Thermal generator set induced draft fan automatic paralleling method and system

Abstract

A thermal generator set induced draft fan automatic paralleling method is used for realizing automatic paralleling of a first induced draft fan and a second induced draft fan, and includes following steps: collecting working currents of the first induced draft fan and the second induced draft fan; calculating work current difference value of the first induced draft fan and the second induced draftfan, comparing the work current difference value with preset draught fan paralleling starting current difference value, and if the work current difference value is larger than the preset draught fanparalleling starting current difference value, starting a draught fan paralleling program, or else, continuously comparing the work current difference value with the draught fan paralleling starting current difference value; and controlling paralleling of the two induced draft fans according to the work currents of the first induced draft fan and the second induced draft fan and furnace draft. Thethermal generator set induced draft fan automatic paralleling method realizes the automatic paralleling of the induced draft fans, changes the situation that induced draft fan paralleling only can beperformed through manual operation in the prior art, performs the paralleling of the induced draft fans by simultaneously using the currents and the furnace draft as criteria, reduces the amount of preparation work before the paralleling, and meanwhile quickens the paralleling of the induced draft fans, and reduces the occurrence rate of faults.

Description

technical field [0001] The invention belongs to the field of thermal power generation, and in particular relates to a method and system for automatic paralleling of induced draft fans of thermal power generating sets. Background technique [0002] With the implementation of the ultra-low emission policy for thermal power generating units and the gradual increase in the capacity of new thermal generating units, the flue equipment at the tail of the boiler has increased, the resistance along the process has increased, and the electrical capacity of the induced draft fan has gradually increased. As a rotating machine, during the operation of the induced draft fan, it is inevitable that accidents such as single-side fan tripping and fan stalling will easily cause mismatching of the output of the two induced draft fans. [0003] At present, the juxtaposition of induced draft fans in thermal power plants is mainly done manually. In view of the different levels of operating personn...

AI Technical Summary

Problems solved by technology

As a rotating machine, during the operation of the induced draft fan, it is inevitable that accidents such as tripping of the fan on one side and stalling of the fan will easily cause the output of the two induced draft fans to not match.

[0003] At present, the juxtaposition of induced draft fans in thermal power plants is mainly done manually. In view of the different levels of operating personnel, and the process of paralleling large-capacity induced draft fans, it is more likely to cause abnormalities such as furnace negative pressure fluctuations, fan surges, and stalls. Even cause accidents such as boiler fire extinguishing and fan equipment damage

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