Photovoltaic and photo-thermal combined power generation active power coordination control method and device

Abstract

The invention relates to a photovoltaic and photo-thermal combined power generation active power coordination control method and device. The method comprises the steps of determining an active power instruction value of a photovoltaic power station and an active power instruction value of a photo-thermal power station according to active power required by a load; correcting the active power instruction value of the photovoltaic power station and the active power instruction value of the photo-thermal power station based on the ultra-short-term prediction power of the photovoltaic power station and the correction value of the power up / down peak margin of the photo-thermal power station; and controlling the active power output of the photovoltaic power station to be the active power instruction value of the corrected photovoltaic power station, and controlling the active power output of the photo-thermal power station to be the active power instruction value of the corrected photo-thermal power station. According to the technical scheme provided by the invention, the active power output of each photovoltaic power station grid-connected inverter and each photo-thermal power station steam turbine generator unit is controlled, so that the optimal scheduling of photovoltaic and photo-thermal combined power generation is facilitated, the light abandoning rate of photovoltaic power generation is reduced, the output power of solar photovoltaic and photo-thermal combined power generation is stable, and the safe and stable operation of a power grid is ensured.

Description

technical field [0001] The invention relates to the technical field of solar power generation, in particular to a method and device for coordinated control of active power of photovoltaic-photothermal combined power generation. Background technique [0002] In recent years, with the global warming and the gradual depletion of fossil energy such as coal and oil, there is an urgent need for new renewable energy to replace traditional power generation methods. As solar energy is one of the cleanest and most direct energy sources in the field of renewable energy in the world today, rational planning and utilization of solar power generation is an important measure to achieve the goal of "energy saving and emission reduction". [0003] At present, solar power generation is mainly divided into two methods: photovoltaic power generation and photothermal power generation. Due to the change of solar irradiance, the photovoltaic power generation output is random and intermittent, and ...

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Problems solved by technology

[0003] At present, solar power generation is mainly divided into two methods: photovoltaic power generation and photothermal power generation. Due to the change of solar irradiance, the photovoltaic power generation output is random and intermittent, and the power abandonment rate is relatively high, which increases the uncertainty of power grid operation. and insecurity, it cannot meet the demand of the grid for active power; while solar thermal power generation can improve the stability of output, but solar thermal power generation faces the problems of large investment cost and high kWh cost

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