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针对目前水能利用提高率计算中出力系数K值的选取方法会造成计算结果出现较大误差甚至错误的问题,将考核时段划分为n个分时段,每个分时段取一个K值,提出了K值分时段反向率定法,将其率定的结果应用于梯级水电站节水增发电考核中。结果表明,梯级各电站水能利用提高率计算结果均在合理范围内,同时与采用年均K值计算的结果进行比较,发现两者相差较大,且后者可能造成不合理的计算结果,由此得出K值分时段反向率定法的合理性和有效性。
Aiming at the problem that the K value of the output coefficient K in the calculation of the rate of improvement of water energy utilization causes a large error or even a wrong calculation result, the examination period is divided into n sub-periods and each sub-period takes a value of K, K value of the sub-period reverse rate method, the results of its rate set applied to cascade hydropower station in the assessment of water conservation. The results show that the calculation results of the rate of increase of hydropower utilization of cascades are within a reasonable range and compared with the results of using the average K value. The results show that the difference between the two is large, and the latter may result in unreasonable calculation results. From this, we can get the rationality and effectiveness of the method of determining the inverse ratio of K value in different periods.