A method and system for correcting the evaluation of a thermal power unit sliding pressure optimization

By adjusting the water-side flow data of other operating conditions using the thermal re-volume parameters of the baseline operating condition during the sliding pressure optimization test of thermal power units, the reliability problem of water-side flow DCS data was solved, and more accurate energy consumption evaluation and peak-shaving and energy-saving operation of the units were achieved.

CN115544767BActive Publication Date: 2026-05-29HANGZHOU E ENERGY ELECTRIC POWER TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HANGZHOU E ENERGY ELECTRIC POWER TECH CO LTD
Filing Date
2022-10-09
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

In the current evaluation of sliding pressure optimization of thermal power units, the absolute value of the water-side flow DCS data is not very reliable, which leads to deviations in test results, fails to accurately reflect energy consumption differences, and affects the peak-shaving and energy-saving operation of the units.

Method used

By selecting the hot reflow volume parameters of the benchmark operating condition as the baseline value within the same test cycle, adjusting the water-side flow DCS data of other operating conditions, recalculating the heat rate, ensuring that the hot reflow volume parameters of each operating condition are synchronously adjusted to the baseline value, and drawing the sliding pressure optimization curve to guide the unit operation.

Benefits of technology

It eliminated the deviation of the water-side flow DCS data, improved the accuracy of the sliding pressure optimization test, and realized accurate energy consumption evaluation and energy-saving operation of the unit within the peak load range.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application discloses a correction method and system for evaluating sliding pressure optimization of a thermal power unit. The correction method comprises the following steps: selecting a plurality of load points from high to low within the daily peak-shaving load range of the thermal power unit; setting a plurality of comparison working conditions with different opening degrees according to the actual overlap of the high-pressure inlet valve at each test load point; recording and collecting test data; arranging the test data to calculate the heat rate HR and the heat re-volume parameter A of each comparison working condition; adjusting and correcting the water side (condensate water or main feed water) flow DCS data of the comparison working conditions except the reference working condition; determining the operation mode of the high-pressure inlet valve at each load based on the recalculated heat rate and the optimal energy-saving requirement, and then evaluating the sliding pressure optimization of the unit. The application can objectively reflect the real energy consumption difference between the comparison working conditions of the sliding pressure optimization, and effectively improves the precision of the current sliding pressure optimization test.
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