CN-122014426-A - Method for checking feedback abnormality of rotatable guide vane of gas turbine

Abstract

The invention relates to a method for checking feedback abnormality of a rotatable guide vane of a gas turbine, which is characterized in that the conditions of single-cylinder alarm, double-cylinder alarm, non-alarm actual angle abnormality and the like are pointed out from a guide vane control principle, and classified checking is carried out through fault phenomenon analysis.

Inventors

• WEI CHANGMIAO
• WU YIMING
• LIU XUEBIN
• CAO CHUNRONG
• SHI ZHEN
• QU LINWEI
• LI JINQI
• CHEN YUE

Assignees

• 中国船舶重工集团公司第七0三研究所无锡分部

Dates

Publication Date

20260512

Application Date

20260324

Claims (9)

1. 1. A method for checking feedback abnormality of a rotatable guide vane of a gas turbine is characterized in that a linear relation between the angle of the guide vane and the extension length of an electric cylinder under the full working condition of the gas turbine under the normal operation condition is established, The linear relation is used as a test benchmark for checking, When the feedback of the rotatable guide vane of the gas turbine is abnormal, detecting whether the angle of the current guide vane and the extension length of the electric cylinder are in line with the linear relation, And according to the non-conforming factor, checking the component condition of the gas turbine, and adjusting the current guide vane angle and the extension length of the electric cylinder to conform to the linear relation.
2. 2. The method for detecting abnormal feedback of a rotatable guide vane of a gas turbine according to claim 1, wherein the method is applicable to the operation conditions of two electric cylinders.
3. 3. The method for checking feedback anomalies of rotatable guide vanes of a gas turbine according to claim 2, wherein the method is suitable for the following conditions of feedback anomalies of the rotatable guide vanes: in the first case, the extending length of the cylinder A corresponds to the instruction angle, the actual angle of the rotatable guide vane is correct and inconsistent with the feedback angle, In the second case, the extension length of the cylinder A is inconsistent with the instruction angle and consistent with the feedback angle, and the feedback angle of the cylinder B is consistent with the instruction of the GT control system, In the third case, the actual angle of the rotatable guide vane is between the corresponding angle of the extending length of the A cylinder and the feedback angle of the B cylinder, which is inconsistent with the instruction of the GT control system, the extending length of the A cylinder is inconsistent with the instruction of the GT control system, which is inconsistent with the feedback angle, but the instruction of the GT control system is consistent with the feedback, In the fourth case, the control system sends out feedback angles of the A cylinder and the B cylinder which are consistent with each other, And fifthly, the feedback angles and the extension lengths of the cylinder A and the cylinder B are consistent with the instruction of the GT control system, and the actual angles do not correspond to the instruction.
4. 4. The method for detecting abnormal feedback of a rotatable guide vane of a gas turbine according to claim 3, wherein in the first case, abnormal condition of an angle feedback transmission channel from a guide vane control cabinet to a GT control system is detected.
5. 5. The method for checking abnormal feedback of a rotatable guide vane of a gas turbine according to claim 3, wherein in the second case, if the actual angle of the rotatable guide vane is between the feedback angle of the A cylinder and the feedback angle of the B cylinder, checking the guide vane control cabinet to the command channel of the A cylinder, checking the abnormal condition of the motor of the A cylinder and checking the locking factor of the brake of the A cylinder, And if the actual angle of the rotatable guide vane is consistent with the instruction of the GT control system, checking the abnormal condition of the instruction channel from the guide vane control cabinet to the A cylinder and the abnormal condition of the A cylinder motor.
6. 6. The method for checking feedback anomalies of rotatable guide vanes of a gas turbine according to claim 3, wherein in case three, the anomalies of the position transmission device inside the cylinder A are checked.
7. 7. The method for detecting feedback anomalies of rotatable guide vanes of a gas turbine according to claim 3, wherein in case four, the anomaly of a command channel from a GT control system to a guide vane control cabinet is detected.
8. 8. The method for checking abnormal feedback of rotatable guide vanes of a gas turbine according to any one of claims 4, 5, 6 and 7, wherein the cylinder A is any one of two electric cylinders.
9. 9. The method for detecting feedback anomalies of rotatable guide vanes of a gas turbine according to claim 3, wherein in case five, the mechanical transmission mechanism of the rotatable guide vanes is detected to be anomalies.

Description

Method for checking feedback abnormality of rotatable guide vane of gas turbine Technical Field The invention relates to the technical field of marine gas turbines, in particular to a method for checking feedback abnormality of a rotatable guide vane of a gas turbine. Background The gas turbine is used as high-speed rotary power equipment, is widely applied to the aspects of power generation, industrial driving, ship power and the like, has strong nonlinearity when being used as a key part of the gas turbine, and has good performance directly influencing the operation efficiency of the gas turbine. The inlet guide vane is used as a static blade of the inlet of the compressor, and the angle of the inlet guide vane is changed by electric cylinder driving to control the air quantity entering the gas turbine. Once the system fails, it is often prone to gas turbine downtime, resulting in personnel and economic losses. However, during the use process, the faults are mainly reflected by abnormal feedback of the rotatable guide vanes of the gas turbine, so that a method for rapidly troubleshooting the faults and recovering the stable operation of the gas turbine is needed. Disclosure of Invention Aiming at the defects in the prior art, the application provides a method for checking feedback abnormality of a rotatable guide vane of a gas turbine, which can quickly check faults and recover stable operation of the gas turbine. The technical scheme adopted by the invention is as follows: a method for checking feedback abnormality of a rotatable guide vane of a gas turbine establishes a linear relationship between the angle of the guide vane and the extension length of an electric cylinder under the full working condition of the gas turbine under the normal operating condition, The linear relation is used as a test benchmark for checking, When the feedback of the rotatable guide vane of the gas turbine is abnormal, detecting whether the angle of the current guide vane and the extension length of the electric cylinder are in line with the linear relation, And according to the non-conforming factor, checking the component condition of the gas turbine, and adjusting the current guide vane angle and the extension length of the electric cylinder to conform to the linear relation. The method is suitable for the working conditions of two electric cylinders. The method is suitable for the situation that feedback abnormality of the rotatable guide vane occurs as follows: Case one: the extending length of the A cylinder corresponds to the instruction angle, the actual angle of the rotatable guide vane is correct and inconsistent with the feedback angle, In the second case, the extension length of the cylinder A is inconsistent with the instruction angle and consistent with the feedback angle, and the feedback angle of the cylinder B is consistent with the instruction of the GT control system, In the third case, the actual angle of the rotatable guide vane is between the corresponding angle of the extending length of the A cylinder and the feedback angle of the B cylinder, which is inconsistent with the instruction of the GT control system, the extending length of the A cylinder is inconsistent with the instruction of the GT control system, which is inconsistent with the feedback angle, but the instruction of the GT control system is consistent with the feedback, In the fourth case, the control system sends out feedback angles of the A cylinder and the B cylinder and gives out abnormal alarm, the feedback angles of the A cylinder and the B cylinder are consistent, And fifthly, the feedback angles and the extension lengths of the cylinder A and the cylinder B are consistent with the instruction of the GT control system, and the actual angles do not correspond to the instruction. In the first case, the abnormal condition of the angle feedback transmission channel from the guide vane control cabinet to the GT control system should be checked. In the second case, if the actual angle of the rotatable guide vane is between the feedback angle of the A cylinder and the feedback angle of the B cylinder, checking the abnormality of the guide vane control cabinet to the instruction channel of the A cylinder and the abnormality of the motor of the A cylinder, checking the locking factor of the A cylinder brake, And if the actual angle of the rotatable guide vane is consistent with the instruction of the GT control system, checking the abnormal condition of the instruction channel from the guide vane control cabinet to the A cylinder and the abnormal condition of the A cylinder motor. And in the third case, the abnormal condition of the internal position transmission device of the A cylinder is checked. The cylinder A can be any one of two electric cylinders. And in the fourth case, the abnormality of the instruction channel from the GT control system to the guide vane control cabinet is checked. And fifthly, checking the abnormality of the me