Abstract: A partition method of three-state for wind power accommodation is proposed,which is modeled based on the operation states of power system under different operation conditions.The combined heat and power system with thermal energy storage,electric energy storage and flexible load are divided into three states that include normal state,alert state and emergency state according to wind power curtailment and its variation trend.A phased optimal scheduling model in different states is established and solved by particle swarm optimization algorithm.In normal state,the participation of flexible load and thermal energy storage is able to reduce the pressure of peak shaving and operation costs of system.In alert state,the energy complementary relationship between electric energy and wind power can be found to achieve the target of alleviating wind power fluctuation,which is helpful for safety and stable operation of the system.In emergency state,the system of thermal energy storage transforms abandoned wind power into heat energy to meet the demand for heat supply of users,stores the excess energy and enhances energy use efficiently.