分输站计量回路自动控制的实现  

Realization of Auto-control of Metering Loop in Gas Distributing Station

作　　者：张平 管文涌 严密 曹永乐 ZHANG Ping;GUAN Wen-yong;YAN Mi;CAO Yong-le(National Pipeline Network Group West-East Gas Transmission Company)

机构地区：[1]国家管网集团西气东输公司

出　　处：《化工自动化及仪表》2020年第6期527-532,共6页Control and Instruments in Chemical Industry

摘　　要：为解决西气东输工程天然气分输站计量支路控制过程中存在的部分控制需要人工干预、部分影响计量准确性的故障无法自动切换计量支路等问题,利用站场SCADA系统程序,对西气东输天然气站场的计量回路控制逻辑进行优化,增加了计量故障自诊断和支路增开减关控制功能,实现了对计量回路的科学有效控制。试运行结果表明:计量回路自动控制逻辑具有较高的可靠性,在试运行期间累积计量天然气9×109m3,没有出现过因计量设备故障未及时自动切换而导致的计量争议;计量回路自动控制逻辑运行稳定,能够在满足逻辑执行条件时及时对流程进行调整,动作时间不超过2min。Considering the fact that metering loop’s some controls in the gas distributing station of the west-east gas transmission project ask for manual intervention,and some faults influence the metering accuracy and auto-switch of the metering loop,making use of SCADA system to optimize the metering loop’s control logic of the gas distributing station was implemented to increase self-diagnosis of metering failure,and to realize the control function of branch opening and closing,including the scientific and effective control of the metering loop.Trail operation results showed that,the auto-control logic of the metering loop has better reliability and the cumulative metering volume of natural gas was 9×109m3 during half a year’s trial operation;and no dispute on measurement caused by the failure of the metering equipment occurs;the auto-control logic of the metering loop runs stably and the flow path can be adjusted in time when the condition of automatic action is satisfied,the movement time does not exceed 2 minutes.

关 键 词：计量回路控制 天然气管道 分输站 计量故障自诊断 支路增开减关控制逻辑 无人化管理 智能管理 

分 类 号：TH862[机械工程—仪器科学与技术]