基于西门子PLC的HNx中氢气含量PID级联闭环控制

The PID cascade closed-loop control of H_2 content in HNx based on Siemens PLC

基于西门子S7-400 PLC,设计了一种双PID控制器级联闭环控制模型,能实现稳定、精确地控制氮氢混合气体(HNx)中氢气的含量。该应用自投入运行以来,运行状况非常稳定,完全满足了现场控制的要求。

This article design a double PID controller cascade close- loop control muddle based on S7- 400 PLC. It can controls the hydrogen content in N2/ H2 mixed gas stably and exactly. Since the method applied in product line,it running smoothly and meets the product requirements fully.