In order to solve the economic dispatch problem of DC interconnected power system with high proportion of wind power

a robust optimization method is used to describe the wind power output. A decentralized coordinated scheduling model based on target cascade analysis is proposed. Firstly

the polytopic set of robust optimization is adopted to describe the uncertainty of wind power output. In order to reduce the conservatism of problem solving

a robust conservative adjustment factor is introduced. Then

according to the decomposition mechanism of the decentralized coordination algorithm

the economic dispatch problem is decomposed into the main problem and the subproblem. The main problem is that superior dispatch center coordinates and optimizes the DC tie line power in interconnected systems

and the subproblem is that subordinate dispatch center optimizes the generation plan of each regional power grid independently. Finally

the validity of the proposed model is verified by two examples. The results show that the proposed method not only can remedy conservative deficiencies of robust optimization method

but also can deal with the uncertainty of wind power output while achieving cross-regional wind power accommodation

which is suitable for the current stratified partitioning dispatching mode of China's power grid.