Control method of generator set and related equipment

Abstract

The embodiment of the invention discloses a control method of a generator set and a related device. The control method is used for increasing the pressure of a hearth when the generator set performs RB action. The method comprises the steps that if it is monitored that the generator set triggers the auxiliary machine fault load reduction RB function, the type of the RB function is obtained, and the type of the RB function comprises at least one of a primary air fan RB, a water feeding pump RB and an air feeder RB; the active power of the generator and the preset static blade opening value of the induced draft fan are obtained; according to the type of the RB function, a target static blade opening degree calculation mode of the induced draft fan is determined; calculating the active power of the generator and a preset static blade opening value of the induced draft fan according to the target static blade opening calculation mode to obtain a target static blade opening value of the induced draft fan; and the target static blade opening value is sent to a static blade executing mechanism of the induced draft fan, and the target static blade opening value is used for the static blade executing mechanism to reduce the static blade opening of the induced draft fan according to the target static blade opening value so as to improve the hearth pressure.

Description

technical field [0001] The embodiments of the present application relate to the technical field of automatic control of thermal power generating sets, and in particular, to a control method of a generating set and related equipment. Background technique [0002] The RB (RUNBACK) function is the load reduction function of auxiliary equipment failure, which mainly refers to the sudden partial loss of the main 6KV auxiliary equipment capacity of the unit, that is, after the actual active power of the generator is greater than the power generation capacity of the generator set equipment, the generator set control system automatically and quickly reduces the generator. Active power to achieve a new balance of functions. Among them, auxiliary equipment mainly includes steam-driven water supply pump unit, blower fan, primary fan and frequency conversion induced draft fan. [0003] In order to reduce the power consumption rate of the thermal power plant, the power plant carried out...

AI Technical Summary

Problems solved by technology

[0005] 1. In the frequency conversion mode of the induced fan, due to the inherent characteristics of the frequency converter of the induced fan, the raising / lowering rate of the frequency converter of the induced fan is limited.

[0006] 2. When the blower RB operates, the frequency converter of the induced draft fan decreases relatively slowly. At this time, the stationary blade actuator of the induced draft fan is generally in the manual mode, which is not good for the control of the furnace pressure, and the furnace pressure is prone to be too low.

[0007] 3. After the primary fan RB operates, the air volume entering the furnace decreases sharply, and the frequency converter of the induced draft fan cannot be quickly overridden and turned off, so that the RB function cannot be successfully put into operation, making it difficult to maintain the negative pressure of the furnace, which quickly drops to "low pressure in the boiler furnace" state, causing the boiler chamber to trip to the protection value, causing the main fuel of the boiler to be interrupted (MFT, main fuel trip), the boiler is turned off, and the generator set is shut down

[0008] 4. When the feed water pump RB operates, because the fuel is cut off quickly, the induced draft fan frequency converter cannot realize fast overriding, which affects the parameter control in the RB process

[0009] Therefore, under the frequency conversion mode of the induced draft fan in the prior art, when RB occurs in the generator set, the parameter control in the RB process will be affected, resulting in too low furnace pressure

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