水下生产控制系统供电电压降落分析及方案设计

Analysis on the voltage drop in power supply to subsea production control systems and power supply design

水下长电缆供电系统电压降落分析是水下远距离生产控制系统供电方案设计的关键环节之一,主要影响因素有负荷大小、电缆长度、电缆横截面积等。通过建立等值电路模型进行水下生产控制系统供电分析,计算水下生产控制系统供电电压和电缆截面,对比不同电压等级和电缆截面下的电压降落,得出最佳的供电系统设计方案。应用本文方法对荔湾3-1气田水下生产控制系统不同供电方案进行了比较,推荐了合理的供电电压和经济的电缆截面配置,为今后长距离水下生产控制系统供电方案的设计积累了经验。

Analysis of voltage drop in the long cables is one of the key steps in the power supply design for remote subsea production control systems. The long cable＇s voltage drop is mainly affected by the load, length, cross section area of the cable and etc. In this paper, the equivalent circuit model was established to analyze the power supply of subsea production control systems, calculate the supply voltage as well as the cable section, and compare the voltage drops at different voltage levels and different cable cross sec- tions, and finally, to obtain the optimal power supply scheme. The method was used to compare the vari- ous power supply schemes of LW3-1 gas field subsea control system, and recommended the reasonable supply voltage and economic cable section configuration, with experience accumulated for the future design of subsea production control system＇s power supply.