Distributed economic dispatching method of power transmission network

The invention provides a distributed economic dispatching method of a power transmission network. The method comprises the steps of (1) initializing marginal generating cost IC of each generator and marginal power consumption benefit IB of each flexible load; (2) calculating the IC and IB by the consistency algorithm; (3) respectively calculating the output power of the generator under the IC and the power consumption power of the flexible load under the IB, and determining whether the power is within the limiting range; (4) calculating the power deviation; (5) determining whether the IC and the IB are equal, and determining whether the power deviation absolute value is within the specified error range, if both conditions are met, finishing the algorithm, and otherwise, returning to step (2). According to the method, the local information between power elements are interacted to transmit the global economic dispatching information, so as to achieve the optimal economic dispatching a power grid; the communication topology cost is reduced; the communication load pressure is reduced; the robustness is improved.