Method and system for improving frequency modulation capability of coal-fired power generating unit

By monitoring the real-time comparison between the operating frequency of the coal-fired power generating unit and the grid frequency, setting frequency regulation reference parameters, and precisely controlling the working capacity of the high-pressure cylinder, medium-pressure cylinder, and low-pressure cylinder, the problem of insufficient frequency regulation capability of the coal-fired power generating unit is solved, the frequency regulation response speed and accuracy are improved, and the grid stability and equipment life are enhanced.

CN120251333BActive Publication Date: 2026-06-09XIAN THERMAL POWER RES INST CO LTD +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
XIAN THERMAL POWER RES INST CO LTD
Filing Date
2025-03-28
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Existing coal-fired power generating units are insufficient in frequency regulation capability, slow response speed, insufficient regulation accuracy and flexibility when facing the high volatility and rapid changes of new energy power generation, which limits the grid's ability to absorb new energy power.

Method used

By monitoring the real-time comparison between the operating frequency of the coal-fired power generation unit and the grid frequency, setting frequency regulation reference parameters, and precisely controlling the working capacity of the high-pressure cylinder, intermediate-pressure cylinder and low-pressure cylinder, as well as adjusting the exhaust flow and main steam flow, precise control of the frequency of the coal-fired power generation unit can be achieved.

Benefits of technology

It improved the frequency regulation response speed and accuracy of coal-fired power generating units, enhanced the stability and reliability of the power grid, extended equipment life, optimized the operation of the denitrification system and deaerator, and ensured the safety and efficiency of the system.

✦ Generated by Eureka AI based on patent content.

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    Figure CN120251333B_ABST
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Abstract

The application discloses a method and system for improving the frequency modulation capability of a coal-fired generator unit and belongs to the technical field of coal-fired power generation. The method for improving the frequency modulation capability of the coal-fired generator unit can rapidly judge whether the coal-fired generator unit needs to adjust the output power to match the power grid demand by monitoring the operation frequency of the coal-fired generator unit and comparing the operation frequency with the power grid frequency in real time, and the adjustment range can be accurately controlled in combination with the setting of a frequency modulation reference parameter, so that the response speed and precision of frequency modulation are improved, and the stable operation of the power grid is facilitated; the control strategy is accurately determined according to the difference between the operation frequency of the coal-fired generator unit and the power grid frequency and the comparison result of the frequency modulation reference parameter, and the exhaust flow is independently adjusted or the exhaust flow and the main steam flow are coordinately adjusted, so that the optimal control effect is achieved.
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