Pumped storage power station and new energy power generation combined optimal scheduling method and device

Abstract

The invention provides a pumped storage power station and new energy power generation combined optimal scheduling method and device, and belongs to the technical field of power grid and energy storage system scheduling. The method comprises the steps that a pumped storage power station and new energy stations connected with the pumped storage power station serve as a combined system, and a new energy station day-ahead generated power relative prediction error scene set is established; under the scene set, a combined system pre-scheduling model containing pumped storage power stations and new energy power generation is established and solved, and the start-stop state of each pumped storage unit at each moment in the next day and the water storage of upper and lower reservoirs at each moment in the next day in each scene are obtained; and iterative optimization is conducted on the water storage of the upper and lower reservoirs to obtain an optimal scheduling scheme for combined power generation of the pumped storage power station and the new energy stations. According to the invention, an optimal solution method is provided for solving the problem that the water head change generates nonlinear influence on the power and the flow during the scheduling of the pumped storage power station, and a more accurate pumped storage power station and new energy power generation combined optimal scheduling scheme can be obtained.

Description

technical field [0001] The present disclosure relates to the technical field of power grid and energy storage system dispatching, and in particular to a method and device for optimal dispatching of pumped storage power stations combined with new energy generation. Background technique [0002] In recent years, the transformation of my country's energy structure has accelerated, and the scale of renewable energy access has continued to increase. Under the new situation, the power grid has put forward higher requirements for the access of large-scale new energy stations and the transmission of new energy power generation. Due to the large volatility of new energy power generation, there are certain difficulties in the process of dispatching new energy. Therefore, it is very necessary to consider using a power supply with a certain adjustment capability in conjunction with new energy sources to improve the dispatchability of new energy sources. [0003] Based on the current te...

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Problems solved by technology

This disclosure proposes an optimal solution method for the problem of non-linear effects of water head changes on power and flow during the dispatching process of pumped storage power plants, and provides a more accurate optimal dispatching scheme for pumped storage power plants combined with new energy power generation compared with the assumption of constant water head

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