In view of such issue that response load at the demand side has no way to have the same output feature as the traditional synchronous generator on the time scale

a kind of robust optimal scheduling model of transmission network considering source-load coordination is proposed in this paper. First

the uncertainty model of renewable energy output is set up in accordance with the operation risk due to source load fluctuations in the operation of the transmission network. The uncertainty model of response of the demand side is set up considering that the controllable load has no way to perform real time response. Then

the established operation risk model is combined with the robust model and the boundary of the wind power uncertainty set is dynamically adjusted by solving the robust model so to realize the collaborative optimization of operation cost and operation risk. Finally

a power transmission network system in a certain place in the Northeast is analyzed as an example to verify the effectiveness of the proposed model

so that the source and load can be better matched and the system operation risk is thus reduced.