Molten salt energy storage system giving consideration to power generation and heat supply and operation mode of molten salt energy storage system

The invention relates to a fused salt energy storage system giving consideration to power generation and heat supply and an operation mode thereof.The fused salt energy storage system comprises an energy storage unit, an energy release unit and a water supply unit, and the energy storage unit comprises a low-temperature fused salt storage tank, a fused salt electric heater and a high-temperature fused salt storage tank which are connected together in sequence; the wire inlet end of the fused salt electric heater is connected with the low-voltage side wire outlet end of an energy storage buck converter; the energy release unit comprises a low-load preheater, a preheater, an evaporator, a steam pocket and a superheater which are sequentially connected together; the water supply unit comprises a drain tank, a high-pressure deaerator and a low-pressure deaerator, and the high-pressure deaerator is sequentially connected with a high-pressure heater A and a high-pressure heater B. The molten salt steam generation s