The new round of electricity market reform in China provides a new possible way for the market-oriented solution of large-scale wind power accommodation. A framework of supply-demand interaction contract mechanism across multi-market is presented to improve wind power accommodation. A stochastic programming model is built to minimize the total electricity purchasing cost of wind generators and retailers under the support of marketized trading system including long-term market

spot market

reserve market

and considering demand-side response capability of retailers. By analyzing the model structure

an analytic optimal solution of the single time period subproblem is proposed under the given price sequence generated by scenario tree. The fast solution of the expected electricity purchasing decision-making is achieved. Finally

some key factors of wind power accommodation through supply-demand interaction are discussed at the multi-market decision-making level through a study case.