Active power rolling scheduling method for photo-thermal power station-wind power plant combined system

Abstract

The invention relates to an active power rolling scheduling method for a photo-thermal power station-wind power plant combined system and belongs to the technical field of operation and control of electric power systems. Firstly, historical prediction data and historical actual active power data of a wind power plant and a photo-thermal power station light field are subjected to statistics, and a relation curve between the historical prediction data and the historical actual active power data is established; according to the relation curve, an active power scene set of the wind power plant and the photo-thermal power station light field in the next 48 hours is generated; according to the scene set and the electricity selling price of an actually accessed power grid, the planned value of output active power of the photo-thermal power station-wind power plant combined system in the next 24 hours is calculated; the combined system executes the calculated planned value of the output active power in the time scale of the next 24 hours. With the adoption of the method, the problem of fluctuation of power of the wind power plant in the photo-thermal power station-wind power plant combined system is solved, and grid connection of renewable energy sources is promoted.

Description

technical field [0001] The invention relates to a rolling dispatching method for active power of a solar-thermal power station-wind farm combined system, belonging to the technical field of power system operation and control. Background technique [0002] With the rapid development of renewable energy power generation in recent years, the photothermal power generation technology that converts solar energy into thermal energy has once again attracted people's attention. According to the International Energy Agency, with the support of appropriate policies, the cumulative installed capacity of global CSP will reach 980GW in 2050. At present, there are CSP power station projects under construction in Zhangjiakou, Qinghai and other places in China. [0003] The solar thermal power station uses thermal energy to generate steam to drive the steam turbine to generate electricity. When the solar thermal power station is combined with the heat storage device, the controllability and...

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Problems solved by technology

The energy in the heat storage device in the solar-thermal power station can be stored for a long time with relatively low loss. If the joint system does not consider the uncertainty of the wind and solar power in the next few days and the change in the dispatchability of the solar-thermal power station when formulating the plan ahead of the day, It is impossible to formulate a reasonable charge and discharge plan for the heat storage device to fully utilize the dispatchability of the solar thermal power station, thereby affecting the economic benefits of the combined system on a longer time scale

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