An optimization method of circulating water system based on permanent magnet regulation and mechanical ventilation

Abstract

The invention provides a method for optimizing a circulating water system based on permanent magnet adjustment and mechanical ventilation. The initial opening of permanent magnet adjustment circulating water pump and the initial opening number of mechanical ventilation cooling tower fans are set, and the power consumption of the permanent magnet adjustment circulating water pump is established. Characteristic model, condenser heat exchange characteristic model, mechanical ventilation cooling tower heat exchange and power consumption characteristic model, steam turbine back pressure influence model on steam turbine power; the objective function is optimized by using the genetic algorithm with the maximum actual increased power of the steam turbine as the objective function , when the maximum value of the objective function is obtained, the corresponding permanent magnet adjustment circulating water pump permanent magnet adjustment opening and the number of mechanical ventilation cooling tower fans are opened to complete the optimization of the circulating water system. The invention comprehensively and comprehensively analyzes the factors influencing the economy of the circulating water system, the analyzed factors conform to the actual production, the optimization effect is better, and the operation mode of the circulating water system is more economical.

Description

technical field [0001] The invention relates to the field of water system circulation optimization, and more particularly, to a method for optimizing a circulating water system based on permanent magnet regulation and mechanical ventilation. Background technique [0002] The cold end system of a thermal power plant is mainly composed of the low pressure cylinder of the steam turbine, the condenser and the circulating cooling water system. The change of the condenser back pressure will lead to the change of the heat consumption and power generation of the steam turbine. Increasing the vacuum of the condenser can reduce the ideal specific enthalpy of the steam turbine and increase the power generation. The operating characteristics of the system are closely related. The circulating water system refers to the pipelines and equipment that make up the circulating water flow. The optimal operation mode of the circulating water system is studied, and the optimization module of the...

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Problems solved by technology

[0005] In order to overcome the disadvantages of single and idealized considerations in the optimization of the circulating water system in the prior art, which leads to poor optimization results, the present invention provides a circulating water system optimization method based on permanent magnet adjustment and mechanical ventilation, considering mechanical ventilation cooling towers The combined effect of the permanent magnet regulating circulating water pump on the circulating water system optimizes the circulating water system, and the consideration factors fit the actual production, which improves the optimization effect and makes the operating mode of the circulating water system more economical

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