Power plant optimization control system and method based on heat dissipation measurement of air cooling system

Abstract

The invention discloses a power plant optimization control system and method based on the heat dissipation measurement of an air cooling system. The system includes: an air cooling radiator assembly, a real-time heat transfer measurement subsystem of the radiator assembly, a dynamic operating characteristic analysis subsystem of a generator set, Air cooling system operation optimization subsystem and data transmission and data display subsystem. Based on the principle of non-contact infrared measurement, the invention avoids the damage of the traditional contact temperature measuring device to the surface of the radiator assembly of the air cooling system and the interference to the temperature field of the surface of the radiator assembly. At the same time, compared with the traditional thermocouple temperature measurement method, the measurement The system does not need external cables, which improves the economy of the measurement platform; it is more flexible and convenient during the measurement process, and can measure a larger area of ​​the radiator component of the air cooling system, effectively improving the efficiency of the measurement.

Description

technical field [0001] The invention relates to the fields of thermal detection and operation optimization of power plants, in particular to a power plant optimization control system and method based on heat dissipation measurement of an air cooling system. Background technique [0002] Power plant cooling systems are an important part of generating sets. There are two main types of cooling systems in thermal power plants according to different cooling media, one is the wet cooling system using water as the cooling medium, and the other is the air cooling system using ambient air as the cooling medium. Compared with the conventional wet cooling system, the air-cooling system can save more than 3 / 4 of water. Due to the resource characteristics of rich coal and little water in our country, the air-cooled generator set has a significant development advantage in our country. [0003] The air cooling system of power plants is divided into two ways: indirect air cooling and direc...

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Problems solved by technology

[0004] Although the above two air-cooling systems measure the temperature of relevant key positions, there are many factors that affect the heat transfer characteristics and operating characteristics of the air-cooling system, especially the unit load, sunlight angle and intensity, ambient temperature, ambient humidity, and wind speed around the air-cooling tower. Under the influence of factors such as wind direction and the degree of dirt on the surface of the air-cooled radiator components, the operating performance of the air-cooled condenser will change significantly

In turn, the following problems frequently occur: frequent changes in unit back pressure; limited unit load during high temperature periods in summer; increased antifreeze pressure during low temperature periods in winter; unreasonable operation mode of the air cooling system, high plant power consumption rate; frequent cleaning of heat exchange components of the air cooling system unreasonable

In this case, if the heat flux distribution and real-time heat dissipation of the air-cooling system cannot be measured in real time, the influence of the above factors cannot be clarified by the relevant temperature measurement alone, and precise operation optimization control cannot be carried out. Ultimately, precise control cannot be achieved The purpose of energy saving and emission reduction under

[0005] At present, there is still a lack of simple and real-time monitoring methods for the real-time heat flux distribution and real-time heat dissipation of the air-cooling system, resulting in the inability to directly obtain the direct correlation with the current operating load of the unit and external environmental factors, making the current optimal operation adjustment of the air-cooling system , winter antifreeze, load optimization, etc. cannot achieve precise dynamic control

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