A method and system for continuous optimal control of wet-cooled steam turbine operating back pressure

An optimized control and steam turbine technology, applied to mechanical equipment, engine components, machines/engines, etc., can solve the problems of time-varying factors that are easy to change and difficult to measure directly, achieve ideal practical results, accurately predict changes in energy consumption, The effect of good adaptability

Active Publication Date: 2017-03-15
北京互嘉联盟科技中心(有限合伙)
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Problems solved by technology

[0019] Time-varying factors are prone to change and are often difficult to measure directly

Method used

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  • A method and system for continuous optimal control of wet-cooled steam turbine operating back pressure
  • A method and system for continuous optimal control of wet-cooled steam turbine operating back pressure

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Embodiment Construction

[0119] The principles and features of the present invention are described below in conjunction with the accompanying drawings, and the examples given are only used to explain the present invention, and are not intended to limit the scope of the present invention.

[0120] Such as figure 1 As shown, it is a method for continuously optimizing the operation back pressure of a wet-cooled steam turbine described in Embodiment 1 of the present invention, which specifically includes the following steps:

[0121] Primary model building steps: building a hydraulic model of the cold source system;

[0122] Establish the pressure head model and power model of the circulating water pump group with the operating mode parameters of the circulating water pump group as independent variables;

[0123] Establish a condenser model for determining the relationship between the cooling medium flow rate, the cooling medium inlet and outlet temperature and the condenser saturation temperature;

[0...

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Abstract

The invention relates to an operation back pressure continuous optimized control method and system for a wet cooling steam turbine. The method includes the steps that a primary model is built; a hydraulic model of a cold source system is built; a pressing head model and a power model are built; a condenser model is built; a time-varying factor model is built; a secondary model is built; a back pressure model is built; a steam turbine heat rate model used for determining the relation between the steam turbine cycling heat rate and generator unit back pressure is built; control is optimized, under the condition of current power generation power, according to the power model, a back pressure module and the heat rate model, cold source power consumption and fuel consumption of different cold source operation modes are calculated, and an optimal solution of cold source optimized control is obtained. The method and system completely break through substantive technical barriers of the background technology, key technologies of vacuum continuous optimized control of a large power plant steam turbine set are completely achieved for the first time, the historical subject is solved, and an ideal application effect is achieved in practice.

Description

technical field [0001] The invention relates to a continuous optimization control method and system for wet-cooled steam turbine operation back pressure, which belongs to the field of optimal control of condensing steam turbine cycles in large-scale thermal power generation processes such as coal-fired, gas-fired and nuclear energy, especially the operation back pressure of wet-cooled steam turbines or Optimal control of the vacuum field. Background technique [0002] The cooling system of the steam turbine circulating condenser of a large wet-cooled generating set is the cold source system. The cooling medium, that is, the circulating water, is delivered through a parallel water pump system driven by multiple motors and equipped with a frequency converter for speed regulation. Therefore, a large amount of water is consumed electrical energy. When equipped with a frequency converter, or the water pump itself has the ability to adjust the flow, the cold source system can con...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01D21/00G06F17/50F28B11/00
CPCY02E60/00
Inventor 王砧
Owner 北京互嘉联盟科技中心(有限合伙)
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