Method and system for state monitoring of steam turbine high bypass system

Abstract

The invention discloses a state monitoring method for a high-bypass system of a steam turbine, which includes: obtaining optimization data of multiple high-bypass system measuring points, wherein the optimization data is optimized through a high-side pressure reducing valve automatic control system and a high-side desuperheating water valve automatic control system Create the monitoring model of the high-side system according to the optimized data; judge the state of the high-side system through the monitoring model, and issue an alarm when the high-side system is abnormal. The invention also discloses a system applied to the state monitoring method of the steam turbine high bypass system. The above steam turbine high-bypass system state monitoring method can alarm the abnormality of the high-side pressure reducing valve and high-side desuperheating water valve of the high-side system, as well as the abnormal steam pressure and temperature behind the high-side pressure reducing valve, so as to remind the operator to check and deal with it in time. , so that the state of the high bypass system can be effectively monitored.

Description

technical field [0001] The invention relates to the technical field of thermal power generation, in particular to a state monitoring method for a high bypass system of a steam turbine. The invention also relates to a state monitoring system for a high bypass system of a steam turbine applied to the state monitoring method for a high bypass system of a steam turbine. Background technique [0002] With the increasingly market-oriented development of the power system, thermal power plants are taking on more and more peak shaving functions, requiring the units to have the ability to start and stop at any time on the basis of stable operation. Automatic adjustment and operation under 30% to 100% rated load, which puts forward higher requirements for the automatic control level of thermal power plant equipment. As the most important operation and adjustment system in the start-up process of the unit, the importance of its healthy, controllable and highly automated control is more...

AI Technical Summary

Problems solved by technology

[0004] The high-side system usually uses DCS monitoring. Only when a fault (trip) occurs, the alarm will be detected. It is difficult to find the deterioration trend of the equipment or system deviating from the normal state. When the system fails, it has caused equipment damage or unplanned shutdown of the unit. ;

[0005] The post-valve pressure control of the high-side pressure reducing valve is mostly operated manually. During the start-up period of the unit, the operating personnel operate a lot, and the control is lagging and inaccurate;

[0006] The temperature after the high-side desuperheating water valve controls the high-side pressure-reducing valve is mostly operated manually. During the start-up of the unit, the operating personnel operate a lot, and the control is lagging, inaccurate, prone to over-temperature, and reduces the life of the pipeline;

[0007] There is no monitoring method for the high bypass oil system, and it is difficult to find out the abnormality of the equipment and oil leakage in the oil pipeline through the operation monitoring panel

[0008] Therefore, how to avoid affecting the safety and reliability of the high-side system movement due to the inability to perform real-time status monitoring and automatic control optimization on the high-side system and the equipment is a technical problem that those skilled in the art need to solve at present.

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