撬装式加注站控制系统的研究与设计
2017-04-18张未超
张未超
摘要:介绍了LNG撬装式加注站的原理及控制要求,并针对工艺要求设计了监控系统。本系统选用SIEMENS S7-1200系列PLC作为主控制器,依据工艺控制要求,对系统的上位机和下位机进行了设计。针对LNG撬装式加液站储罐压力的典型非线性、时变且受随机干扰的特性,本文拟采用模糊控制器进行调压。目前已在实际撬装站上得到成熟应用,为LNG撬装式加注站控制系统的开发提供了成功经验。
关键词:撬装式;加注站;LNG;储罐压力
中图分类号:TP311 文献标识码:A 文章编号:1009-3044(2016)35-0289-03
The Research and Design of the Control System of the Skid Mounted Filling Station
ZHANG Wei-chao
(Hebei University of Engineering, Handan 056038, China)
Abstract: This paper introduces the principle and control requirements of LNG skid mounted filling station, and designs the monitoring system for the process requirements. The system selects S7-1200 SIEMENS series PLC as the main controller, according to the requirements of the control process, the upper computer and lower computer of the system are designed. Aiming at the typical nonlinear, time varying and random disturbance characteristics of the tank pressure of the LNG skid mounted liquid storage tank, this paper intends to use the fuzzy controller to adjust the pressure. At present, it has been successfully applied to the actual skid mounted station, which provides successful experience for the development of LNG skid mounted filling station control system.
Key words: skid mounted; filling station; LNG; tank pressure
每到冬季全国各地将出现严重阴霾天气,空气严重污染,影响了居民生活,引发大面积流感和呼吸道疾病。其中汽车尾气是雾霾产生的罪魁祸首之一,雾霾的治理一直以来都是困扰着我国乃至世界其他各國的一个难题,尽管不断出台治理措施和办法,但都未能从根本上治理雾霾。为此,各国均在积极寻找清洁燃料,设法从根源上解决传统燃料汽车尾气而造成的空气污染问题。液化天然气(liquefied natural gas)作为一种清洁能源,凭借着其燃烧后无污染物排放的优势,越来越受到人们的欢迎。现在,公交车、出租车等公共交通工具以及部分私家车都以液化天然气为燃料[1],可从一定程度上有效缓解城市的空气污染问题,对传统汽车行业的转型带来了很大的影响,同样也促进了LNG撬装式加注站的大力发展。建设LNG撬装式加注站是治理机动车辆排放污染,改善空气环境质量的有效举措,到目前为止,LNG撬装式加注站在我国已得到广泛的应用。……
