横河DCS平稳率计算方法的改进

Improvement of the Calculation Method for Steady Rate of Yokogawa DCS

DCS平稳率是反映装置稳定运行的重要指标,它量化了工艺指标偏差对生产装置所造成的影响。使用Sebol语言和计算块所编制的程序存在误差大、耗费系统资源等缺点。通过使用更为简单的常规控制和计算方法进行改进后,使计算精度提升到分钟级,程序结构更为简单易读,同时将闰年的特殊情况也考虑在内。最后通过批处理程序和顺控请求命令将平稳率画面进行输出保存。

Steady rate of DCS is an important index reflecting the stable operation of plant, and quantifies the impact of process indexes deviation to the production equipment. The programs compiled by using Sebol language and calculation block features shortcomings . such as larger errors and consuming more system resources. After improving by using simpler conventional control and calculation method, the ealealation accuracy is upgraded tO minute level; the structure of program becomes simpler and easier to read. In addition, the leap year will be also taken into account. The steady rate displays are output and stored through batch processing program and sequence control commands.