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Method for reducing loss of sheaths in submarine cable engineering

A submarine cable and sheath technology, applied in electrical digital data processing, special data processing applications, instruments, etc., can solve the problems of unreasonable sheath design, large loss, inaccurate method, etc., to achieve satisfactory calculation accuracy and reduce loss. , the effect of the simple method

Active Publication Date: 2013-04-03
CSG EHV POWER TRANSMISSION +1
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Problems solved by technology

[0005] The purpose of the present invention is to provide a method for reducing sheath loss in submarine cable engineering, aiming to solve the problem of unreasonable sheath design and large loss due to inaccurate methods for calculating sheath loss

Method used

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  • Method for reducing loss of sheaths in submarine cable engineering
  • Method for reducing loss of sheaths in submarine cable engineering
  • Method for reducing loss of sheaths in submarine cable engineering

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specific Embodiment

[0067] The method proposed in this paper is used to calculate the current of the submarine cable sheath of the Hainan network system, and the results are shown in Table 3.1-3.3. From the comparison of the calculated and measured values ​​of the sheath current, it can be seen that the results are similar, and the maximum errors are within 10% and 12%, respectively.

[0068]

[0069] Table 3.1 Comparison of the calculated value of the sheath current and the measured value on July 27, 2012

[0070]

[0071] Table 3.2 Comparison of the calculated value of the sheath current and the measured value on August 5, 2012

[0072]

[0073]

[0074] Table 3.3 Calculated value of sheath current at a certain load on August 5, 2012

[0075] It can be seen from the above three tables that as the load increases, the current of the cable core increases, and the induced current of the sheath increases accordingly. It can also be seen that the induced current of the sheath at both en...

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Abstract

The invention discloses a method for reducing the loss of sheaths in the submarine cable engineering. The method is characterized by concretely comprising the following steps that a wire core distribution model is built, a submarine cable wire core is equally divided into n sections, and each section is equivalent to a Pi model, wherein n is greater than 5 but is smaller than 15; the induced electromotive force of submarine cable sheaths is calculated according to an equivalent model; the induced current of the submarine cable sheaths is calculated according to the induced electromotive force of the submarine cable sheaths; and the type of sheath current limiting loss reduction equipment is selected according to the induced current obtained through calculation. When the method is adopted, calculation and evaluation measures and tools can be provided for the design of the sheath loss reduction scheme in future.

Description

technical field [0001] The invention relates to the field of submarine ultra-high voltage power transmission, in particular to a method for reducing sheath loss in submarine cable engineering. Background technique [0002] The grounding method of the sheath of the submarine cable project is that both ends are connected to each other, so the sheath has a high value of sheath circulation, which causes the heat loss of the sheath. The loss of the sheath not only wastes energy, but also affects the insulation life and reduces the current carrying capacity of the cable. Therefore, it is necessary to study the method of reducing the loss of the sheath. The research process first needs to know the sheath current. According to the analysis, the current is distributed along the axial direction of the cable. The calculated value of the sheath circulation obtained has a large deviation from the actual one, which leads to unreasonable grounding design of the sheath and serious loss. ...

Claims

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Application Information

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IPC IPC(8): G06F19/00
Inventor 杜兆斌杨泽明谌军邱有强梁敬成燕京王奇黄敏清席云华牛海清肖青王一智
Owner CSG EHV POWER TRANSMISSION
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