The Study of Burial Depth and Risk Assessment of Submarine Power Cable

Abstract

In this paper, the determination of submarine cable burial depth and risk assessment method are studied. The main objective of the method is to optimize the burial depth of submarine cable in terms of specifying an economically feasible buried depth which ensures a satisfactory level of protection and by acceptable risk. The risk factors influencing the burial depth of submarine cables were analyzed. The primary risk to which submarine cables are exposed is anchoring, while the environmental factor and the cable itself have relatively smaller impact and cannot be mitigated by burial. Then the calculation method of probability and depth of penetration of anchor deployment near a submarine cable were studied. The method can reduce the protection cost while providing the cable with better protection and to guide the specification of the burial depth of submarine power cables. Compared with traditional methods which relying on operational experience, the probabilistic analysis determines the burial depth based on the water depth and seabed conditions of different sections as well as the vessel traffic of the cable route which is an accurate and quantitative approach.

Risk Assessment of Subsea Power Cables in South Sumatera Province Waters

“…Calculating the probability and depth of penetration of the anchor deployment near the submarine cable is studied. This method can reduce the cost of protection while providing lines with better protection and guiding the specification of the buried depth of subsea power cables [12]. Combining these to equations gives the following expression for the terminal energy as stated in DNV-RP-F107 is as follows [2][8]: a.…”

Simulation Analysis of Grounding Characteristics of Cable Based on ATP-EMTP

“…The main purpose of cable grounding is to ensure safety during cable operation and maintenance. Once the insulation of the metal sheath of the high-voltage cable is damaged, it will inevitably cause multi-point grounding of the metal sheath, which will lead to a significant increase in the sheath circulating current value, thereby accelerating the aging of the cable insulation, shortening the service life and transmission capacity of the cable, and threatening the safe and stable operation of the power system [6][7][8]. Therefore, Therefore, before laying the cable, it is necessary to simulate and calculate the grounding method of the cable to eliminate the above-mentioned safety hazards.…”