Steam heat storage and release system and method for heat supply network

The invention discloses a heat supply network steam heat storage and release system and method. The system comprises a heat supply network steam heat source, a plurality of heat users, a steam compressor, a phase change heat storage device, a pressure reducing valve, a low-pressure heater, a condensation water storage tank, a water supply booster pump, a connecting pipeline and an auxiliary valve. Efficient and high-quality heat storage and release of heat supply network steam are achieved through cascade utilization of the steam compressor, the phase change heat storage device and the low-pressure heater. On one hand, cascade heat storage of steam is achieved through the phase change heat storage device and the low-pressure heater in the heat storage process, steam parameters are increased through the steam compressor so as to increase the latent heat release temperature, and heat storage of the steam is accelerated. And on the other hand, stable release of heat energy is achieved through the phase change he