Ancillary service analysis for improving large scale of wind power accommodation

From the point of economic operation and dispatch strategy of the whole power system, the cost and requirement changes of the ancillary service are analyzed with the wind power integration in this paper. And the paper proceeds as follow: first, the current situation of power system ancillary service and wind power accommodation in China is introduced. And then based on the current situation and with the overseas experience as reference the requirement model for increased power system ancillary service with the wind power integration is established, with a provincial power system data as an example, the ancillary service cost caused by the wind power is analyzed, potential influence on the wind power accommodation by the different ancillary service strategies is expatiated. Finally the countermeasures of improved ancillary service for improving large scale of wind power accommodation from the aspect of ancillary service is put forward, also the corresponding ancillary service suggestions which can promote wind power accommodation is put forward., in the one hand ensuring the ancillary service providers´ profit, on the other hand from the sufficient ancillary service the curtailment can be reduced.