基于PLC的CNG气站联动报警控制系统研究

摘要

In order to meet the requirements of CNG station security, this article through to the CNG station of four branch systems: desulfurization dehydration system, compressor, gas storage system, and the gas system of combustible gas leak detection; In combination with field operation parameters of collection, designed based on Siemens S7-300 PLC stations network control system and combustible gas alarm control system, set the alarm value and carries on the linkage control in network control part, through the combustible gas detection alarm finally realized the CNG stations safety early warning , and measurement, a system integration; Finally through experimental verification safety factor can be increased by 20%, which provides effective support for the application of station.%为了满足CNG加气站安全的需求，本文通过对CNG气站的4个分支系统：脱硫脱水系统、压缩机系统、储气系统，以及加气系统可燃气体泄露的检测；结合现场运行参数的收集，设计了基于西门子S7-300PLC的加气站管网控制系统和可燃气体报警控制系统，设定了报警值并在管网控制部分进行联动控制，通过可燃气体检测报警最终实现了CNG加气站的安全预警、和测量，达成系统集成；最终通过实验验证可将安全系数提高20%，从而对气站的应用方面提供有效的支持。