Air cooled condenser unit with optimized operation

Abstract

The invention relates to an air-cooled condenser unit with optimized operation, comprising: an air-cooled condenser, which has a heat exchange tube bundle and fan equipment, the heat exchange tube bundle is configured to receive exhaust steam from a steam turbine, and the fan equipment is matched with the heat exchange tube bundle arranged to cool the exhaust steam flowing in the heat exchange tube bank into condensed water; a data measurement and acquisition system configured to measure and acquire at least part of the controlled variables and disturbance variables of the air-cooled condenser; a multivariable predictive controller, It is based on pre-set modular units, and automatically controls the control variables of the fan equipment according to the values ​​of at least part of the controlled variables and disturbance variables from the data measurement and acquisition system to optimize the performance of the air-cooled condenser while preventing the back pressure of the steam turbine from being lower than the set value The range of pressure protection limits and prevent the condensate temperature from falling below the predetermined limit of condensate temperature.

Description

technical field [0001] The invention relates to an air-cooled condenser unit with optimized operation, and more particularly, to an air-cooled condenser unit with optimized operation based on multivariable predictive control. Background technique [0002] In plant installations, steam in a steam turbine undergoes an expansion process that converts heat energy into mechanical energy that can be used, for example, to generate electricity in a generator or to drive a compressor. The condenser used in the steam turbine is a heat exchange device that turns the steam discharged after driving the steam turbine into condensed water. The condensed water discharged from the condenser is sent to the boiler through the condensed water pump through the feed water heater, feed water pump, etc., and is heated by the boiler to form steam and sent to the steam turbine, so as to ensure the continuous progress of the entire thermal cycle. [0003] The unit that directly uses air as the coolin...

AI Technical Summary

Problems solved by technology

However, due to the fact that the traditional PID controller is a hysteresis regulation in essence, there are many deficiencies in the control quality of the PID control system.

[0006] Because the traditional coping strategies or control methods are too rough, it is easy to cause excessive power consumption of fans and unnecessary waste, and it is prone to violent fluctuations in operating parameters, resulting in instability and reduced reliability of the entire air-cooling system

Not least of all, it is not possible to keep the air cooling system running optimally all the time

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