Low overflow dam cave depot type hydropower station

Abstract

The invention relates to a low overflow dam cave depot type hydropower station. An low overflow dam is built at the upstream position of a river with an arc-shaped way; a water diversion tunnel cave depot of which the water diversion amount reaches or exceeds the annual average runoff of the river is built between the upstream position and the downstream position of the arc-shaped way of the river; the water inlet of the cave depot is positioned at the upstream position of the low overflow dam; a submerged front pool of which the top is lower than the body of the low overflow is built, or a channel of which the diameter is greater than that of the opening of the cave depot is built at the front end of the water inlet of the cave depot for water diversion from the cave depot, and a gate is built on the channel; a blocking wall body and a longitudinal water diversion pipeline are arranged at the water outlet tail end of the cave depot; the longitudinal water diversion pipeline is arranged in the blocking wall and used for connecting the cave depot with a water-turbine generator set outside the cave depot; the low overflow dam refers to that the dam body can be partially percolated by river water, part of the river water can overflow the top of the low overflow damp to flow downstreams in the high water period, and part of the river water seeps from the dam body and flows towards a dam body at the downstream position. The low overflow dam cave depot type hydropower station does not need to cut off the river, can be built on a river with a small or even very small head drop, further increases the utilization ratio of hydropower resources, and is low in construction difficulty.

Description

technical field [0001] The invention belongs to the technical field of hydropower stations. Background technique [0002] The traditional types of hydropower stations mainly include dam-type hydropower stations, diversion-type hydropower stations, and hybrid hydropower stations. The dam-type hydropower station is mainly built on the main stream of the river, and has the highest power generation efficiency. However, the construction of a dam to cut off the river often causes the downstream of the river to stop flowing, and the ecology is severely damaged. The reservoir area will also inundate a large amount of forest land, vegetation and even cultural relics and historic sites. Some species are facing survival crisis, and a large number of immigration problems are also involved. In addition, the mountains on both sides of the reservoir area are soaked in water and become soft, and the fluctuation of the water level can cause landslides, and large reservoirs may also induce ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the shortcomings of the existing hydropower station, to provide a hydropower station that does not need to cut off the river, avoids environmental damage and flooding of the reservoir area, and can be built in a river course with a small drop or even a small drop, so as to further improve the utilization of hydropower resources. rate, construction difficulty is relatively small, and the project cost is low for the environment-friendly cave-type hydropower station

Images