随机动态规划水力发电“El Infiernillo”大坝的运行政策

IF 0.2 Q4 WATER RESOURCES
M.L. Arganis Juárez , R. Mendoza Ramírez , R. Domínguez Mora , E. Carrizosa Elizondo
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引用次数: 1

摘要

这项工作涉及制定大坝的运行规则,考虑到Comisión联邦电力运营商的要求,除了在Comisión国家水电公司施加的限制之间找到平衡,一方面保证水力发电的最大利益,另一方面保证最低的泄漏和赤字情况,以避免对下游站点造成损害。这个问题可以通过应用数学优化模型来解决,该模型使用了用于此目的的几种方法。本文采用随机动态规划算法对“El Infiernillo”水电系统的运行规律进行了分析和模拟,该方法已在墨西哥几个重要的水电站大坝系统中应用了近二十年。使用的目标函数是使发电效益最大化,在系统溢出或赤字的情况下施加惩罚,并在上导曲线或下导曲线可能超过其极限时增加惩罚。这些引导曲线有助于协调运营商组织,在极端水文气象事件发生时设置安全水坝蓄水量的上限,以管理为目的,并设置下限,以保证系统的最小水力发电量。该算法在不同情况下的应用,提出了不同的惩罚值,得到了用数据表表示的最优操作规则。这些规律是用1965年至2013年两周的历史流入量来模拟的。在模拟所选择的时间间隔内的抽取量,可以由操作员根据大坝的储水量,借助抽取值表,简单地确定出来;此外,在模拟过程中,考虑到前一时间间隔的流入量,通过增加或减少指定的流入量,相对于前同一时间间隔的平均历史流入量,引入了自相关的影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Políticas de operación de la presa «El Infiernillo» para generación de hidroelectricidad con programación dinámica estocástica

This work deals with getting operating rules for a dam which take into account the Comisión Federal de Electricidad operator's requests, besides to find a balance between the restrictions imposed by Comisión Nacional del Agua, in order to guarantee on the one hand, the biggest benefits for hydropower generation and on the other hand the lowest spill and deficit scenarios to avoid damages in downstream sites. This problem can be solved by applying a mathematical optimization model using several methodologies for this purpose.

In this analysis operating rules were obtained and simulated, for the hydropower system “El Infiernillo” using a stochastic dynamic programming algorithm, this method has been applied since almost two decades in several important hydropower dam systems in Mexico. The objective function used was to maximize the generation benefits, imposing penalties in case of spill or deficit in the system and also adding penalties when an upper or lower guide curve could be overtopped on their limits, these guide curves help to reconcile the operator organizations by setting with an upper level the safe dam storage volume for management purposes in case of extremes hydrometeorogical events and with the lower limits a minimum hydropower generation can be guaranteed in the system. With the application of the algorithm in several occasions proposing different penalty values, optimum operating rules expressed as a data table were obtained. Such rules where simulated with the fortnight inflow historical volume to the Dam from years 1965 to 2013.

The extraction volume in the time interval chosen for the simulation can be decided in a simply way by the operator helped with an extraction values table according to the storage in the dam; besides is incorporated, during the simulation, the effect of the inflow volume autocorrelation by adding or subtracting a specified volume taking into account the inflow magnitude from the previous time interval, with respect to the mean historical inflow volume in the same previous time interval.

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