Cascade hydropower station energy storage scheduling method considering photovoltaic access condition

Abstract

The invention discloses a cascade hydropower station energy storage scheduling method considering a photovoltaic access condition, and the method comprises the steps: considering the influence on a key control water level after the cascade hydropower station is connected with a photovoltaic system, and determining the key control water levels under different incoming water levels; determining energy storage boundaries of a flood season and a dry season of the cascade reservoir, and respectively establishing a flood season energy storage scheduling model and a dry season energy storage scheduling model; solving flood season and dry season energy storage scheduling models under different incoming water conditions, and drawing a cascade energy storage scheduling graph; and performing cascade energy storage control by applying the cascade energy storage scheduling graph, and determining a cascade energy storage control process and a power station power generation operation strategy. A long-term water level control mode in water-light complementary scheduling is determined, and the capacity competition risk of a conveying channel is reduced; the flood season scheduling model and the dry season scheduling model are respectively constructed, the energy storage control process of the cascade water-light complementary system under different incoming water conditions is determined, the cascade energy storage control process and the power station power generation operation strategy are determined to guide the actual operation of the cascade hydropower station, and the benefits of the water-light complementary system in a long time are ensured.

Description

technical field [0001] The invention belongs to the technical field of energy comprehensive utilization, and in particular relates to an energy storage scheduling method for cascade hydropower stations considering photovoltaic access conditions. Background technique [0002] The core idea of ​​the complementary scheduling of photoelectricity and hydropower is that the electricity generated by the wind power plant is connected to the grid through the grid-connected line of the hydropower station, and the randomness and intermittency of the hydropower are adjusted by hydropower, so as to stabilize the impact of wind power instability and output on the power grid, and solve the problem of large-scale wind power centralized grid connection. It is an innovative and exploratory mode of development and operation of renewable energy to eliminate difficult problems and improve the level of comprehensive utilization of clean energy. [0003] In the hydro-photovoltaic hybrid system, du...

AI Technical Summary

Problems solved by technology

At present, most of the studies on mid- and long-term dispatching of water-solar hybrid systems aim at the maximum power generation, and do not fully consider the risk of power curtailment.

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