Due to the intermittent, fluctuating and unpredictable factors of new energy power generation, large-scale power access will inevitably increase the difficulties of power grid regulation, and may cause large scale of energy abandon. Adding energy storage system in the power generation side can solve these problems. The energy that can not be consumed can be stored and released when the power generation is insufficient or the power consumption peak is high, so as to smooth the power generation and utilization, make up for the defects of unstable power generation and avoid waste.