A control system and control method for a high-back pressure steam-driven feed pump for a large-scale generator set

Abstract

The invention belongs to the technical field of power generation engineering and control thereof, and particularly relates to a system and method for controlling a high back pressure steam feed pump of a large generator set. The system comprises a high back pressure steam feed pump set, an electric feed pump set, a condenser, a low-pressure heater, a steam header, a deaerator, a condensate pump, avacuum pump, a monitoring system, a pressure measuring device, a temperature measuring device, a flow measuring device, a pipeline and a valve. According to the system and method for controlling thehigh back pressure steam feed pump of the the large generator set, the number of the equipment is reduced, the operation efficiency of the equipment is improved, and the working capacity of the exhaust steam of a steam turbine driving the steam feed pump and the condensation of the exhaust steam are fully utilized to release the latent heat of vaporization, so that the energy utilization efficiency and the flexibility of the equipment control are improved.

Description

technical field [0001] The invention belongs to the technical field of power generation engineering and its control, and in particular relates to a control system and a control method for a high-backpressure steam-driven water feed pump of a large-scale generating set. Background technique [0002] Large-scale condensing steam turbine generator sets mostly adopt the boiler water supply mode of 2 steam-driven feedwater pumps + 1 electric feedwater pump. A single steam-driven feedwater pump can run a generator set that can carry 50% of the rated load, and two steam-driven feedwater pumps can run a generator set. It can carry 100% of the rated load, and the corresponding electric feed water pump unit can carry 30% or 50% of the rated load. This type of boiler water supply method has many equipments, a large amount of repair and maintenance work, and occupies the area of ​​the plant; the steam turbine driving the steam-driven feedwater pump has a small capacity and low efficienc...

AI Technical Summary

Problems solved by technology

This type of boiler water supply method has many equipments, a large amount of repair and maintenance work, and occupies the area of ​​the plant; the steam turbine driving the steam-driven feedwater pump has a small capacity and low efficiency, and its exhaust steam is directly discharged into the condenser, requiring the condenser capacity Large, correspondingly high investment

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