The invention discloses a solar steam direct
power generation system with a heat storage function. The solar steam direct
power generation system comprises a heat collection subsystem, a heat storage subsystem and a power generation subsystem. Under
irradiation conditions in the
daytime, high-temperature and high-pressure saturated steam enters the inner
pipe side of a sleeve type line focusing
solar heat collector, and low-temperature
molten salt enters the sleeve side. Focusing
solar energy firstly heats the
molten salt, and the steam is heated to an overheated state after the temperature rise of the
molten salt. Part of the overheated steam enters a high-pressure
storage tank for heat storage, and the rest of overheated steam enters the power generation subsystem for power generation. Meanwhile, the molten salt enters a high-temperature molten salt tank for heat storage. Under
irradiation-free conditions in the nighttime, the molten salt in the high-temperature molten salt tank enters a low-temperature molten salt tank after heat release by an overheater; the high-pressure saturated steam flows out from the high-pressure
storage tank and is heated by the overheater to form overheated steam to enter the power generation subsystem for power generation. The solar steam direct
power generation system disclosed by the invention realizes the all-weather power generation by adopting a solar steam direct power generation technology through taking water / steam as not only a working medium but also a main heat storage medium and as an auxiliary heat storage medium with coordinate application of the small amount of molten salt.