A method and device for fast and stable control of a cold box

By using a historical state feature library of the cold box and dynamic feedforward compensation control, combined with traditional PID feedback, rapid and stable control of the cold box is achieved, solving the problems of slow start-up and load switching speed, unstable temperature and high energy consumption, thus improving equipment safety and efficiency.

CN121185025BActive Publication Date: 2026-06-09ZHONGLU ZHONGKE ENERGY STORAGE TECH CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
ZHONGLU ZHONGKE ENERGY STORAGE TECH CO LTD
Filing Date
2025-11-07
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Existing technologies suffer from slow start-up and load switching control of cold boxes, unstable temperature control, equipment damage, high energy consumption, and difficulty in adapting to changes in initial thermal states and environmental conditions.

Method used

By employing a cold box historical state feature library and a dynamic feedforward compensation control strategy, combined with traditional PID feedback control, collaborative control is achieved through historical optimal trajectory and real-time data to generate collaborative control commands, thereby realizing rapid and stable control.

Benefits of technology

It significantly improves the start-up and load switching speed of cold boxes, enhances temperature control stability, reduces the risk of equipment damage, reduces energy consumption, and improves system efficiency and automation adaptability.

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Abstract

This invention relates to the technical field of cold box control methods, and particularly to a method and apparatus for rapid and stable control of a cold box. The proposed technical solution includes: a cold box historical state feature library, a dynamic feedforward compensation calculation module, and a collaborative control output module; specifically, it includes the following steps: S1: Constructing the cold box historical state feature library; S2: Historical state modeling and dynamic feedforward compensation control strategy. By utilizing the historical optimal operating trajectory for feedforward-led control, valve adjustment can be performed more actively and in closer accordance with the actual thermal state of the cold box, significantly shortening the time required for the cold box to reach the target stable operating condition. This significantly improves temperature control stability and safety, greatly reduces the risk of equipment cracking, leakage, or even damage, and extends the service life of the cold box; it also improves the comprehensive utilization efficiency of applications such as liquid-air energy storage; and by reducing the risk of thermal stress damage, it reduces equipment maintenance costs and unexpected downtime losses.
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Citation Information

Patent Citations

  • Adaptive control device and method for cold box

    CN111090294A

  • Cooperative control method for intelligent turbine controller

    CN119179291A