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The optimal power generation operation of a hydropower station for improving fish shelter area of low TDG level
Ecological Engineering ( IF 3.8 ) Pub Date : 2020-03-01 , DOI: 10.1016/j.ecoleng.2020.105749
Hang Wan , Jilong Li , Ran Li , Jingjie Feng , Zhifeng Sun

Abstract Supersaturated TDG problem has become a serious potential threat to aquatic life on dammed rivers. With the aim to mitigate the impact of supersaturated TDG and improve the fish shelter area, the optimal power generation operation of a hydropower station was explored. In order to consider the TDG mixing process of the tailwater and the spill discharge, a two-dimensional supersaturated TDG transport diffusion model was established. The simulation result of the model was validated by the monitored field data of Xiangjiaba (XJB) hydropower project. Different scheduling schemes of the power generation and spill of Xiluodu (XLD) (upstream of XJB project) and XJB projects were simulated to investigate the TDG distribution downstream of XJB. Based on the simulation results, fish shelter areas of different scheduling schemes were analyzed. Simulation results showed that the generation scheduling of XJB could be optimized in order to expand the fish shelter area. First of all, the powerhouses on both sides for XJB project are recommended to operated as far as possible. In the event of the powerhouse alternatives have to be made between the left powerhouse and right powerhouse, the powerhouse on the right side is recommended due to minor low TDG area. The results show the high significance and practical value of identifying the fish shelter area against the impact of supersaturated TDG under different schemes of power generation and provide vital information for fish protection downstream of a high dam.

中文翻译:

某水电站优化发电运行改善低TDG鱼群面积

摘要 过饱和TDG问题已成为对筑坝河流水生生物的严重潜在威胁。以减轻过饱和TDG的影响,改善鱼群栖息地面积为目标,探索了某水电站的最优发电运行方式。为了考虑尾水和溢油排放的TDG混合过程,建立了二维过饱和TDG输运扩散模型。通过向家坝(XJB)水电项目现场监测数据验证了模型的模拟结果。模拟了溪洛渡(XLD)(XJB项目上游)和XJB项目的不同发电溢流调度方案,研究XJB下游的TDG分布。根据仿真结果,分析了不同调度方案下的避鱼区。仿真结果表明,可以优化XJB的生成调度,以扩大避鱼区。首先,建议XJB项目两侧的厂房尽量运行。如果需要在左厂房和右厂房之间进行厂房替代,由于较小的低 TDG 区域,建议使用右侧的厂房。研究结果表明,在不同发电方案下,确定鱼类避风区抵御过饱和TDG的影响具有重要意义和实用价值,为高坝下游鱼类保护提供重要信息。建议XJB项目两侧电厂尽量运行。如果需要在左厂房和右厂房之间进行厂房替代,由于较小的低 TDG 区域,建议使用右侧的厂房。研究结果表明,在不同发电方案下,确定鱼类避风区抵御过饱和TDG的影响具有重要意义和实用价值,为高坝下游鱼类保护提供重要信息。建议XJB项目两侧电厂尽量运行。如果需要在左厂房和右厂房之间进行厂房替代,由于较小的低 TDG 区域,建议使用右侧的厂房。研究结果表明,在不同发电方案下,确定鱼类避风区抵御过饱和TDG的影响具有重要意义和实用价值,为高坝下游鱼类保护提供重要信息。
更新日期:2020-03-01
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