Design method of low-noise cut-off tube for valve tower cooling system of UHV converter station

Abstract

The invention discloses a low-noise intercepting pipe design method of an ultrahigh pressure convertor station valve tower cooling system. The method comprises the following steps: obtaining cooling power of a valve tower, determining the diameter of a main cooling water pipe of a single valve tower, calculating the flow rate of water flow in the main cooling water pipe, determining the number and diameters of branch water cooling water pipes in each valve group, determining the diameter of an intercepting pipe in a short connection pipe at the tail end of the main cooling water pipe, and performing flow rate distribution analysis of cooling water in the short connection pipe to observe the occurrence position of the turbulent flow; continuously adjusting the length and the chamfer angle of the intercepting pipe, repeating the flow rate distribution analysis in the intercepting pipe, and obtaining an intercepting pipe structure with relatively low turbulent flow degree. By adoption of the low-noise intercepting pipe design method disclosed by the invention, the design of the intercepting pipe of the ultrahigh pressure convertor station valve tower cooling system is regulated, by means of the design of the length and the chamfer angle size of the intercepting pipe, the turbulent flow state of the water flow in the intercepting pipe is reduced, thereby effectively reducing the noise level during the operation of the intercepting pipe, and preventing the influence of abnormal noise to the health of the operators.

Description

technical field [0001] The invention relates to the improvement of the valve hall cooling system of a converter station, in particular to a design method for a low-noise cut-off pipe of the valve tower cooling system of an ultra-high voltage converter station. Background technique [0002] The valve hall in the UHV converter station is generally composed of 6 sets of valve towers. The valve tower is mainly composed of valve group, shielding cover and valve tower cooling system. The valve group in the UHV converter station will generate a lot of heat during rectification and filtering, and the valve tower cooling system is required to dissipate it. The cooling system of the valve tower mainly consists of the main water inlet pipe, the main water outlet pipe, the branch water pipe and the short connection pipe at the end. deteriorating. Such as figure 1 As shown, above the terminal short connection pipe 1 is the cutoff pipe 2. The function of the cutoff pipe 2 is to control...

AI Technical Summary

Problems solved by technology

At present, due to common design flaws in the interceptor pipes in the water cooling system operated on site, the local turbulent flow of the interceptor pipes not only affects the heat dissipation effect of the cooling water, but also leads to high operating noise. The long-term high-noise level working environment is likely to be harmful to the physical and mental health of operators. cause adverse effects, resulting in anxiety

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