Continuous chemical plant and its control loop performance real-time evaluation method and device

Abstract

The invention relates to a continuous chemical device and its control loop performance real-time evaluation method and device. The method includes: step 1, obtaining in real time the self-control state, deviation value and deviation set value of each control loop of the chemical plant; step 2, calculating the self-control state and calculation period of each control loop The loop self-control rate at the current moment; step 3, calculate the loop stability rate of each control loop at the current moment according to the deviation value, deviation set value and calculation cycle of each control loop; step 4, according to each control loop in the control loop The loop self-control rate and loop stability rate of an effective control loop are used to generate statistical data on the device self-control rate and device stability rate of chemical plants. The invention overcomes the defect that only a single control loop can be monitored and evaluated in the prior art.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a continuous chemical device and its control loop performance real-time evaluation method and device. Background technique [0002] Statistical analysis shows that at present, 30% of the loops in my country's chemical production equipment are not working in the best state due to unreasonable parameter setting or controller problems, and 60% of the control loops need online continuous monitoring and performance evaluation. International best practice shows that the improvement of the basic control loop can increase the production capacity of the device by 2%-5%, increase the product output by 5%-10%, reduce the energy consumption by 5%-15%, and reduce the rate of defective products and unplanned shutdown by 25%. -50%. [0003] At present, the monitoring of the circuit working status of most chemical plants in my country is limited to DCS. Due to the limitation of DCS functions, t...

AI Technical Summary

Problems solved by technology

[0003] At present, the monitoring of the circuit working status of most chemical plants in my country is limited to DCS. Due to the limitation of DCS functions, this monitoring can only focus on a single circuit and short-term changes, and cannot complete systematic calculations and generate overall guidance for chemical production. Significance of relevant diagnostic reports

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