RB control method for tripping of blower fan and suction fan of 200mw unit

Abstract

The invention discloses an air feeder and suction fan trip RB control method for a 200 MW unit. According to the method of enabling air feeder strip to enter RB control and the method of enabling suction fan trip to enter RB control based on working conditions, on-site equipment rapidly acts at the moment of auxiliary machine tripping. The adjustments that the blast capacity target value replaces the load value, override logic is set, and the lowest steady burning load ensures logic need to be adopted, system experiments are automatically adjusted in a large scale, adjustment parameters are adjusted, and the parameters are made to reach the steady state of the 50% unit capacity within about 10 min. By means of the method, RB control is successfully achieved on the 200 MW unit, and the problem that working condition interlock deterioration is caused by fan faults, and finally huge influences are caused by unit splitting on power supply and heating is avoided.

Description

technical field [0001] The invention belongs to the technical field of power generation equipment. Background technique [0002] RB (RUNBACK) is the rapid automatic load reduction control of the auxiliary equipment of the unit. The RB function of the unit is an important chain logic of the unit. It quickly reduces the load of the unit to the corresponding load of the auxiliary equipment that is still running after some auxiliary equipment faults trip in the thermal power plant. At present, RB function control has been realized on units with a capacity above 300MW in China. However, since 200MW units were generally put into operation at the end of the last century, the RB control method on 300MW units is not suitable for 200MW units due to its outdated system design concept and complicated equipment composition. . [0003] At present, the RB function cannot be successfully applied to the units below 200MW. After the expansion of the suction fan in our factory, the risk of t...

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Problems solved by technology

[0002] RB (RUNBACK) is the rapid automatic load reduction control of the auxiliary equipment of the unit. The RB function of the unit is an important chain logic of the unit. It quickly reduces the load of the unit to the corresponding load of the auxiliary equipment that is still running after some auxiliary equipment faults trip in the thermal power plant. At present, RB function control has been realized on units with a capacity above 300MW in China. However, since 200MW units were generally put into operation at the end of the last century, the RB control method on 300MW units is not suitable for 200MW units due to its outdated system design concept and complicated equipment composition.

[0003] At present, the RB function cannot be successfully applied to the units below 200MW

After the expansion of the suction fan in our factory, the risk of the equipment has increased. Once there is a problem with the fan, the operating conditions of the system cannot be saved by relying on personnel operations, which will lead to the occurrence of vicious events such as fire extinguishing and decommissioning of the unit. The reliability of the unit cannot be guaranteed and the stability of the power grid will be reduced.

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