阅读说明：本技术 一种燃气轮机高工况运行突发停机处置方法 (Handling method for sudden shutdown of gas turbine in high-working-condition operation ) 是由 魏昌淼 蔡其波 臧军 张虞 于 2020-03-20 设计创作，主要内容包括：本发明公开了一种燃气轮机高工况运行突发停机后的处置方法,将高工况突发停机后的破坏程度降至最低。当燃气轮机高工况停机后,具备再次起动的条件,应及时再次起动燃气轮机,起动过程通过燃油调解保证起动成功,起动成功进入慢车后,进行慢车运行冷却,而后正常停机。当不具备再次起动的条件,应对机组进行冷吹,当冷吹过程转子出现卡滞现象,应停止冷吹,燃气轮机转子轴承润滑油一直处于循环状态以冷却转子轴承,大气自然冷却燃气轮机,直至转子可以盘车盘动；最后排查高工况运行突发停机原因。(The invention discloses a disposal method for a gas turbine after sudden shutdown in high-working-condition operation, which can reduce the damage degree of the gas turbine after sudden shutdown in high-working-condition to the minimum. When the gas turbine is shut down under high working conditions, the gas turbine is required to be restarted in time under the condition of restarting, the starting process is ensured to be successful through fuel regulation, after the gas turbine is started successfully and enters a slow vehicle, the slow vehicle is cooled in operation, and then the gas turbine is shut down normally. When the condition of restarting is not met, cold blowing is carried out on the unit, when the rotor is blocked in the cold blowing process, the cold blowing is stopped, the lubricating oil of the rotor bearing of the gas turbine is always in a circulating state to cool the rotor bearing, and the atmosphere naturally cools the gas turbine until the rotor can be turned and coiled; and finally, checking the reason of sudden shutdown in high-working-condition operation.)

1. A handling method for sudden shutdown of a gas turbine in high-working-condition operation is characterized by comprising the following steps:

step one, judging whether a gas turbine has a condition of restarting after sudden shutdown in high working condition operation;

step two, when the condition of restarting is met in the step one, the gas turbine is restarted in time, and the starting process is regulated through fuel oil to ensure that the starting is successful; after the slow vehicle is started successfully, the slow vehicle is cooled in operation, and then the slow vehicle is stopped normally;

step three, in the step one, when the condition of restarting is not met, cold blowing is carried out on the unit, when the rotor rotates normally in the cold blowing process, the cold blowing is carried out for a long time to cool the rotating hot component, and finally, the phenomenon of rotor clamping stagnation is not caused;

step four, when the rotor is blocked in the cold blowing process in the step three, the cold blowing is stopped, and the lubricating oil of the rotor bearing of the gas turbine is always in a circulating state to cool the rotor bearing; the atmosphere naturally cools the gas turbine until the rotor can be turned over.

Technical Field

The invention belongs to the technical field of gas turbines, and particularly relates to a handling method for sudden shutdown of a gas turbine in high-working-condition operation.

Background

The gas turbine is used as high-speed rotating power equipment, is widely applied to the aspects of power generation, industrial driving, ship power and the like, and is provided with a plurality of shutdown protection logics for protecting the safe and stable operation of the gas turbine. The method comprises the steps that in the normal operation process of a gas turbine, after the gas turbine is successfully started, a warming-up stage is carried out before the working condition is raised, and a cooling-machine stage is carried out before the working condition is lowered and the gas turbine is shut down. The invention provides a handling method for sudden shutdown of a gas turbine in high-working-condition operation, which has important significance for stable operation of the gas turbine in order to protect the service life of the gas turbine.

Disclosure of Invention

When the gas turbine runs for a long time under a high working condition, when the shutdown logic is triggered to cause sudden shutdown, the outer casing and the inner rotating heat component are contacted due to uneven heat dissipation, and the rotor is blocked and other potential safety hazards are brought. The invention aims to provide a disposal method for the gas turbine after the sudden shutdown in the high working condition operation, which can reduce the damage degree to the minimum after the sudden shutdown in the high working condition.

The purpose of the invention is realized by adopting the following technical scheme: a method for monitoring the real-time loss of excitation state of a magnetoelectric speed sensor of a gas turbine comprises the following steps:

step one, judging whether the gas turbine has the condition of restarting after the sudden shutdown of the operation under the high working condition.

Step two, when the condition of restarting is met in the step one, the gas turbine is restarted in time, and the starting process is regulated through fuel oil to ensure that the starting is successful; after the slow vehicle is started successfully, the slow vehicle is cooled in operation, and then the slow vehicle is stopped normally; and (5) checking the reason of sudden shutdown under high working condition operation after shutdown.

And step three, in the step one, when the condition of restarting is not met, cold blowing is carried out on the unit, when the rotor rotation condition is normal in the cold blowing process, the cold blowing is carried out for a long time to cool the rotating hot component, and finally, the phenomenon of rotor clamping stagnation does not occur, so that the reason of sudden shutdown in high-working-condition operation is checked.

Step four, when the rotor is blocked in the cold blowing process in the step three, the cold blowing is stopped, and the lubricating oil of the rotor bearing of the gas turbine is always in a circulating state to cool the rotor bearing; naturally cooling the gas turbine by atmosphere until the rotor can be turned by the turning machine; and further, the reason of sudden shutdown caused by high-working-condition operation is checked.

The invention provides a disposal method for a gas turbine after sudden shutdown in high-working-condition operation, which can reduce the damage degree to the minimum after the sudden shutdown in the high-working-condition. When the gas turbine is shut down under high working conditions, the gas turbine is required to be restarted in time under the condition of restarting, the starting process is ensured to be successful through fuel regulation, after the gas turbine is started successfully and enters a slow vehicle, the slow vehicle is cooled in operation, and then the gas turbine is shut down normally. When the condition of restarting is not met, cold blowing is carried out on the unit, when the rotor is blocked in the cold blowing process, the cold blowing is stopped, the lubricating oil of the rotor bearing of the gas turbine is always in a circulating state to cool the rotor bearing, and the atmosphere naturally cools the gas turbine until the rotor can be turned and coiled; and finally, checking the reason of sudden shutdown in high-working-condition operation.

Drawings

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

FIG. 1 is a flow chart of a method for handling a sudden shutdown in a high-speed operation of a gas turbine.

Detailed Description