Large-scale wind power integration brings great challenges to system regulation. In order to solve the problems of wind abandonment due to the insufficient system regulation ability

a method of source and load hierarchical optimization dispatch for deep peak shaving considering flexible load is proposed. This method is divided into two optimization models: the upper layer and the lower layer. The upper layer aims to minimize the peak-valley difference of the system to reduce system peak shaving pressure

and the lower layer model aims to minimize the system cost

including the cost of thermal power and wind abandonment costs

and define the thermal power output. The total system cost with and without the improved flexible load optimization dispatch methods are compared. Finally

an actual example is used to verify the economy and effectiveness of the proposed dispatch method.