01K11/32
Inventor 赵艾萱卢旭邓军波张冠军余鹏赵宇明
Owner SHENZHEN POWER SUPPLY BUREAU
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