摘要
某海上油气处理平台在生产控制系统升级改造期间,所有生产流程均处于关停状态,透平发电机燃料气供给系统也随之失效,平台无法自主发电。充分分析该平台燃料气供给系统工艺流程中气源、压力、温度等参数,解读原DCS(集散控制系统)底层控制程序及逻辑,利用水下井口平台弃置拆下的西门子S7-200控制器及其组件,自主编写PLC控制程序代替原DCS程序,并加装压力监测装置,铺设临时通讯电缆,组装监控上位机及输入、输出装置,成功搭建燃料气供给临时控制系统。实现生产控制系统升级期间燃料气正常供应,保障了海上平台空气压缩机、造淡水机、办公、照明等方面的用电。通过设计PID选择控制程序,细化控制程序在旧系统、临时系统、新系统三者之间的切换流程,实现了透平发电机在新旧燃气系统之间不停车无扰切换。同时,设计临时燃料气系统多种可切换操作模式,保障了燃料气的稳定供给。燃料气临时系统的应用不仅解决了平台生产、生活供电问题,还避免了外租大型发电设备,从而降低了生产控制系统升级成本。
During the upgrading of the production control system of an offshore oil and gas process platform,all production processes are shut down,and the fuel gas supply system of the turbine genera-tor fails,making the platform unable to generate electricity independently.The parameters such as gas source,pressure,and temperature in the process flow of the fuel gas supply system of this platform are fully analyzed,and the underlying control program and logic of the original DCS(Distributed Control System)are interpreted.Using the abandoned Siemens S7-200 controller and its components on the un-derwater wellhead platform,a PLC control program is independently written to replace the original DCS program.In addition,pressure monitoring device is installed,temporary communication cable is laid,monitoring host computer and input/output devices are assembled,and finally,the temporary fuel gas supply control system is successfully built.The normal supply of fuel gas during the upgrading of the production control system is realized,and the electricity consumption of air compressors,fresh wa-ter machine,offices,lighting and other aspects of the offshore platform are ensured.By designing a PID selective control program,the switching process between the old system,temporary system,and new system is refined,achieving the no-stop and no-disturb switching of the turbine generator be-tween the old and new fuel gas systems.At the same time,the temporary fuel gas system is designed with various switching operation modes to ensure the stable supply of fuel gas.The application of the fu-el gas temporary system not only solves the problems of platform production and daily power supply,but also avoids renting large power generation equipment,thus reducing the cost of upgrading the pro-duction control system.
作者
王子佳
廖鸿
刘文山
黄海勇
WANG Zijia;LIAO Hong;LIU Wenshan;HUANG Haiyong(Lingshui-Yacheng Operating Company,CNOOC(China))
出处
《油气田地面工程》
2024年第7期47-51,共5页
Oil-Gas Field Surface Engineering
