Grid-connected wind-light combined power generation system and power generation method thereof

Abstract

The invention discloses a grid-connected wind-light combined power generation system which comprises a wind power generator set, a solar photovoltaic array, a detecting device (11), an electrical storage device (12) and a master control device (13), wherein the wind power generator set and the solar photovoltaic array are respectively connected into an electric network; when the sum of the output power generated by the wind power generator set and the solar photovoltaic array is larger than the fluctuation range of the output power required by the electric network, the electrical storage device (12) is controlled to store electric energy by the master control device (13); and when the sum of the output power is smaller than the fluctuation range of the output power required by the electric network, the electrical storage device (12) is controlled to release the electric energy by the master control device (13). In the working process of the grid-connected wind-light combined power generation system, a supplementary power generator set is used for generating power, and the power of the power generation system transmitted to the electric network is adjusted in real time by the electrical storage device (12) according to the size of the output power, so that the power output to the electric network from the power generation system is more stable, thereby the power supply stability of the power generation system is improved, and the power supply quality of the electric network is ensured.

Description

technical field [0001] The invention relates to the technical field of power generation systems, in particular to a grid-connected wind-solar combined power generation system. The invention also relates to a grid-connected wind-solar combined power generation method. Background technique [0002] With the outbreak of the energy crisis worldwide, renewable energy sources such as wind power and solar energy have been more and more widely used, thus driving the development of wind power generation systems and solar power generation systems. [0003] Power generation systems are generally divided into off-grid systems and grid-connected systems. The off-grid system is not associated with the power grid, operates independently, and has a small power generation. It is mainly used for power supply in remote areas, islands and other places where the power grid cannot radiate, and its application range is relatively limited. After the generator of the grid-connected system generate...

AI Technical Summary

Problems solved by technology

[0005] Due to the large number of users of large-scale power grids, the requirements for the stability and security of power supply are high, and the wind resources and sunlight resources are both intermittent and volatile, making the above-mentioned wind-solar combined power generation system unable to be applied on a large scale In the grid-connected power generation system, it limits the application range of the wind-solar combined power generation system

Even if the wind-solar combined power generation system is applied to the grid-connected system, due to the intermittent and fluctuating characteristics of wind resources and sunlight resources, it will affect the stability of the grid and reduce the power supply quality of the grid.

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