Analysis and Application of High Pressure Water Mist Fire Extinguishing System in Offshore Substation

  Introduction  This paper aims to reduce the risk of shutdown or heavy loss of regional oil fields caused by platform fire in offshore substation.

  Method  Taking an offshore substation as an example, the adaptability and application scope of high pressure water mist fire extinguishing system were analyzed. Through the benchmarking analysis and calculation of domestic and foreign specifications and equipment parameter characteristics, the parameter selection and application methods of different fire extinguishing types of electrical equipment in offshore substations were proposed.

  Result  The study shows that the local application system of high pressure water mist is suitable for the oil-containing electrical primary equipment and large room, and the spray intensity shall be not less than 1.5 L/(min·m²). When taking into account the equipment waterproof grade and equipment heat dissipation is not economical, heptafluoropropane fire extinguishing system should be used for electrical secondary equipment.

  Conclusion  The research results can provide reference for the construction of fire extinguishing system in offshore substation.