Abstract: Large-scale wind power integration will sharply increase the power system adequacy capacity cost due to the low capacity credit of wind power, which needs to be considered in power planning and operation. An analytical model and method of wind power adequacy capacity cost is proposed on the basis of an in-depth analysis of the impact mechanism of wind power integration on power system adequacy capacity. A wind power capacity credit calculation model is established based on the Effective Load Carrying Capability Algorithm and an adequacy capacity cost calculation model was established based on capacity credit. The case study shows that the wind power capacity credit decreases and the adequacy capacity cost increases with increase of the wind power capacity. The adequacy capacity cost reaches as high as 0.06 yuan/kWh when the wind power capacity makes up 10% in the power system.

Key words: Wind power, capacity credit, capacity adequacy, cost, effective load carrying capability