海上石油平台中压电动消防泵供电可行性分析

Feasibility Analysis of Medium Voltage Power Supply for Electrically Driven Fire Pump on Offshore Oil Platform

海上石油平台电动消防泵采用中压供电可以解决消防泵启动电流过大对平台电网造成冲击的问题,避免将大功率的电动消防泵拆分为两台小功率的电动消防泵,减少消防泵的启动时间,提升消防系统的响应速度。针对规范要求消防泵供电电缆为耐火电缆,但国内尚未有满足规范要求的中压耐火电缆产品的情况,提出了采用防火涂料加绝热层保护电缆的方案。经过论证该方案可以保证非耐火电缆在火灾情况下保持正常工作,从而为海上石油平台消防泵采用中压供电提供了解决方案。

During starting stage, electrically driven fire pump produces 4-7 times electric current than the rated electric current, which will result in surge impact on the electric grid. Usually two small power pumps are used to replace one big power pump to solve the electric current surge problem, but this will increase the acceleration time of the fire pump and postpone the response of the fire water system. If the electrically driven fire pumps are supplied by medium voltage power source, the starting electric current will be reduced and the surge impact will be eliminated. An equivalent method is raised to replace the medium voltage fire resistance cable under the situation that there is no qualified product at the market. The proposed scheme can meet the related standards and design rules, and provide a solution to the medium voltage driven fire pump on offshore oil platform.