Temperature protection method and device for power plant equipment

By verifying the temperature markings and quality indicators at temperature measurement points, and combining the rate of temperature change and dynamic thresholds, the system can distinguish between real faults and instantaneous jumps in power plant equipment, thus solving the problem of malfunctions in the temperature protection system and ensuring the safe and stable operation of the generator set.

CN120691302APending Publication Date: 2025-09-23HUANENG LANCANG RIVER HYDROPOWER CO LTD
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Patent Information

Application Number
CN202510706749.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-05-29
Publication Date
2025-09-23

AI Technical Summary

Technical Problem

The temperature protection system of a power plant is susceptible to interference, which can cause sudden changes in temperature measurement points and malfunctions, leading to unit shutdowns and affecting safe production.

Method used

By determining the temperature marker value and quality label of the temperature measuring point, calculating the rate of temperature change, and combining the dynamic threshold and counting cycle, the system can distinguish between real faults and instantaneous jumps in power plant equipment, thus ensuring the accuracy of temperature protection actions.

Benefits of technology

It improves the accuracy of temperature protection, reduces protection malfunctions, ensures the safe and stable operation of generator sets, and reduces the risk of unplanned shutdowns.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention provides a temperature protection method and device for power plant equipment, and relates to the technical field of power plant temperature protection. The method comprises the following steps: according to a temperature mark value of a previous temperature measuring point and a real-time temperature value of the current temperature measuring point, determining a temperature change rate of the current temperature measuring point; and when the quality identifier of the previous measuring point and the temperature change rate of the current measuring point meet a first condition, performing temperature protection on the power plant equipment based on the real-time temperature value of the current measuring point, and determining whether to execute a temperature protection action. According to the invention, based on the temperature mark value and the quality identifier of the previous temperature measurement point and the real-time temperature value of the current temperature measurement point, the abnormal jump of the temperature measurement point is identified, the real fault and the instantaneous jump of the power plant equipment are accurately distinguished, the data basis for executing the protection action on the power plant equipment is real and reliable, and the robustness of temperature protection is ensured. Protection misoperation conditions can be effectively reduced, non-planned shutdown is avoided, and safe and stable operation of the generator set is guaranteed.
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