Intelligent temperature control dam and temperature control method

Abstract

An intelligent temperature control dam, comprising a dam body, a real-time induction machine, a decision support system and a fast regulating machine, wherein the fast regulating machine comprises anindustrial control computer, a plurality of temperature compensation sources, a variable topology pipe network and a wireless base station, and the variable topology pipe network comprises a pluralityof grid multi-pass control units; The decision support system comprises an intelligent decision machine, a rule generation system, a knowledge base, a model base and a database stored on a decision support system server. The invention also provides a temperature control method of an intelligent temperature control dam. The invention grids the temperature control pipeline of the dam and introducesthe grid node, thereby improving the flexibility and pertinence of the temperature control of the dam. Moisture transfer equation and heat transfer equation are introduced to quantify the specific effect of humidity on dam temperature, which improves the accuracy of temperature control. Predicting the disadvantageous factors of dam temperature control in advance, changing the traditional passivetemperature control mode into active temperature control mode, reduces the uncertainty of dam temperature control.

Description

technical field [0001] The invention belongs to the field of water conservancy and hydropower project construction and the temperature control of concrete dam project operation, and specifically relates to a method of gridding dam concrete for temperature control, and is especially suitable for concrete intelligent temperature control during the construction period of concrete dams and dam operations regulation. Background technique [0002] With the rapid development of my country's national economy, the development of hydropower in areas rich in water resources such as the central east and southwest has gradually become more perfect, and the development and planning of national water conservancy and hydropower projects have shifted to the northwest region. The advancement of technology has made it no longer a problem to build high concrete dams in Northwest China. However, due to the complex climate conditions in Northwest my country, cold and dry winters, and large temper...

AI Technical Summary

Problems solved by technology

However, the water temperature cannot be adjusted at any time. The water source is usually the river water where the project is located. When the water temperature is low, a temperature gradient is likely to occur. Especially for projects in the severe cold regions of Northwest my country, this temperature gradient is larger and the stress generated is also greater.

[0014] (2) The traditional main measure to deal with the cold wave and reduce the internal and external temperature gradient is to cover the thermal insulation layer. This measure passively responds to changes in the external temperature. In the long run, it cannot effectively reduce the temperature stress of the dam body, and the harsh external environment may even lead to surface insulation. spalling of material;

[0015] (3) The existing temperature control technology mainly relies on manual adjustment. Not only does the measurement and manual adjustment have a time lag, but there may be human factors that cause inaccuracy and miss the best temperature control time.

[0016] (4) The hysteresis of the control nodes of the current temperature control measures needs to be passively controlled after the unfavorable factors affecting the concrete temperature of the dam appear, which is often prone to out-of-control concrete temperature and lacks the prospective of temperature control

[0017] (5) The current temperature control measures cannot target the variability of the temperature field in the dam concrete, and accurately control the temperature of specific parts in a regional and targeted manner

[0018] (6) The current temperature control measures are still mainly passive, and at the same time, more seasonal temperature changes form specific countermeasures, which have a certain lag and lack of predictability and cannot be protected in advance

[0019] (7) The current calculation of temperature stress and design of temperature control measures for concrete dams basically only involves the heat conduction and heat transfer properties of concrete, and the dam concrete humidity field, the coupling of temperature field and humidity field, and the coupling of multiple fields such as stress field The problem has not been given enough attention

The authorized announcement number "ZL 2016 1 1116913.5" discloses the "method and device for permanently regulating the temperature of concrete dams", breaking the traditional method of regulating the temperature of concrete dams, and controlling the feasibility of temperature control of concrete dams from the framework Provides an idea, but for the time being, it only conducts simple verification in the laboratory stage, has not been put into engineering practice, and lacks the means of intelligent regulation

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