A novel operation chart for cascade hydropower system to alleviate ecological degradation in hydrological extremes
A novel operation chart for cascade hydropower system to alleviate ecological degradation in hydrological extremes
复制标题
缓解水文极端生态退化的梯级水电系统新型运行图
DOI：
10.1016/j.ecolmodel.2018.05.025
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发表时间：
2018-09-24
影响因子：
3.1
通讯作者：
Quan, Jin
中科院分区：
文献类型：
--
作者：
Ding, Ziyu;Fang, Guohua;Quan, Jin
结合有限的生态曲线，提出了一种新的多目标水电系统运行图优化方法，该方法能够改善发电量和整体生态条件，缓解极端干旱或潮湿条件下的生态退化。该方法主要包括：(1)在物理生境模拟模型(PHABSIM)的基础上，利用加权可用面积-流量曲线确定最优生态流量；(2)建立以发电量和总生态条件最大化为目标的运行图优化模型，并用DPSA进行求解；(3)求出有限的生态曲线，并将其合并到运行图中。以中国西南部袁河的贾萨江(JS)和马都山(MDS)水库为例进行了实例研究。结果表明，优化调度图可使马德逊水库的发电量分别提高1.72%和5.99%，生态保护程度分别提高0.27%和1.13个百分点。此外，JS水库的生态破坏频率从6.11%降至1.11%，JS和MDS水库的生态破坏频率分别由26.67%降至3.89%。通过对一阶马尔可夫模型生成的随机径流时间序列的进一步讨论，证实了该运行图的适应性。证实了该运行图的可行性和潜在的应用前景。
Incorporating limited ecological curves, a novel operation chart optimization method is proposed for the multipurpose hydropower systems, which is capable of improving power generation and overall ecological condition and alleviating ecological degradation under extreme dry or wet conditions. The method mainly includes: (1) determine the optimal ecological discharge using weighted usable area-discharge curve based on the physical habitat simulation model (PHABSIM); and (2) establish the operation chart optimization model aiming to maximizing power generation and overall ecological condition and solve the model with DPSA; then (3) derive the limited ecological curves and incorporate them in the operation chart. A case study is performed with Jasajiang (JS) and Madushan (MDS) reservoirs on the Yuan River in southwestern China. The results show that the optimized operation charts result in a 1.72% and 5.99% increase in hydropower generation and a 0.27% and 1.13% increase in ecological conservation degree for MDS reservoir, respectively. In addition, the frequency of ecological damage is reduced from 6.11% to 1.11% for JS reservoir and from 26.67% to 3.89% for JS and MDS reservoirs, respectively. A further discussion using a time series of random runoff generated by first-order Markov model has confirmed the adaptability of this operation chart. The feasibility and potential applications of this operation chart has been confirmed.