Circulating water system optimization method based on permanent magnet adjustment and mechanical ventilation

Abstract

The invention provides a circulating water system optimization method based on permanent magnet adjustment and mechanical ventilation, and the method comprises the steps: setting the permanent magnet adjustment initial opening degree of a permanent magnet adjustment circulating water pump and the initial starting number of fans of a mechanical ventilation cooling tower; establishing a permanent magnet regulation circulating water pump power consumption characteristic model, a condenser heat exchange characteristic model, a mechanical ventilation cooling tower heat exchange and power consumption characteristic model and a steam turbine back pressure-to-steam turbine power influence model; taking the maximum actual increased power of the steam turbine as an objective function, optimizing the objective function by utilizing a genetic algorithm, and obtaining the permanent magnet regulation opening degree of the permanent magnet regulation circulating water pump and the number of started mechanical ventilation cooling tower fans corresponding to the maximum value of the objective function, so as to complete the optimization of the circulating water system. According to the method, the influence factors of the economical efficiency of the circulating water system are comprehensively analyzed, the analyzed factors fit 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 specifically, relates to a method for optimizing a water circulation 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. It is an important auxiliary system of the thermal power unit and has an important impact on the economy of the steam turbine. The change of the back pressure of the condenser 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...

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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 mech

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