基于三段洪水特征的调洪增发电量计算方法

充分应用水电站的调蓄特点可以合理利用洪水增加发电效益,但没有统一有效的洪水增发效益评价方法,为此,根据洪水涨落过程特点,提出一种基于三段洪水特征的调洪增发电量(PGIOFD)的概念与计算方法.根据水位及流量的涨落特征将场次洪水过程划分为涨水段、洪峰段和退水段3个阶段;分别按水位不变、按预想出力、按均匀降库容3种规则对三...

Calculation method of power generation increase on flood dispatching based on three-period flood characteristics

It can reasonably use flood to increase power generation benefit by fully applying the characteristics of reservoir regulation of hydropower station, but there is no uniform and effective assessment method for additional power generation benefit of flood, for which, according to the characteristics of flood ebbing and flowing process, the concept and calculation method of PGIOFD(Power Generation Increase On Flood Dispatching) are proposed based on three-period flood characteristics. According to the ebbing and flowing characteristic of water level and flow, a flood process is partitioned into three periods of water level rising period, flood peak period and water level falling period. The power generation of three periods are calculated according to three rules of constant water level, expected output and uniform storage capacity reduction, and the benchmark process and power generation without optimization measures are determined. The power generation is compared with practical dispatching power generation to get the PGIOFD. Taking 29 floods of Dahuashui power station in Wujiang River from 2008 to 2018 as examples, and results show that resou-rces of 26 floods are fully used with the cumulative PGIOFD of 128.38 GW·h, which verifies that the proposed method can be effectively applied to flood process analysis and flood dispatching evaluation.