Black-start system of wind-light-fire-storage combined operation system

The utility model discloses a black-start system for a wind-solar-fire storage combined operation system. The black-start system comprises a new energy AC micro-grid, a power transmission unit, a load unit and a thermal power generation unit. The new energy alternating current micro-grid is connected with the thermal power generation unit through the power transmission unit, the new energy alternating current micro-grid is connected with the load unit, and the new energy alternating current micro-grid comprises a photovoltaic unit, a wind power unit and an energy storage unit; the utility model further discloses a black start method of the wind-light-fire-storage combined operation system, rated values of voltage amplitude and frequency of the alternating current bus are set as reference values, and closing of the grid-connected switch is controlled according to whether the voltage amplitude and frequency of the output side of the new energy alternating current micro-grid reach the reference values or not. 本实