高压海底电缆锚害事故风险评估

  目的  锚害事故导致电缆受损断电将会造成较为严重的经济损失和社会影响，为降低海底电缆面临的锚害事故风险，提出了一种高压海底电缆锚害事故风险评估方法。  方法  根据事故发生的原因，将锚害事故分为抛锚事故和拖锚事故两种情况分别进行建模计算，并在单根电缆锚害风险研究的基础上，研究了多根电缆的锚害风险。  结果  根据模型计算结果，分析得出锚害事故的重要影响因子为电缆根数、警示距离、船舶速度，同时随着电缆根数减少、警示距离增加、船舶速度增大，高压海底电缆锚害事故风险将会有效降低。  结论  所提模型可有效评估高压海底电缆锚害事故风险，可以为海底电缆的防护及优化设计工作提供理论指导。

Risk Assessment Method for Anchoring Accident of High Voltage Submarine Cable

  Introduction  Cable damage and power failure caused by anchoring damage will cause serious economic loss and social impact. In order to reduce the risk of anchor damage accident of submarine cable， a risk assessment method of high-voltage submarine cable anchoring accident is proposed.  Method  According to the cause of the accident， this paper divided the anchor damage accident into two cases: anchor dropping accident and anchor dragging accident， and modeling and calculation were carried out for these two cases respectively Based on the research of single cable anchor damage risk， the anchor damage risk of multiple cables was studied.  Result  According to the model calculation results， it is concluded that the number of cables， warning distance and ship speed are the important influencing factors of anchor damage accident. Meanwhile， with the decrease of cable number， the increase of warning distance and the increase of ship speed， the risk of high-voltage submarine cable anchoring accident will be effectively reduced.  Conclusion  The proposed model can effectively evaluate the risk of high voltage submarine cable anchor damage accident， and provide theoretical guidance for the protection and optimization design of submarine cable.