Energy storing type power generating system

Abstract

The invention provides an energy storing type power generating system. The system comprises a heat storing unit and n (n is not less than 2) expansion heat exchange units, wherein the heat storing unit comprises a high-temperature heat storing device and a low-temperature heat storing device which communicate with each other and are stored with heat storing mediums; the n expansion heat exchange units are connected in series, each comprising a heat exchange device and an expansion device which are connected in series; when in energy releasing, compressed air sequentially flows through each expansion heat exchange unit and is heated by the corresponding heat exchange device through the heat storing medium, and then the heated compressed air is charged into the corresponding expansion device to act; when in energy releasing, the heat storing medium in the high-temperature heat storing device is charged into the heat exchange devices of any m expansion heat exchange units to exchange heat, the heat storing medium discharged by the heat exchange devices of the m expansion heat exchange units are charged into the heat exchange devices of the rest n-m expansion heat exchange units to exchange heat, wherein m is more than or equal to 1 and is less than n; the heat storing medium in the high-temperature heat storing device can transfer heat twice, so that the stored heat of the heat storing medium in the high-temperature heat storing device can be fully utilized.

Description

technical field [0001] The invention relates to the technical field of energy storage, in particular to an energy storage power generation system. Background technique [0002] At present, the proportion of new clean energy sources such as wind power and solar photovoltaics connected to the grid is getting higher and higher. However, clean energy often has intermittent or poor stability factors. For example, wind power is affected by various environmental factors. During the period of high load demand on the grid, the reliability of wind power is poor, but it may generate a large amount of power that is difficult for the grid to absorb during low load periods. . Therefore, in many areas of our country, there are problems of abandoning wind, abandoning light and limiting electricity, which is not conducive to the development of renewable energy in our country. However, if the electric energy wasted in the phenomenon of abandoning wind and light is stored, and when the peak ...

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Problems solved by technology

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the defects of insufficient heat storage and utilization of heat storage working medium in existing energy storage power generation systems

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