Solar thermal dynamic energy storage system

Abstract

The invention relates to an energy storage system, in particular to a solar thermal dynamic energy storage system, belonging to the technical field of energy storage. The solar thermal dynamic energy storage system comprises a solar collecting system, a compressed energy storage system and a thermal power expansion system, wherein a photovoltaic power generation device can generate electricity to drive a high-pressure compressor to work, external electric energy can drive the high-pressure compressor and a low-pressure compressor to work through a power grid of a power station, and an expansion machine can swell to generate electricity to release energy. According to the energy storage system, the valley electric energy of the power grid of the power station and residual electric quantity generated through daytime solar photovoltaic power generation can be stored, the solar photovoltaic power generation and sunshine thermal power stored heat power generation can be fully utilized, thereby improving the utilization efficiency of energy, lowering the power generation cost and increasing the economic benefit.

Description

technical field [0001] The invention relates to an energy storage system, specifically a solar thermal power energy storage system, which belongs to the technical field of energy storage. Background technique [0002] In recent years, the number of large units in my country's power grid has continued to increase, the power system's own power regulation capacity has been limited, and the peak-to-valley ratio of social power loads has continued to increase. The power sector has to build traditional power generation capacity according to the maximum load requirements. Caused a large amount of surplus and waste of power generation capacity. Therefore, there is an urgent need for an economical, reliable, and efficient power system and a matching power energy storage system. [0003] The power energy storage system has evolved into one of the most important bottlenecks restricting the large-scale utilization of renewable energy. At present, countries around the world regard the d...

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Problems solved by technology

However, the traditional compressed air energy storage system is not an independent technology, it must be used in conjunction with gas turbine power plants, and cannot be suitable for other types, such as wind and solar power plants

Especially not suitable for my country's energy strategy that no longer advocates gas-fired power generation

Moreover, its combustion still produces pollutants such as nitrogen compounds, sulfides and carbon dioxide, which does not meet the requirements of green and renewable energy development.

Due to the low energy storage density, the compressed air energy storage system also requires specific geographical conditions to build a large gas storage room, which greatly limits the application range of the compressed air energy storage system

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