Feeding control method and device for feed water heating system of thermal power plant

Abstract

The invention provides a feeding control method and device for a feed water heating system of a thermal power plant. The method comprises the steps that whether the water side of the feed water heating system meets a second feeding condition or not is judged after it is determined that the feed water heating system meets a first feeding condition; after the water side of the feed water heating system meets the second feeding condition, feeding of the water side of the feed water heating system is controlled, and a water side feeding result is obtained; when the water side feeding result is successful feeding, whether the steam side of the feed water heating system meets a third feeding condition or not is judged; and after the steam side of the feed water heating system meets the third feeding condition, steam side feeding of the feed water heating system is controlled, and a steam side feeding result is obtained. According to the feeding control method and device, automatic feeding ofthe feed water heating system of the thermal power plant can be achieved.

Description

technical field [0001] The invention relates to the technical field of power system control, in particular to a method and device for input control of a feedwater heating system in a thermal power plant. Background technique [0002] At present, the feedwater heating system in a thermal power plant includes a low-pressure heating system and a high-pressure heating system. Among them, the low-pressure heating system uses the steam that has done part of the work in the steam turbine to pump it into the heater to heat the condensate, increase the temperature of the condensate, and reduce the discharge to The amount of steam in the condenser reduces energy loss and improves the cycle efficiency of the thermal system. The high-pressure heating system can increase the feed water temperature of the unit, reduce the heat transfer loss of the boiler, and improve the operating efficiency of the unit. Therefore, the input of the feed water heating system is essential for the units tha...

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Problems solved by technology

Therefore, the input of the feed water heating system is essential for the units that operate normally under load. At present, the input of the feed water heater system in thermal power plants still needs to be manually input by the operators based on their own experience, but the input of the feed water heater The start-up work is relatively complicated. Once there is an error in the start-up step, it will cause the load oscillation of the unit, and more seriously, it may cause non-stop of the unit or damage to the power plant equipment.

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