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Submarine cable protection based ship external destruction risk assessment method

A technology for submarine cable and risk assessment, applied in the direction of instruments, data processing applications, resources, etc., can solve the problems of inability to form standardized qualitative risk identification, grading standards, etc.

Inactive Publication Date: 2016-05-11
GUANGZHOU BUREAU CSG EHV POWER TRANSMISSION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this kind of risk identification and classification methods vary from person to person, and it is impossible to form standardized and qualitative risk identification and grading standards.

Method used

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  • Submarine cable protection based ship external destruction risk assessment method
  • Submarine cable protection based ship external destruction risk assessment method
  • Submarine cable protection based ship external destruction risk assessment method

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0135] Example 1: At 22:17 on April 02, 2013, a 498-ton cargo ship "Xin Hisense 888" registered in Fangchenggang was directly above phase B of the 500kV submarine cable in the protection area of ​​the 500kV Fugang Line submarine cable, and the speed of the ship dropped to 0.5 knots. Suspected of breaking down, it is 8,000 meters away from Nanling Terminal Station, and the ship is equipped with an anchor of 1.5 tons.

[0136] Use the risk assessment decision-making model to analyze Example 1:

[0137]

[0138]

[0139] Through analysis, it can be concluded that the accident ship "New Hisense 888" is located directly above phase B of the submarine cable. Suspected anchoring is at a high risk level relative to submarine cable safety, and emergency response work should be carried out immediately according to the disposal measures corresponding to the risk level.

example 2

[0140] Example 2: At 09:46 on April 10, 2012, a Vietnamese 961-ton cargo ship "HOANGPHUONG16" (Huang Fang 16) broke down in the protection area of ​​the 500kV Fugang Line submarine cable. Ling terminal station is about 14.9 kilometers away, and the ship is equipped with an anchor of 1 ton.

[0141] Use the risk assessment decision-making model to analyze Example 2:

[0142]

[0143]

[0144] Through the analysis, it can be concluded that the accident ship "HOANGPHUONG16" (Huang Fang 16) is located in the Class I warning area, because the average buried depth of the submarine cable routing area is 2m, the mechanical protection is in good condition, and the ship's anchor is light, the safety index value Smaller, because the ship's speed is continuously lower than 0.5 knots, it can be determined that the ship is suspected of breaking down, and it is at a medium risk level relative to the safety of submarine cables.

example 3

[0145] Example 3: At 18:35 on July 16, 2011, the Guangzhou-registered 498-ton cargo ship "Shitai 138" broke down in the protection area of ​​the 500kV Fugang Line Submarine Cable. About 3.5 kilometers, the ship is equipped with an anchor of 1 ton.

[0146] Use the risk assessment decision-making model to analyze Example 3:

[0147]

[0148] Through the analysis, it can be concluded that the accident ship "Shitai 138" is located in the second-level warning area. Since the average buried depth of the submarine cable routing area is 0.5m, the ship's anchoring poses a greater threat to the buried depth of the submarine cable in this area, and the safety index The value is relatively large, but because the accident ship is far away from the submarine cable, the probability index of anchor damage to the submarine cable is low, and the ship’s speed is continuously lower than 0.5 knots, it can be determined that the ship is suspected of breaking down. risk level.

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Abstract

The invention discloses a submarine cable protection based ship external destruction risk assessment method. Based on a cable protection mode and a current situation, in combination with factors of ship tonnage, anchor weight, transverse and longitudinal position regions of a ship relative to a submarine cable, a ship speed and the like influencing a submarine cable ship external destruction risk, mutual relations among the factors are studied and analyzed; mathematic models of an ''anchor damage resistance safety index'', a ''damage-of-anchor-to-submarine-cable probability index'' and a ''damage-of-anchor-to-submarine-cable risk index'' are established by utilizing the mutual relations among the factors; and finally a ''ship external destruction risk value'' favorable for daily staffs to perform risk identification and grading is proposed. According to the assessment method, a modern mathematic method and the risk index models are adopted, so that the factors influencing the ship external destruction risk can be combined and converted into a mathematic analysis model; and the method has an important significance for performing precontrol in advance and taking effective control measures for standard and systematic identification and grading of the ship hazard risk.

Description

technical field [0001] The invention relates to the technical field of submarine power transmission, in particular to a method for assessing the risk of ship external force damage based on submarine cable protection. Background technique [0002] According to domestic and foreign submarine cable operation experience data, it is shown that fishing activities, shipping and marine engineering ships, and natural disasters are the three major causes of submarine cable damage, of which more than 90% of submarine cable damage is caused by ship anchorage. The damage mode of the anchor to the submarine cable is mainly that the anchor penetrates the buried silt layer above the submarine cable and directly pierces the submarine cable or the anchor penetrates into the seabed around the submarine cable. The cable breaks. The 500kV submarine cable route crosses the main channel of the Qiongzhou Strait, and the sea traffic is heavy. In the past three years, the average annual ship flow in...

Claims

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Application Information

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IPC IPC(8): G06Q10/06G06Q50/06
CPCG06Q10/0635G06Q50/06
Inventor 何才豪莫林涛杜涛宇岑贞锦陈航伟黄小卫陈政梁健覃锦治吕泰龙
Owner GUANGZHOU BUREAU CSG EHV POWER TRANSMISSION
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