An intelligent operation control method for a vacuum operation system of a steam combined cycle unit

By interconnecting the DCS with the MK VIe system, fully automatic control of the vacuum system of the 9FA gas-steam combined cycle unit was achieved, solving the problem of low intelligence in the traditional control mode, improving the stability and energy-saving effect of operation, and reducing the risk of human error.

CN122384541APending Publication Date: 2026-07-14GUANGZHOU ZHUJIANG LNG POWER GENERATION CO LTD
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Patent Information

Application Number
CN202610684527.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-05-18
Publication Date
2026-07-14

AI Technical Summary

Technical Problem

The traditional 9FA gas-steam combined cycle unit has a low level of intelligence in its vacuum system control mode, resulting in high risks of manual operation, high energy consumption, and imperfect control logic, making it unable to meet the requirements of full-process automation, energy saving, and safe operation.

Method used

By interconnecting the DCS with the MK VIe system, intelligent operation control methods are configured to achieve fully automatic control of the vacuum system, including automatic control of pump start-up and shutdown and valve operation based on the unit status, real-time monitoring and alarm, and providing multi-level protection mechanisms to avoid manual intervention.

Benefits of technology

It achieves fully automated control of the vacuum system, reduces the risk of human error, improves operational stability and energy-saving effect, optimizes pump operation, reduces energy consumption, and improves the safety and economy of unit operation.

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Abstract

The application discloses a kind of steam combined cycle unit vacuum operation system intelligent operation control methods, based on DCS and MK VIe system interconnection is realized, including the following steps: S1, configure vacuum system intelligent operation commissioning condition, when button is put into and commissioning condition satisfies, enter full-automatic control mode;S2, according to unit speed, generator circuit breaker state, high pressure cylinder temperature recognition unit state;S3, for different unit stage, according to condenser absolute vacuum value automatic control steam chamber vacuum pump, water ring pump, Roots pump start-stop and switching, and vacuum damage door, auxiliary steam valve action;S4, real-time monitoring pump group operating current and fault state.The application, through the parameter interconnection and logic linkage of DCS and MKVIe system, full-course without operating personnel manual operation vacuum system equipment, realizes the intelligent automation control of unit start preparation, running, shutdown whole stage vacuum system, effectively reduces human operation failure risk, optimizes pump group operation switching logic.
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