Independent fused salt heat storage power plant

Abstract

An independent fused salt heat storage power plant belongs to the technical field of energy storage, and comprises a power supply, an electric fused salt heater, a high-temperature hot salt tank, a low-temperature cold salt tank, a fused salt pump, a fused salt circuit system, a brine heat exchanger, a conventional power generation island, a water-steam circuit system and an intelligent control system. When unstable or redundant electric energy such as photovoltaic power, wind power and off-peak power is stored, the electric energy is converted into high-temperature heat energy to be stored in the high-temperature fused salt through heating the high-temperature fused salt by the electric fused salt heater. When electricity utilization is needed, high-temperature heat energy stored in the high-temperature fused salt can heat water to generate water steam to drive a steam turbine to generate power to realize the energy release. In addition, a large-scale high-temperature thermal storage power plant built in cities can also be combined with city heat supply to construct a large-scale high-temperature heat storage and combined heat and power supply station.

Description

technical field [0001] The invention relates to an independent heat storage power station system, in particular to an independent heat storage power station system using mixed molten salt as a heat storage working fluid, and belongs to the technical field of energy storage. Background technique [0002] According to my country's "12th Five-Year Plan for Renewable Energy Development", by 2020, the installed capacity of wind power and solar energy will reach 200 million kW and 50 million kW respectively. However, the inherent intermittency and volatility of renewable energy such as wind energy and solar energy have a great impact on the power grid, resulting in a high proportion of wind power and photovoltaic power generation not connected to the grid in my country, and severe wind / solar abandonment. For example: in 2011, the unconnected rate of wind power in my country reached 28%; the unconnected rate of photovoltaic power reached 29%; The average rate of wind abandonment is...

AI Technical Summary

Problems solved by technology

In addition, in order to meet the requirements of power load, the current installed capacity of power generation and grid capacity are built according to the maximum demand. As the peak-to-valley difference of the power grid increases day by day, it will inevitably lead to the shutdown or low-load operation of generator sets during off-peak power consumption, and Waste of grid capacity

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