Рябенко, О. А. та Сунічук, С. В. та Філіпович, Ю. Ю. та Riabenko, O. A. та Sunichuk, S. V. та Filipovych, Y. Y. (2018) ОПТИМІЗАЦІЯ ГІДРАВЛІЧНОГО РЕЖИМУ РОБОТИ ВОДОПРИЙМАЧА МИГІЇВСЬКОЇ ГЕС. Вісник Національного університету водного господарства та природокористування (2(82)). с. 36-45.

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Анотація

У статті наведено результати моделювання гідравлічних умов ро- боти водоприймача Мигіївської гідроелектростанції. Методом ЕГДА побудована гідродинамічна сітка руху відкритого потоку в аванкамері для різних варіантів роботи донних отворів. На основі аналізу кінематичної структури потоку надані рекомендації щодо оптимальної конструкції споруди.

Title in English

OPTIMIZATION OF THE HYDRAULIC REGIMES OF WATER INTAKE OF MYHIIVSKA HPP

English abstract

The article gives the modelling of hydraulic condition of water-intake operating of Myhiivska hydropower plant. The hydroelectric complex consists of powerhouse, rockfill dam with concrete mantle of upstream and downstream face, and spillway dam with rubblework on cement mortar with level of crest. These structures are situated in the left arm (which is the largest) of the Southern Buh river, however, existed structurer do not block arm completely. Main demands of water users to operating regimes of Myhiivskyy hydroelectric complex are maintenance of hydrological river regime close to natural and guarantee the passing of minimum flows with value of ecological flows during low-flow period of dry year. Myhiivska SSHP is used for electricity production and does not influence on making daily and seasonal flow regulation of the r. Southern Buh. Water intake is situated in the ice-protective wall. Ice-protective wall is made of rubblework and is built along all powerhouse downstream view distantly. Before flowing into forebay, water passes through 5 openings of ice-protective wall. The hydraulic conditions of forebay operating has been complicated due to the process of redistribution of water masses along the width of the forebay and the possible formation of eddy currents with vertical axis of rotation that influences on generating units operating of HHP negatively. Because of this, it is needed to reduce the water flow that passes through generating units of power plant, consequently capacity and electricity production decrease as well. It was made the modelling of hydraulic condition of structure operating by electrohydrodynamical analogy method for different bottom openings operating and carried out the hydraulic calculation of flow capacity. This method involves the model creation from some electric conductive material, usually geometrically similar to real part of fluid motion for making the hydrodynamical grid from equipotential lines and flow lines. After combining the flow lines and equipotential lines, the hydrodynamical grid of flow motion was received, according to which it was determined all necessary flow characteristics: backpressure and velocity at any domain of motion, and flows. Based on analysis of kinematic scheme of flow, the recommendations of optimal construction of water intake of Myhiivska hydropower plant were given.

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