Author(s): Zhang Yan; Wang Xiang; Ruan Yanyun; Liu Xiaoyang; Zhang Bohan; Wang Heyu

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Keywords: Multiple power grids; Load curves; Output allocation scheme

Abstract: The southwest region is the most abundant area of hydropower resources in China, with a number of large-scale hydropower stations built. These hydropower stations, as the backbone power sources of the “West-East Power Transmission”, mostly undertake complex cross provincial and cross regional power transmission tasks. They need to respond to the load demands of multiple power grids simultaneously. This paper applies the dimensionality reduction approach based on the characteristics of load curves to make a relatively reasonable output allocation scheme that can balance the peak shaving demands of multiple power grids and the benefits of cascade hydropower stations. The constructed model aims to maximize the benefits of cascade hydropower stations. This paper constructs the typical output curves based on the flat-to-peak ratio and valley-to-peak ratio to reduce the dimensionality of the solution. The flat-to-peak ratio and valley-to-peak ratio of the output curves of different hydropower stations in different provinces that maximize cascade benefits are determined through optimization algorithms. The case results demonstrate that the obtained output allocation schemes can simultaneously respond to the different peak shaving demands of different power grids.

DOI:

Year: 2024