Optimization control method based on mechanical ventilation rate of long vertical enclosed bus

Abstract

The invention discloses an optimization control method based on a mechanical ventilation rate of a long vertical enclosed bus (IPB). The mechanical ventilation rate V inside the long vertical enclosed bus, a temperature difference deltaT between IPB inlet and outlet, and heat source strength q satisfy a relation: V=a1+a2*deltaT+a3*q+a4*deltaT<2> +a5*q<2>+a6q*deltaT, wherein a1 is a first coefficient, a2 is a second coefficient, a3 is a third coefficient, a4 is a fourth coefficient, a5 is a fifth coefficient, and a6 is a sixth coefficient. The optimization control method verifies a result that the long vertical enclosed bus (IPB) has an optimal ventilation rate through mechanical ventilation when meeting the requirements of heat balance and temperature through numerical calculation and field test data. Through optimal calculation of the mechanical ventilation rate, the temperature different requirement can be ensured, the energy consumption of selected ventilation equipment is ensured to be minimal, and the purpose of saving energy is achieved. The research results of the optimization control method for the mechanical ventilation rate of the long vertical enclosed bus have great significance for finding the optimal mechanical ventilation rate for heat balance of an IPB vertical shaft and achieving the energy saving and emission reduction purposes on the premise of satisfying the IPB operating environment.

Description

technical field [0001] The invention belongs to the electromechanical technical field of water conservancy and hydropower engineering, and specifically refers to an optimal control method based on the mechanical ventilation of a long vertical closed bus bar. Background technique [0002] The temperature distribution and heat dissipation of long vertical closed busbars in large underground power stations are the guarantee for the safe operation of busbars. With the rapid development of domestic hydropower projects, long vertical isolated phase-enclosed bus bars (IPB) are more and more widely used in underground hydropower stations. In the past, the main cooling method relied on natural ventilation. With the increase of the rated heat flow rate of the long vertical closed busbar of the underground power station and the complexity of the layout, whether natural ventilation alone still meets the heat balance requirements of IPB needs to be judged after specific calculations. Wh...

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Problems solved by technology

[0005] In order to solve the problem that the current large-scale underground power station IPB cannot fully meet the heat dissipation requirements by relying on natural convection, and how to correctly select the heat balance method and the optimal ventilation volume, the present invention provides a mechanical ventilation volume based on long vertical closed busbars that can quickly and accurately correct deviations. Optimal control method

[0007] V=a 1 +a 2 *ΔT+a 3 *q+a 4 *ΔT 2 +a 5 *q 2 +a 6 q*ΔT

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