Supercritical Bretton and organic Rankine combined cycle solar power generation system

The invention discloses a supercritical Bretton and organic Rankine combined cycle solar power generation system. The system comprises a solar thermal collector, a medium and low temperature thermal storage system, a supercritical Bretton cycle system and a medium and low temperature organic Rankine cycle system. The supercritical Bretton cycle system comprises a Bretton cycle multistage turbine power generation system, a Bretton cycle regenerator, a precooler and a compressor. The medium and low temperature organic Rankine cycle system comprises an organic Bretton cycle heater, an organic Rankine cycle turbine, an organic Rankine cycle regenerator, a condenser and an organic working medium pump. According to the supercritical Bretton and organic Rankine combined cycle solar power generation system, the solar thermal collecting temperature and the thermal efficiency are high, in addition, the problem that solar energy time distribution is not even can be effectively solved, and meanwhile the thermal storage temperature is low.