With the rapid development of international wind power technology and equipment, Wind power generation has become the most mature, the most large-scale development condition and the commercial development prospect of new energy technology. However, wind energy has a strong randomness and volatility, which makes the wind power penetration power of the access power grid fluctuates sharply. With the increase of wind power penetration, the cascade operation of wind farms brings a series of impacts to the power grid, which is enough to destroy the state of power system's economy, safety, stability and reliable operation, and make the operation and dispatching of power grid have special difficulties. In this paper, we analyse the economic impact of large-scale grid-connected wind capacity on power system, through cost analysis, error analysis, simulation unit allocation and scheduling, and finally propose the establishment of a wind energy storage system and seek the wind power system reserve optimization, to achieve a unified new energy maximum utilization and power system reliability.
