Control device and method for detecting and eliminating fan stall
A technology of a control device and a control method, applied in pump control, pump device, mechanical equipment, etc., can solve problems such as the deterioration of the working condition of the boiler air and smoke system and the return of the fan to normal, so as to ensure the operation safety, restore normal operation, improve The effect of reliability
Pending Publication Date: 2020-04-10
ZHEJIANG ZHENENG TECHN RES INST
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Problems solved by technology
However, in the current control strategy, there is no method and criterion that can accurately judge the fan stall condition. Under this condition, the automatic control loop of the unit will continue to control the fan output in a closed-loop manner, and continuously increase the
But in fact, because the fan operation is in an unstable stall area, blindly increasing the fan command will not restore the fan to normal, but may cause further deterioration of the working condition of the boiler air-smoke system
Method used
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Embodiment
[0043] Since fan stalls should be avoided as far as possible in the actual operation of the generator set, the effectiveness of the present invention is verified in the form of signal simulation tests, and the configuration and simulation tests are carried out on the Emerson OVATION decentralized control system. This control system is widely used in various industrial control systems. , the simulated value does not necessarily agree with the parameters of various fans, and it is only for verification test reference. The simulation test is mainly aimed at triggering the stall signal of the fan. The test steps are as follows:
[0044] 1) Before starting the simulation test, first set the value of each variable. The operating current signals of the A and B fans are first simulated as 200A, the maximum deviation of the fan current is set to 80A, and the outlet wind pressure signals of the A and B fans are simulated as 11kPa, the wind pressure deviation limit is set to -2kPa, two fa...
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The invention relates to a control device and method for detecting and eliminating fan stall. The method comprises the steps of (1) judging fan stall conditions; (2) judging the fan stall if all judging conditions in the step (1) are met; and (3) continuously adjusting the fan exertion according to related controlled quantity parameters. When two fans are operated side by side and both automatically operated, and one fan stalls, the fan stall can be accurately judged through monitoring of the related controlled quantity parameters, and the fan exertion is reasonably adjusted to relieve or eliminate the stall working conditions to improve the boiler operation reliability. The control device and method can be applied to a boiler air smoke system applying double rows of fans. The control device and method can accurately judge the fan stall working conditions when the fan stalls to quickly change the automatic control mode of the fan system; and the fan exertion is reasonably adjusted to facilitate elimination of the fan stall influence, to recover normal operation of the air smoke system and to guarantee the boiler operation safety.
Description
technical field [0001] The invention relates to the field of wind turbine stall elimination, and particularly includes a control device and method for detecting and eliminating wind turbine stall. Background technique [0002] As an important part of the boiler equipment, the fan is mainly responsible for delivering air, pulverized coal to the furnace and maintaining the pressure of the furnace. Therefore, the normal operation of the fan is very important to the safety of the boiler operation. At present, the fans of the boiler are generally configured in double rows, and two fans of the same type maintain the normal operating parameters of the furnace at the same time to ensure the air volume requirements of the unit. The main fan equipment in the boiler system includes the blower fan, the induced draft fan and the primary fan, and the equipment involved also includes fan auxiliary equipment, such as damper baffles, air ducts, adjustable actuators, measuring transmitters a...
Claims
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Login to View More IPC IPC(8): F04D27/00F04D25/16
CPCF04D27/001F04D27/00F04D25/166
Inventor 胡伯勇童小忠何郁晟陆陆钟文晶沈雪东李恩长陆豪强张文涛
Owner ZHEJIANG ZHENENG TECHN RES INST