System for improving flexibility of thermal power plant by using steam energy accumulator

The utility model discloses a system for improving the flexibility of a thermal power plant through a steam energy accumulator. The system comprises a high-pressure cylinder, a second high-pressure heater, the steam energy accumulator, a second low-pressure heater and a first low-pressure heater. A steam exhaust port of the high-pressure cylinder is divided into two paths, one path is communicated with the shell side of the 2 # high-pressure heater, and the other path is communicated with a steam inlet of the steam energy accumulator through a steam energy accumulator check valve, a steam energy accumulator inlet electrically operated gate and a manual valve in sequence; an outlet of the steam energy accumulator is divided into two paths, one path is communicated with the shell side of the second low-pressure heater, the other path is communicated with the shell side of the first low-pressure heater, and the system can achieve lower-load operation of the unit, improve the variable load rate of the unit, impro