Optimal segmented efficiency in hydrosystem area equivalents to capture real production peaks

Abstract

Modeling large energy systems requires different forms of simplifications and aggregations. This is especially true for large hydropower systems. One way to simplify the modeling of hydropower as a part of large scale energy systems is to utilize so-called Equivalent models. The hydropower Equivalent model is a simplified hydropower area model with only one (or a few stations) which aims to mimic the behavior of an Original more detailed model containing all stations in a specific area. However, one drawback has been that the Equivalent model fails to match the highest production peaks of the real Original system. Methods to increase the maximum peaks in the Equivalent model have so far resulted in overall lower performance, where the production during lower peaks instead would be overestimated. Thus, in this paper, a method for computing hydrosystem area Equivalent models that not only have good average performance but also can capture the production peaks of the real hydropower system is developed. The new method allows for optimal partition and efficiency of different segments in the hydropower marginal production function.

Editorial: special issue on “Hydropower Scheduling”

“…The topic of short-term hydropower scheduling is addressed in [1][2][3][4][5][6]. A method based on homotopy is presented in [1], solving the short-term non-linear and multipurpose scheduling problem.…”

“…In [5] the impact of scenario tree generation and reduction methods on the solution of the short-term scheduling problem is quantified. Finally, [6] improves hydropower equivalents to better represent production peaks in the detailed hydropower systems.…”