Operation simulation models are developed for monthly and daily time steps for computing the hydroelectric energy and its financial benefits in an economic life by three different operation policies: steady-rate, three-shift and pumped-storage rules. The pump is operated during the night and consumes low-cost energy. The resulting computer programs, three on monthly and three on daily steps, are applied to the Yamula dam – which is a fairly large dam generating energy, located in the Inland Anatolia region of Turkey – over a period of 35 years using the gauged daily stream flows and daily pan evaporations. The results indicate that the pumped storage is more profitable than the other two rules aside from the intangible benefits of regulating the within-day fluctuations of demand for electrical energy. Another result is that both the average annual energy and the financial benefits given by the three rules computed by the monthly time steps are about 1−2% greater than those given by the daily time steps. This study is the first one comparing all these three operation schemes quantitatively in a realistic way both in monthly and daily time steps.

中文翻译：

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按月和日时间步长研究三种不同的水电运行规则

开发了运行模拟模型，用于每月和每天的时间步长，以通过三种不同的运行策略来计算经济生活中的水电能源及其财务收益：稳定费率，三班制和抽水蓄能规则。该泵在夜间运行，消耗低成本能量。由此产生的计算机程序（按月进行三个步骤，按日执行三个步骤）被应用到Yamula大坝，这是一个相当大的大坝，位于土耳其内陆安纳托利亚地区，在35年的时间里使用每日测得的水流发电流量和每日锅蒸发。结果表明，抽水蓄能除了调节电能需求的日内波动带来的无形收益外，还比其他两个规则更有利可图。另一个结果是，由每月时间步长计算出的三个规则所给出的平均年能量和财务收益都比每天时间步长给出的约高1-2％。这项研究是第一个以现实的方式在月度和每日时间步长上定量比较所有这三种操作方案的研究。